floating egg experiment observations

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Floating Egg Science Experiment

Can you make an egg float in water? In this simple science experiment, we take just a few minutes to test the laws of density and discover just how easy it is to make an egg float!

Below you’ll find detailed instructions and our demonstration video as well as the scientific explanation of “why it works.” We’ve also included a more ideas to explore the concept a bit further.

JUMP TO SECTION: Instructions | Video Tutorial | How it Works

Supplies Needed

• 2 Tall Drinking Glass

Floating Egg Science Lab Kit – Only $5

Use our easy Floating Egg Science Lab Kit to grab your students’ attention without the stress of planning!

It’s everything you need to  make science easy for teachers and fun for students  — using inexpensive materials you probably already have in your storage closet!

Floating Egg Science Experiment Instructions

Experiment Setup – Start with some observations about the eggs. Note that they are both raw eggs and have a similar size and weight. Then ask some questions. Do you think that the eggs will sink or float when placed in water? Do you think it’s possible to make them float? If so, how? Write down your hypothesis (prediction) and then follow the steps below.

Step 1 – Fill a tall drinking glass about 3/4 full of water and carefully place the egg into the glass. What happens to the egg? That’s right, it sinks to the bottom.  

Did you know there is a way to make it float? Continue on in the experiment to find out how. 

Step 2 – Fill another tall drinking glass about 3/4 full of water. 

Step 3 – Add 3 Tablespoons of salt to the water and stir until it is completely combined. What do you think will happen if you place the egg into the glass with the salt water? Write down your hypothesis (prediction) and then test it to see if you were right. 

Step 5 – Next carefully place the second egg into the glass with the salt water. What happens to the egg? That’s right, it floats. Take a moment to make some observations. Why do you think one egg sinks and the other egg floats?

Find out the answer in the how does this experiment work section below.

Video Tutorial

How Does the Floating Egg Science Experiment Work

Why does the egg sink in regular tap water, but float in saltwater? The answer lies in the density of water!

Density is a measure of the mass per unit volume of a substance. Simply said, how much “stuff” in a given volume. Water has a density of 1 g/mL (g/cm3). Objects will float in water if their density is less than 1 g/mL. Objects will sink in water if their density is greater than 1 g/mL.

The egg will sink in regular tap water because the density of the egg is greater than the density of water. The egg’s density is only slightly higher than water at 1.03 g/mL, but that is enough to make the egg sink.

When you add salt to the water, you are increasing the density of the water by adding more mass (or stuff) in the given volume. You don’t really change the volume of the water by adding salt. By adding enough salt, you increase the density of the water so that it is higher than the density of the egg and the egg will float!

Other Ideas to Try

Try this experiment again, but instead of using an egg use a potato slice or a carrot slice. You will have to play around with the amount of salt you add to the water because all objects have their own unique density. Add salt a tablespoon at a time and mix well until you cannot see any salt in the solution, then add your object to see if it floats or sinks. Remove your object and keep adding salt until you can get your object to float. To make it a true science experiment, create a data table to keep track of how much salt you add to the solution.

I hope you enjoyed the experiment. Here are some printable instructions.

• Drinking Glass

Instructions

• Fill a tall drinking glass about 3/4 full of water
• Place the egg into the glass of watch and watch it sink
• Fill another tall drinking glass about 3/4 full of water
• Add 3 Tablespoons of Salt and stir until combined
• Place the egg into the glass and watch it float

Reader Interactions

April 3, 2019 at 2:58 pm

i love this experiment

January 23, 2020 at 11:14 pm

I really loved doing this experiment with my class

August 26, 2020 at 2:59 pm

The egg floats because the density of the salt water changes to be greater than the egg and the density of the egg becomes less dense so then the egg floats. But when you put an egg in tapwater the density of the egg is greater than the density of the tapwater which makes the egg sink.

January 20, 2022 at 11:33 am

bro I loved this experiment it was amazing!!! I tried it out with my friends and it worked! Thank you!

February 10, 2022 at 7:19 pm

this is very helpful thank you

March 7, 2022 at 9:56 am

i loved this experiment : )

April 16, 2023 at 11:35 am

I love doing this experiment at home

May 1, 2023 at 9:00 am

It’s amazing thank you for sharing.

November 3, 2023 at 10:18 am

This is my science fair experiment! YAY!

November 25, 2023 at 7:41 am

wow what a great experiment m!!!

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Science Fun

Floating Egg

• Salt (1 – 2 cups)
• A tall drinking glass

Instructions:

1. Pour water into the glass until it is about half full. 2. Place an egg in the glass of water and see if it sinks or floats (it should sink). 2. Stir in lots of salt. Start with 1 tablespoon and stir it until the salt dissolves. Keep adding more salt until the egg floats. 3. Next, carefully pour more fresh water until the glass is nearly full (be careful to not disturb or mix the salty water with the plain water). If you’re very careful, you can get the egg to float between the fresh and saltwater!

VIDEO COMING SOON BUT YOU CAN STILL ENJOY THESE AWESOME EXPERIMENTS!

How It Works:

The egg is denser than the fresh water (more molecules per square inch), this causes it to sink.  When you start dissolving salt in the water, this is increasing the density (adding more molecules per square inch).  Eventually the water becomes denser than the egg causing the egg to float.  When you carefully add fresh water again, this fresh water is less dense than the salt water so it floats right on top!

Extra Experiments:

Are there other liquids you can add to make the egg sink or float? What else can you dissolve in the water to make the egg float?

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Floating Egg Experiment

Will an egg float in fresh or salt water.

