The document describes four experiments involving eggs: 1. Dissolving an egg shell in vinegar to observe the rubbery inner egg. 2. Testing how saltwater affects an egg's buoyancy compared to freshwater. 3. Spinning boiled and raw eggs to see how the yolk affects smooth spinning. 4. Measuring an egg's strength by squeezing it and seeing how many books it can support without breaking.

1. Day 1 – The Transparent Egg
Concept: Chemistry, Acids, & Bases
Dissolve: to chemically break down and seemingly disappear.
Supplies:
• Raw egg
• White vinegar
• Glass container with a lid
What to Do:
1. Place the egg in the container.
2. Pour in enough vinegar to completely cover the egg.
3. Let sit for 24 hrs. (mark start time on the jar lid)
4. Observe.
5. Pour out old vinegar and replace with new vinegar.
6. Let sit for another 24 hrs.
7. Take out of container and observe.
Observations:
• The vinegar will completely dissolve the egg shell leaving just a rubbery egg. You should
be able to see the yolk. If dropped a few inches off of a table, it should bounce.
• Outer egg shell made of calcium carbonate (Ca(CO3)2), which reacts with vinegar
producing carbon dioxide, calcium acetate and water.
Questions to Note:
1. What will happen if the egg shell is dissolved?
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2. Day 2 – The Floating Egg
Concept: Buoyancy – the ability of an object to float in water.
Supplies:
• Raw egg
• 3 clear glasses
• Salt
• Water
What to Do:
1. Fill all 3 glasses ¾ full with water
2. Place raw egg in glass #1 and observe.
3. Put several tablespoons of salt in glass #2. Stir.
4. Place egg in glass #2 and observe.
5. Now put half as much salt in glass #3 as you did in glass #2. Stir.
6. Place egg in glass #3 and observe.
7. Experiment with the amount of salt and observe.
Observations:
Salt causes water to be more buoyant, therefore causing objects to be more buoyant.
• The egg in glass #1 will sink
• The egg in glass #2 will float if you add lots of salt.
• The egg in glass #3 will float, but not as high as #2
Questions to Note:
1. Which is more buoyant: saltwater or freshwater?
2. Will the amount of salt added to the water affect buoyancy?
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3. Day 3 – Boiled Egg vs. Raw Egg
How can you tell a boiled egg from a raw egg?
Supplies:
• One boiled egg
• One raw egg
• A flat surface like a table
What to Do:
1. Take each egg in turn and lay it on its side—the way that eggs like to lay.
2. Spin each egg so that it spins quickly in a circle around itself like a top.
3. Watch what happens to each egg.
4. When you feel you can tell the difference between the ways each egg spins, open them up
and see which is which.
Observations:
The boiled egg should spin more easily and stay in a smooth spin for a longer period of time than
the raw egg. The raw egg should wobble a lot when it spins and its spin will not be smooth. Did
you guess right?
• The egg that is raw has a dense yolk inside it. The yolk rocks back and forth when the
egg spins and throws off the spin, making the raw egg much more wobbly than the solid
one. The yolk in the solid egg stays in one place so that the egg stays in a smooth spin.
• Anytime you spin something that is heavier on one side than the other or with moving
parts like the moving egg yolk, the spinning won't be smooth and the item will wobble.
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4. Day 4 – Egg Strength
This science project is going to measure the strength of eggs. Eggs are known to be resilient
because of their exact shape. The weight is distributed very well around the shell. I will give you
several things to test the weight and pressure that an egg shell can absorb.
First get a good dozen eggs. They are only about $1.00 at the store for a dozen. This all depends
where you live it could cost more. Test on the egg strength is to see if you can break an egg shell
with your hand. Most men will have no doubt they can do this. Make sure the person doing this
does not have any jewelry on their hand which includes rings, bracelets and watches.
Place an egg in the middle of the palm of the hand and have the volunteer wrap their fingers
around the egg evenly. Do not place this on your hand heel. It goes in the middle or cup of the
palm. Now allow them to squeeze the egg. Did it break? If you did this correctly the egg did not
break. Why? Due to the shape of the egg and the strength of the shell weight is distributed evenly
around the egg and you are squeezing around the full base of the egg.
To test this even further take the egg carton and cut it into 4 sections. Place one egg into each
section of the carton holder cardboard and put them in a square about the size of a piece of paper.
Take a large book and place it on top of the eggs so that they support the book corners and raises
it off the counter or table. You will see the eggs do not break and support the weight of the book.
Now add another one on top of the last book. Each time you add a book record if anything is
happening with the eggs. Gently keep adding books to determine how much weight the eggs can
support. When you find the breaking point remove the books that were support and weigh them
to determine how much weight the eggs could handle. This is really incredible.
Be ready with paper towels as this science project will require cleaning up from broken eggs.
You may want to do the project next to a sink in the kitchen or an area that does not have carpet
so clean up is easy.
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