Do some eggcellent science with materials you have at home!

Float an Egg Challenge Supplies:
3 empty glasses (clear, at least 12 oz or larger)
3 raw eggs
1 spatula or large spoon
2 cups of salt
Lots of water!

Step 1: Prep by completely filling two glasses with water (leaving a little room at the top). The third glass can be filled about halfway.
Step 2: Draw faces on your eggs with a marker! Then, drop one egg in the first glass. What happens to the egg in normal water?
Step 3: Add one cup of salt to the second glass of water. Stir water with a spatula or large spoon. Drop the second egg in the second glass. What happens to the egg in salt water?
Step 4: Add one cup of salt to the third glass of water. Stir. Drop the third egg. What happens to the egg? Slowly fill the glass with more water. Can you get the egg to float—or achieve buoyancy—in the middle of the glass?

Doing science with older explorers? Try more challenging missions:
Try using a hardboiled egg or other object that contains some air inside, then repeat the above experiment.
Gather other testable objects and ask your explorers to predict whether that object will sink or float. Track your results!
Try using a different liquid (like milk or juice), or change the temperature of the water. Does an egg float in really cold water?

Special thanks to the Lopez family for helping us with these awesome experiments!

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