Will an egg float in fresh or salt water? The Floating Egg Experiment is an easy hands-on investigation that can be done in your own kitchen! I have used this lab before as a class demonstration, group lab investigation, and with my own kids at home. There are several science terms and concepts that can be taught in this experiment including density, solutions, mixtures, saturation, concentration, mass, and the list goes on. Scroll to the bottom to download your own Floating Egg Experiment Lab Sheet!

*Don’t miss out on the Salt Water Density Lab featuring a free observation lab sheet too! And be sure to check out all of our  FREE Science Resources including our  Labs & Experiments !

As a Christian Book and Amazon affiliate, we may earn commissions from qualifying purchases. Thank you for your support. As always, we only recommend items that we truly feel will benefit your homeschooling experience. We appreciate it.

Floating Egg Experiment Introduction

Before conducting the experiment, there are a few things you should cover with your students to create a meaningful learning experience. First, spend time talking about the terms below. We discuss the meaning of salinity and a homogeneous mixture amongst other concepts. Since this investigation is demonstrating the difference in density between salt water (oceans) and fresh water (rivers, lakes, ice), it works well with our Water Distribution Unit .

Important Terms and Facts

– Salinity  describes the amount of salt dissolved in water. Saline water is water with salt dissolved in it. 

– A homogeneous mixture  is a type of mixture where a solute (salt) is dissolved into a solvent (water). This type of homogeneous mixture is called a solution . 

– Density is the amount of mass in volume. Volume is the amount of space something takes up. 

– Buoyancy is a force on an object making that object rise or move forward.

Floating Egg Experiment Lab Sheets

Write hypothesis.

Once you have introduced the key terms in the Floating Egg Experiment, make sure the students are given the following facts and the FREE FLOATING EGG EXPERIMENT LAB SHEETS.

• Water has a density of 1 g/mL (g/cm3).
• Objects will float in water if their density is less than 1 g/mL.
• Lastly, objects will sink in water if their density is greater than 1 g/mL.

After giving your students this information, guide them to write a hypothesis for the posing question, “Will an egg float in salt or fresh water?”

For example, their hypothesis could read like this:

If I add 1 TBSP of salt to every ½ cup of fresh water, a raw egg _____________________________ float.

Students will plug in the words, “will” or “will not,” in the blank of the hypothesis.

Identify Variables

Identifying variables in an experiment is something that takes most students practice. It is a good idea to continuously review the following terms. Check out our  Scientific Method unit to get more practice.

Manipulated Variable – variable that is different in the experiment. It is the thing that is manipulated. *In this case, the manipulated variable is the amount of salt added to the water.

Responding Variable – variable that is being tested. It responds to the manipulated variable. *Hence, if the egg floats or not. 

Controlled Variable – variable(s) in the experiment that do not change or remain the same. *In this lab, the glasses and raw egg are the controlled variables. 

Review the experiment before conducting...

For you teachers, it is always advisable to try an experiment out first to ensure that it works the way it is supposed to. There is nothing worse than demonstrating in front of a group of students for an experiment to flop! It has happened to the best of us… yes, it has happened to me! Watch this video I found on YouTube to get a step by step of the experiment. It is pretty easy to demonstrate. 

I have used this experiment for years with the exception of the salt water with the fresh water on top. That aspect of the experiment was new to me. So, I too tried this at home before showing it to my students. *I wonder if it will work with glasses that aren’t quite so narrow at the bottom? Let’s see…

Gather Materials

The materials list is likely to all be found within your kitchen. I love experiments that do not require a tricky supply list. So, gather 3 raw eggs, water, salt, a spoon, 3 clear glasses, and a measuring cup and tablespoon come in handy.

Fresh Water first and then Salt Water

I always start demonstrating the egg sinking in the fresh water first. Next, you will show how adding salt to the fresh water will change its density. Thus, the egg will now float in the denser salt water. In the Egg Floating Experiment, I use 1 tablespoon of salt per 1/2 cup of water. This enables the students to measure more precisely. Some kids need the restrictions.

*On their lab sheets, students will draw and record observations and make conclusions.

Extended Learning...

This aspect of the Floating Egg Experiment is a new for me. I never did this in years past, but what a great addition. You can choose to demonstrate this last glass or the students can continue to follow the procedures on their lab sheet. In the end, take the time to talk about the science behind this experiment. This is where the science comes all together!

What's the Science behind it?

It’s very important that before, during, and after an experiment that you are explaining the science behind the experiment. If you skip this step, then the lab becomes merely a fun hands-on activity with no real science connections. The experiments are meant to help the students get past the surface and begin to soak in the abstract and unseen science behind it.

Glass #1 – The egg sunk to the bottom in glass #1 because the egg is more dense than the water. Hence, the egg has more mass in its volume than the water does. 

Glass #2 – The egg floats in salt water because the salt water is more dense than the egg. This means that the salt water has more mass in its volume than the egg does. The salt adds mass to the volume of the water creating a more dense liquid.

Glass #3 – When the egg is put in the cup, the glass is only half full with a mixture of salt and water. This causes the egg to float in the salt water instead of sinking. When plain water is added to the salt water, the egg remains in the middle of the glass because of density. The plain water is the least dense, then the egg, and the most dense is the salt water at the bottom of the glass.  

*When the floating eggs are pushed into the salt water, the eggs float right back up to the top of the salt water. This is due to buoyancy. The force of the salt water causes the egg to rise back up. 

DOWNLOAD FLOATING EGG EXPERIMENT LAB SHEETS

Check out these other free resources.

John 4:14  – But whosoever drinketh of the water that I shall give him shall never thirst; but the water that I shall give him shall be in him a well of water springing up into everlasting life.

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April 10, 2014

Salty Science: Floating Eggs in Water

A density demonstration from Science Buddies

By Science Buddies

Key concepts Density Mass Volume Concentration Buoyancy Water Introduction Have you ever wondered why some objects float in water and others sink? It has to do with the density of the objects compared with the density of the water surrounding them. If an object is less dense than the water around it, it will float. Because salt water is denser than freshwater, some things float more easily in the ocean—or extremely salty bodies of the water, such as the Dead Sea. You can make your own dense water by adding salt to tap water. In fact, if you add enough salt, you can make the water so dense that an egg will actually float in it! Explore how this works in this science activity.   Background If you put an egg in a cup of tap water, it will sink to the bottom. Why is this? Because the density of the egg is higher than the density of tap water, so it sinks. Density is the mass of a material per unit volume. For example, the density of freshwater under standard conditions is approximately one gram per cubic centimeter.   But, if you add enough salt to the water, the egg will actually float back up to the surface! Adding salt to the water increases the density of the solution because the salt increases the mass without changing the volume very much.   When enough salt is added to the water, the saltwater solution's density becomes higher than the egg's, so the egg will then float! The ability of something, like the egg, to float in water or some other liquid is known as buoyancy. But just how much salt is needed to make an egg float? In this science activity you'll figure that out by making solutions with varying concentrations of salt in them.   Materials

Measuring cup

Large container, such as a large bowl or cooking pot (It must be able to hold at least three cups.)

One half cup of table salt

Five cups that hold at least 16 ounces each

Permanent marker (if you are using plastic cups) or masking tape and a pen (to label nondisposable cups)

Three spoons for mixing salty solutions

Soup spoon for egg transfers

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  Preparation

Take the egg out of the refrigerator and allow it to warm to room temperature. Be sure to always wash your hands after handling uncooked eggs because they may carry salmonella.

Pour one and one half cups of water into your large container.

Add one half cup of salt to the large container and stir to dissolve some of the salt (it will not all dissolve yet).

Add one more cup of water to the large container (making two and one half cups total) and stir to dissolve the remaining salt. The salt should be completely dissolved before you go on to the next step. It may take several (five to 10) minutes of stirring, so you may need to be patient. Why do you think it's important to start out with a solution that has such a high concentration of salt?

Arrange the five cups on a surface, going in a line from left to right. Label the cups 1 to 5. If you are using plastic cups, you can use a permanent marker to label them. If you are using nondisposable cups, you can use masking tape and a pen to label them.

Add three quarters cup of the salty solution you prepared to cup 1.

Add three quarters cup of plain tap water to cups 2 through 5. (Cup 5 will be plain tap water.)

Add three quarters cup of the salty solution you prepared to cup 2 and mix it. What is the salt concentration in cup two compared with cup one?

Add three quarters cup of the salt solution from cup 2 to cup 3 and mix it. What is the salt concentration in cup 3 compared with cups 1 and 2?

Add three quarters cup of the salt solution from cup 3 to cup 4 and mix it. What is the salt concentration in cup 4 compared with the other cups?

Use a soup spoon to place an egg in cup 5. Does the egg float?

Use the spoon to take the egg out and place it in cup 4. Does the egg float?

Repeat this process with cups 3, 2 and then 1. In which cup does the egg first float? If the egg floated in more than one cup, did you notice any difference in how it floated? What does this tell you about the density of the egg?

Extra: In this science activity you figured out, within a factor of two, how much salt it takes to float an egg. You could narrow down the range further by testing additional saltwater solutions to try and determine the egg’s density. To do this, start your solution with the salt concentration in which the egg first floated and make a new dilution series, as you did before. Now in which cup does the egg first float? What does this tell you about the density of the egg?

Extra: Repeat this activity using several more eggs, possibly both hard-boiled and uncooked eggs. Do you get the same results with other eggs or is there some variation between different eggs? For testing hard-boiled versus raw eggs, you should test the same egg, first raw and then after hard-boiling it to investigate any differences.

Extra: Find out how much salt there is in seawater. From the results of your activity, do you think an egg would float or sink in seawater?

 [break] Observations and results Did the egg float in cup 1 and 2, but not in cups 3, 4 or 5?   You likely saw that the egg floated best in cup 1, floated a little less in cup 2 (but part of it was above the surface) and did not float in the other cups. Cup 1 had the undiluted salty solution that you originally prepared, which was one half cup of salt in two and one half cups water total. The concentrations of the salt solutions in cups 2 to 4 were halved as you increased in cup number; for example, the concentration of the salt in cup 2 was half that of cup 1, and the concentration of the salt in cup 3 was half again of cup 2. (Cup 5 had plain tap water.) The egg should have sunk in cups 3, 4 and 5 because the density of the egg was higher than the density of the solutions (or plain tap water) in those cups. Cups 1 and 2 had more salt in them than the other cups (with cup 1 having the most salt), which means these solutions were denser. The egg should have floated (with part of it above the water surface) in these two cups because the solutions were denser than the egg. The actual density of the egg is in between the density of the solution in cup 3 and that in cup 2.   More to explore What Is Density? , from Charles E. Ophardt, Elmhurst College Why Is the Ocean Salty? , from Herbert Swenson, U.S. Geological Survey Publication Fun, Science Activities for You and Your Family , from Science Buddies How Salty Does the Sea Have to Be for an Egg to Float? , from Science Buddies

This activity brought to you in partnership with Science Buddies

Floating Egg Science Experiment ( Using Salt, Sugar & Saline Water)

• December 10, 2020
• 10 Minute Science , 5-6 Year Olds , 7-9 Year Olds , Physics , Rainy Day Science

Hello everyone! Today we have come up with simple ‘ Floating Egg Science Experiment with a twist’ that can be done within 5-10 minutes.

My kids call it as a pre-breakfast activity. This is an easy and funny experiment to teach density for kids .

We know that some things float in the water and some others not. Do u know why the things sink in the water!? Let us learn something about floating science using eggs.

Floating Egg Experiment

This activity is a cool way to learn the concept – density! We are going to perform the experiment with four different liquids to understand the science behind floating objects in water.

We commonly see that eggs sink when we put in the water. What is the reason behind this!? Does egg sinks the same way when dropped in other liquids? We will perform a simple activity to learn the science behind it.

Try our 20+ Egg Science Experiments

Materials Required for the Activity

• Saline water (You can find saline water in any of the local pharmacies)
• Four glass jars (Either you take glass jars or beakers, make sure they are tall and wide enough to drop an egg)
• Four Raw Eggs (Ensure the eggs are not broken or given any crack to avoid the unnecessary mess with the leaky eggs during experiment)
• Fill one tall drinking glass or glass beaker about ¾ full of water.

• In the same way, fill the other glass with salt water. To prepare salt water, put 1-2 cups of salt in 500ml of water. Stir it with the spoon. That’s it. You are done with making salt water.

• Now it is second drinking glass turn! Fill it with sugar water. Prepare the sugar water same like how we made salt water in previous step.

• Saline water! Yes, we are using saline water as well to observe the floating science with eggs. Fill the fourth glass beaker with saline water.

• Finally, we have arrived to the kid’s favourite step i.e. dropping egg into the tall drinking glasses.

My younger daughter is eagerly waiting for my instructions to drop the egg in the liquids. When I said so, she carefully dropped the raw eggs into the four glasses filled with four different liquids each.

Ask your kids to observe the results that in which liquid the dropped eggs are floating or sinking.

On the initial test, we only had egg floating in the salt water. The sugar water was not dense enough to make the egg float. So we tried to add more sugar to the already prepared sugar solution.

Finally we made the egg float in the sugar water as the water is now more dense due to the added sugar.

How Does the Floating Egg Science Experiment Work?

Let us discuss the results of our experiment. The raw egg dropped in the tap water sinks immediately as soon as it is dropped. On the other hand the egg in the salt water floats.

We observe the same results with the sugar water as well. The raw egg floats nicely in sugar water as well.

How about our egg in the saline water? The egg didn’t float surprisingly in the saline water.

Now let us discuss on what made the eggs in salt & sugar water float and why the egg in normal tap water and saline water sink!?

Science behind floating egg

The egg in the glass of regular tap water sinks to the bottom because the density of egg is more compared to density of water.

Why the egg in salt water floats? When the salt is added to the water, it increases the density of the water and hence the density of the egg slowly becomes lesser than the salt water.

You are dissolving the more the salt into the water means you are increasing the density of water. The denser the liquid is the easier for the object in the water to float.

The same formula applies to the sugar water. The density of sugar water is more than the density of egg.

On the other hand, saline water is made of salt and water. However, the density of the saline water that we used seems to be lower than than egg. Thus it floated in the sugar water and sinked in the saline water.

Density is a concept dealing with how closely a substance is packed to be together.

We will compare this concept with our daily life things. For example: consider we have two bowls one is filled with salad and the other is with rice.

Both are of taken in same quantity but we feel the salad bowl is lighter than the rice bowl because the ingredients are packed tightly in the rice bowl than the salad of lettuce and vegetables which are very light in nature.

In the same way, the molecules in the salt, sugar, and saline water are packed more closely and makes the salt, sugar, and saline water denser than the water where the molecules are packed lighter thus making it less denser.

Even the egg has some density but less than the salt water and hence the egg floats in salt, sugar, and saline water.

So, when you go to swimming pool or beach or ocean, observe that you will float easily and lightly compared to salt water. The denser the liquid, the easier you will float! Amazing right!?

Experiment Extensions

Try different liquids and different substances to dissolve in the water in order to make an egg float.

Try these Density Science Experiments :

9 Layer Density Tower

Hot & Cold Water Experiment

DIY Sugar Density Rainbow

Oil, Food Color & Water – Fireworks

How to make Lava Lamp

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Floating Egg Experiment

This floating egg experiment is a lot of fun for kids to try! You can get an egg to float in the middle of the glass and it’s almost like a magic trick! You only need eggs, salt and water. Kids can learn about density with this cool science experiment!

RELATED: Dancing Corn Experiment

Floating Egg Science Experiment

Have you ever made an object float? How about when you go swimming in salt water, do you notice you float much more easily?

This science experiment explores the difference between salt water and fresh water and why objects float in salt water!

Watch the Video Tutorial!

The science.

This is a classic science experiment that shows how changes in the density of a liquid can affect whether an egg sinks or floats.

When you place an egg in regular water, it will sink to the bottom of the glass because the egg is denser than the water. There are more molecules per square inch in the egg than the water, causing the egg to sink.

When you start to add salt to the water, the salt dissolves and the molecules spread out and increase the density of the water. Now there are more molecules per square inch in the water, which causes the egg to float.

Water Only Glass

The egg sinks because it is more dense than fresh water, meaning there are more molecules per square inch.

Salt Water Glass

Adding salt to the water increases its density by adding more molecules per square inch, causing the egg to float. The egg is less dense than the salt water.

Water & Salt Water Glass

When you fill up the glass halfway with the salt water, the egg floats. When fresh water is added on top, it is less dense than the salt water, so it floats on top, allowing the egg to still float in the middle.

The egg continues to float in between the space where the fresh water meets the salt water because the egg is still less dense than the salt water but more dense than the fresh water.

How to do the Floating Egg Experiment

1. Carefully add your eggs into each cup.

You will need 3 eggs.

2. Pour fresh water (cold tap water is fine) into the first cup.

3. Make the salt water.

Boil hot water in a kettle. Adults to assist with this.

Add 1/4 cup of salt into a pouring cup.

Then add about 2 cups of the hot water.

Stir until dissolved and clear.

Add the hot water into the far right cup until the water line matches the first cup. The egg should now float in this cup.

Note: if it does not float, you need to repeat with more salt and try again.

4. Add the salt water into the middle cup.

Fill until halfway up the cup. The egg should still float. If you do not have enough salt water, repeat the step above to make more.

Now pour fresh water on top of the salt water. The egg should now stay in the middle of the cup.

Now you have all three cups showing how eggs can float or sink in water!

See more science experiments about density:

• Dancing Corn Experiment
• Oil & Water Experiment

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• 2nd Grade Science Curriculum

Floating Eggs

To teach students about density by showing that denser salt water will make an egg float.

Project Details

Grade Level

• 2 clear containers
• Measuring spoons
• Stirring spoon
• Does an egg float better in freshwater or saltwater?
• To begin your floating eggs experiment, fill your two containers with water. Make sure the amounts are equal.
• Use the measuring spoons to pour seven tablespoons of salt in the first container of water. Do not put any salt in the second container.
• Stir the container of water until the salt is completely dissolved. This may take a couple of minutes.
• Gently place one raw egg in each container.
• Watch the eggs for a few seconds. What happens?

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Floating Egg Experiment

What happens when you toss a coin in water? It sinks, doesn’t it? But why does an apple float in water without sinking to the bottom? Some things float while others sink when you put them in water, because of a concept called density.

Sometimes, understanding the theory behind buoyancy and density can be difficult and confusing for little children. In such cases, performing some simple science experiments for kids like the floating egg experiment demonstrates the concept of density to the kids.

Here is a step-by-step guide to performing the floating egg experiment:

Things You Need For The Floating Egg Experiment

• Steps To Set-Up The Floating Egg Science Experiment
• The Science Behind Floating Egg Density Experiment
• You Can Do More With Floating Egg Science Experiment

The floating egg science experiment is a simple and inexpensive way to help kids understand their lessons on density. All you need are some eggs and saltwater.

Here is a list of things you’ll need to perform the experiment:

• 2 Eggs (ensure they are the freshest eggs possible)
• 2 large glasses
• 2 – 3 cups of water 

Steps To Set Up The Floating Egg Science Experiment

Ready for an egg-citing adventure? Then, follow these instructions to perform the floating egg density experiment:

• Pour water into each of the glasses until they are about ¾ full. 
• Add the ½ cup of salt into one glass of water and stir till it is completely dissolved. 
• Add one of the eggs to the glass with plain water and see what happens. The egg will sink to the bottom.
• Now add the second egg into the glass with the salt solution. And voila! You have a floating egg.

The Science Behind The Floating Egg Density Experiment

So, why did the egg float in the salty water, while it sank to the bottom of the glass with plain water? Let’s learn about it by understanding the science behind the floating egg experiment.

• Why does the egg float in saltwater?

The egg has a lower density than the saltwater. Since the egg is lighter than the salt solution, it floats in the salty water.

Have you ever wondered why things and even humans float on the Dead Sea? It’s simple, density! The Dead Sea has an extremely high concentration of mineral salts, which increases its density. The water is so dense that even the human body is lighter than it, which makes it float.

• Why does the egg sink to the bottom of the glass with plain water?

An egg has a higher density than plain water, which is why it sinks in the glass with plain water.

• What is density and buoyancy?

Density is defined as the mass of a particular substance per unit volume. The relative lightness, or ability of a substance to float or rise on a liquid, is called buoyancy. Buoyancy is also the upward pressure or force exerted by a fluid, which causes an object immersed in the liquid to rise or move upwards. The buoyant force is directly proportional to the density of the liquid in which the object is immersed.

You Can Do More With The Floating Egg Science Experiment

It’s time to rack your little scientist’s brain. What else can you use to perform the floating egg experiment?

• Instead of salt, use sugar and see if the egg floats in that solution.
• Can the egg float in other liquids like milk, oil or even warm water?
• Try the experiment with a hard boiled egg and see if it floats in water.  

Check our kids learning section for more experiments, activities and other learning resources.

Frequently Asked Questions On The Floating Egg Experiment

What do you learn from the floating egg science experiment.

The floating egg science experiment is a great way to understand the concepts of density and buoyancy. Additionally, it teaches us that objects with lower density float, while those with higher density sink.

What do you need to perform the floating egg density experiment?

The floating egg experiment needs very few ingredients, all of which can be easily found in our kitchens. You’ll need water, salt, eggs and glasses to perform the experiment.

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Putting The Pretty In Preschool

Finding Beauty In Everyday Early Childhood Experiences

Floating Egg Science Experiment

March 25, 2022 by Annette Kaminsky Leave a Comment

In a whole range of egg colors with expressive faces drawn on, this floating egg science experiment includes a dose of art and drama. The experiment is simple to do and promises to be a huge hit with your little learners.

Supplies To Collect

The supplies for this dramatic science experiment are easy to procure, as you probably already have them in your home . Gather the following:

• pitcher of water
• two 500 ml glass jars
• tablespoons
• store-bought egg dying kit
• black permanent felt pen

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Performing The Floating Egg Science Experiment

With a permanent felt pen, carefully draw chick feet and a worried face on one side of the eggs selected for the experiment. Draw feet and a happy face on the other side of each egg.

Note: Crayons can be used instead to decorate the eggs.

Then dye the eggs in different colors. I use color tablets from a store-bought kit for the eggs, but you could use a home recipe.

Carefully drop the color-dyed eggs back in the egg carton, using an egg dipper if available. Let the eggs dry.

Pour 1½ cups water into two jars.

Add 3 tablespoons salt to one jar, and stir it into the liquid. Add no salt to the other.

Pick a decorated egg to gently drop into the unsalted jar of water. Observe if it floats or sinks . Then scoop the egg out of the liquid and have participants pick the feeling the “chick egg” might be experiencing: (worried, scared.)

Carefully drop the same egg into the saltwater jar. Observe if the egg now floats or sinks again. Have participants pick the feeling the “chick egg” is probably experiencing: (relief, happiness.)

Try this science experiment with other colored eggs. Participants may enjoy picking an egg in their favorite color to drop in the jars.

Related: Reptile Egg Science Experiment

The Science Behind This Experiment

An egg is denser than water, so it sinks. But when salt is added to water, it increases the density of the liquid. When enough salt is added, a raw egg will float.

Floating Egg Experiment Extensions

This floating egg experiment could be extended by:

• using large and small-sized eggs , and recording how much salt needs to be added to a jar for each one to float.
• dying the eggs in different methods .
• reading a picture book about feelings before or after performing the experiment.

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Scented Playdough Activities

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© Annette Kaminsky  March 25, 2022

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Breadcrumbs

Floating Egg Science Experiment

Here are the steps to perform the experiment:

Materials needed:

A glass or container

Instructions

Fill the glass or container with water, leaving some space at the top.

Gently place the egg in the water. The egg should sink to the bottom.

Take the egg out of the water.

Start adding salt to the water, a tablespoon at a time, and stir until the salt dissolves.

Place the egg back in the water after each addition of salt and observe what happens.

Keep adding salt until the egg floats to the surface and remains there.

Explanation

The density of water increases as salt is added to it, making the water denser (more molecules per square inch). When the egg is placed in the plain water, it sinks to the bottom because the density of the egg is greater than that of the water. However, as salt is added, the water becomes denser than the egg, causing the egg to float to the surface.

This experiment illustrates the concept of buoyancy and the Archimedes' principle, which states that the buoyant force on an object is equal to the weight of the water displaced by the object. The egg floats because it displaces a volume of water that weighs more than the egg.

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Science project, floating eggs: a pre-breakfast experiment.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine! Do you know why some things float and other things don't? In this experiment, you'll use eggs (and a few scoops of salt) to study the science of floating.

Will an egg float better in salt water or fresh water?

• 2 clear containers
• Measuring spoons
• Stirring spoon
• To begin your floating eggs experiment, fill your two containers with water. Make sure the amounts are equal. When you're doing a comparing experiment like this, all the variables , or factors that make up the project, should be the same -- except one (in this case, salt water instead of fresh water).
• Use the measuring spoons to pour seven tablespoons of salt in the first container of water. Do not put any salt in the second container.
• Stir the container of water until the salt is completely dissolved. This may take a couple of minutes.
• Gently place one raw egg in each container.
• Watch the eggs for a few seconds. What happens?

The egg should float in salt water, but not in fresh water.

The key to this experiment is density . Density deals with how closely packed together a substance is. You can see density in your food. Imagine you have two bowls that are the same size. In one bowl, you have a salad, but the other one is full of a pot pie. Even though each bowl is filled with food, the pot pie is much denser because the ingredients are smooshed closer together than a light salad of lettuce and just a few vegetables.

In the same way, salt water is denser than fresh water. The molecules are packed tighter, and this density allows an egg to float on the water's surface. Remember that eggs have density too, but because an egg's density is less than salt water's density, you saw floating eggs. On the other hand, an egg is denser than fresh water -- that's why it sunk to the bottom of the container.

Equipped with just a bowl of salt water and a bowl of fresh water, you can test the density of all sorts of ingredients in your kitchen. Do you think a mushroom would float in both liquids? What about a block of cheese? You can even bring out the eggs again -- what do you think would happen if you tried a hard boiled egg instead of a raw one? Keep guessing and testing like a real scientist!

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Bookmark this to easily find it later. Then send your curated collection to your children, or put together your own custom lesson plan.

Floating Egg Science Experiment

You will need:

• Half fill each glass with water.
• Leave the first glass of water as it is. Put 2 tablespoons of salt in the second glass and 4tbsp in the third glass.
• Give the salty water a good stir.
• Carefully lower each egg into each glass. What has happened to each egg?

The Science Bit…

Did you know…

Experiment even more….

• Put the egg in the water without salt first, then slowly poor salt into the cup and watch the egg rise!
• Alter the volume of water, the amount of salt and use different objects.
• Test what objects float without using any salt at all – Don’t forget to check with an adult first before putting household objects in water.

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Floating Egg Experiment

To play this science experiment, click on the link below:

https://www.turtlediary.com/kids-science-experiments/floating-egg-experiment.html

To know more about different science experiments, please visit www.turtlediary.com

Hope you have a good experience with this site and recommend to your friends too.

Floating Egg Experiment is a simple science experiment for kids. With the use of an egg, salt and water, kids will learn and understand the concept of floating. They will learn how and why lighter objects can easily float in water and heavier objects sink to the bottom. Kids will enjoy this simple experiment as they learn about one of the important phenomena of physical science.

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Simple Science Experiments: Floating Egg Experiment

March 18, 2020 by Selena Robinson 4 Comments

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It’s time for another one of our simple science experiments !

This time, we’re learning about salinity and floating with a simple floating egg experiment .

My boys are entering first and second grade, respectively.

These are excellent ages to introduce science experiments – especially ones that are low-prep, inexpensive, and simple to do, right?

Check out how we learned about salinity by making an egg float!

This would also be a great science lab for small groups or science centers.

Simple Science Experiment: Floating Egg Experiment

Like all of our science experiments, this one is super easy and requires absolutely no scientific expertise.

To complete this easy science activity, you’ll need the following:

• Clear glass

We started by cracking open the Usborne First Encyclopedia of Science . (This is an affiliate link .)

It’s an excellent, hands-on introduction to scientific concepts for kids in grades 1-4.

The boys and I read the section about floating together.

We learned that there are places on Earth where water is so salty you can actually read a newspaper while you float along!

In the book, we read the instructions to learn how to recreate the same type of environment that allows human beings to float in salty water.

Then, we were off and running!

We gathered the supplies and got to work.

We poured each glass half full of water.

Then we added 10 teaspoons of salt to one of the glasses.

(Don’t put any salt in the other glass of water.)

When we placed an egg into the glass that didn’t have salt in it, the egg sank right to the bottom like normal.

But when we added an egg to the glass filled with salty water, it floated right to the top.

The kids got a kick out of watching me push it down, only to see it pop right back up!

And that’s how salinity works! Salty water is denser (heavier) than plain water.

So heavy, in fact, that it can support the weight of heavier objects like an egg.

This entire floating egg experiment took about 10 minutes from start to finish.

So if you’re looking for a super quick science experiment, this one’s perfect!

Stop by to see our other science learning ideas!

August 31, 2015 at 8:40 am

Aren’t those Usbourne books great? I break mine out all the time. This is such a fun, simple experiment. Weren’t your boys surprised they could actually make the egg float? My kids were amazed!

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Salt Water Egg Experiment

Will it float or sink.

The Salt Water Egg Experiment explains why materials (such as an egg) float more in salt water than in fresh water.

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Have you ever tried swimming in the sea? Did you notice that you could float more easily in the open waters than when you're swimming in fresh water or even in a swimming pool? This experiment will help you understand why!

For the Salt Water Egg experiment you will need the following materials:

• Two containers
• Two raw eggs

• Fill the two containers with tap water.
• Add about 6 tablespoons of salt in one container and stir it well with a tablespoon until the salt has completely dissolved in the water.
• Place one egg in each of the containers and observe which one of the eggs float in the container and which one sinks.

The explanation behind this phenomenon is simple - DENSITY! In the Salt Water Egg experiment, you have observed that the egg placed in saltwater floated and the one in tap water didn't. Because saltwater is denser than fresh water, the egg does not end up sinking like it usually does!

Why is this so? Let's first discuss the definition of density and why objects sink. Density refers to the amount of matter contained in a given space or volume. When there's more amount of matter in a given space or volume, the object is then considered denser and at the same time heavier. However, this doesn't mean that density and weight is the same and can be used interchangeably.

Weight refers to the vertical force exerted by a mass of object when subjected to gravity. Unlike density, weight is dependent on the amount of gravity in a particular place. To make it clearer, let's take the egg as an example. The egg's density remains the same no matter where you bring it, whatever the amount of gravity is in that place. However, if you bring the same egg to space, where there is no gravity, it loses its weight! But its density remains the same. That's the difference between density and weight - gravity.

Why Objects Float or Sink

Now let's go back to the question of why objects float or sink. Placing an object that's denser than fresh water automatically sinks. In our Salt Water Egg experiment, because the egg is denser than tap water, it pushes away water particles so it can make space for itself hence the sinking motion. But in the case of the salt water, since it is heavier than ordinary tap water, it is more capable of holding the egg up - hence the egg floating. In easier words, objects sink when their own density is greater than the liquid's density.

Now you must be wondering what's in the salt that makes water denser when mixed with it? When salt is added and dissolved in water, it breaks down into ions that are then attracted to the water molecules. This attraction causes them to bind tightly, increasing the amount of matter per volume (density). Instead of just having the molecules hydrogen and oxygen in the water, sodium and chlorine joins the equation (since salt is made up of sodium and chlorine particles). Saltwater now has more particles in it compared to the ordinary tap water we started with. This is why saltwater is denser than tap water.

So next time you go to the beach or swim in the ocean, you already know the reason why it's so much easier to float in the open waters. In fact, an average person can float like a log with much less effort in saltwater than in fresh water. The key is, the denser the liquid the easier you'll float in it! Amazing huh?

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Science Project Ideas

Floating Eggs

You must have observed that when we lower eggs into normal tap water, it sinks to the bottom. Can you make an egg float? Yes, you can. You will find how in the below science project.

Floating Egg Experiment

Eggs, when placed in salt water, float. In fresh water, they sink.

• Two drinking glasses
• Two raw eggs
• Plain tap water

Instructions

• Fill one glass almost to the top with regular tap water.
• Gently drop one of the eggs into the water in the glass with the spoon. Make your observation about whether the egg sinks or floats.
• Half fill the second glass with water.
• Add 4 tbsp of table salt and stir well.
• Fill the remaining glass with water, almost to the top.
• Place the second egg in the salty water and observe if there is a different result.

Why Do Eggs Sink or Float?

The first egg sinks to the bottom of the glass as regular water has a lesser density than that of the egg. But, on making the water saline, its density increases and becomes more than that of the egg. Hence, it floats. In this connection, it may be mentioned that a body floats in a liquid that has a greater density than itself. If the liquid has a lesser density than the body, it will cause the body to sink.

How to Make an Egg Float: Video

Do hard boiled eggs float.

You can perform the experiment with hard-boiled eggs to get similar results.

Egg Float Test to Check for Bad Eggs

Egg shells are porous. As eggs become old, the fluid inside them evaporates, with air and oxygen filling up the interiors. You can perform a floating egg test to check if your eggs have become bad. A fresh egg will simply sink to the bottom of a jar of fresh cold water. Sitting at the bottom tilted to one side, or having its pointed end downwards still qualifies the egg as edible, though not as fresh as the previous case. However, if the egg floats, then it is stale and is not safe for consumption.

Surprise your friends in your next science fair with this trick. Let them first try floating eggs in fresh water. When they fail, you can produce your floating eggs and later explain the reason.

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SCIENCE 4 FUN

Floating Eggs in Salt Water

Precaution:  Always wear safety goggles and hand gloves when dealing with chemicals. Also, take the permission from your parents for the experiment, or involve them.

Things You will Need

• Ordinary water
• Wide drinking glass
• Fill the glass with ordinary tap water.
• Place the egg in it, and watch the egg sinking to the bottom of the glass.
• Now take-out the egg from the glass and add 4 to 5 tablespoon full of salt in the water
• Stir the water in the glass to completely dissolve the salt.
• Again, place the egg back into the glass and watch the floating egg.

What is Happening?

When the egg is placed in common tap water it sinks to the bottom, because the density of water is less than the density of egg. But, when you add table salt in the tap water, its density is increased. When the density of water became higher than the density of egg, the egg floated.

Try to float an egg in the middle of the water.

To do this, follow these steps:

• Fill the glass half-way with water and add 4 tablespoons of table salt, then stir well.
• Fill a cup with ordinary tap water.
• Now, gently add the water from cup to half-filled glass so two layers of different density water don’t mix together.
• Now place the egg in the glass gently.

If two layers of water are not mixed together, the egg will float in the middle of the glass.

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The Floating Egg Experiment: Free Worksheets

The floating egg experiment.

It’s always so much fun to do a cool science experiment with your kids.

I especially love doing egg experiments because even though they’re mostly easy, they’re also usually pretty dramatic.

The floating egg experiment is a good example.

We did this experiment as part of our ocean unit. Probably half the class correctly hypothesized that the egg would float in the salt water but everyone was excited to see it actually happen.

Here’s the sheet (you can download it below) that I use with my class.

As a class, we fill out the sheet together.

I tell the kids that we’re going to make an egg float in liquid. We read the hypotheses together and each child chooses the one they like the best.  I also always have them circle or underline their choice using a felt pen. You would NOT believe how many of my little scientists erase and change their hypothesis after the experiment is finished!!

After the hypotheses have been chosen, I give everyone a paper egg. They cut it out, write their name on it and decorate it, if they like. Then they glue the egg onto a large piece of chart paper indicating their chosen hypothesis.

I save all these chart papers and refer to them throughout the year. They’re great to use in math lessons where you can talk about graphs, more than, less than, mode, etc.

Here’s an example of what your class graph might look like:

The next step, of course, is to complete the experiment (as described in the worksheet above). After the solutions are made we carefully place an egg in each cup.

It’s always so much fun to see the looks on the kids’ faces when the egg floats in the salt water!

To finish up, the children draw a picture of their observations (I often model this on the board) and we talk about the results and the reasons why the egg floated (the salt water is slightly more dense than the egg).

DOWNLOAD: PDF file for The Floating Egg Experiment

Click for more fun science experiments.

If you’d like to extend the experiment a bit, watch this video. The “Crazy Russian” (that’s what he calls himself) shows how you can suspend an egg in the middle of a glass (with water below and above the egg). It’s very cool!

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6 thoughts on “the floating egg experiment: free worksheets”.

I love this idea! I am printing now and filing it away until we do our ocean unit at the end of this coming school year. Thanks for sharing.Barbarahappyteachingfirst.blogspot.com

Who knew eggs were so scientific? Thanks Barbara!❀ Tammy Forever in First

Fun! Thank you!-Megan First Grade Magic

I'm so glad you're sharing these great experiments and papers to go with. I am embarassed to say that I don't teach much science. But it's also not entirely my fault. The time schedule we're supposed to follow gives us 15 minutes for everything that's not math, reading, and esl. Seriously! I get some science in, but experiments like this seem short and sweet and might be something I could do more frequently. Thanks so much! And if you don't mind my asking, how long is your school day, and how many days are in your school year? We go from 8-2:15 175 days/ year ( during budget cuts, anyway) . Normally 180 days.-ChrissyFirstgradefoundme.blogspot.com

You are going to have me set for Easter science – thanks : )sandi rubber boots and elf shoes

Hi Barbara – That is so cool. I will have to file that away for our ocean unit. THanks for sharing. :o)Vicky Traditions, Laughter and Happily Ever After

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