Floating Egg

Does an egg sink or float in water? What if it does both? In this experiment, make an egg sink and float at the same time!

Materials you'll need

Step-by-step tutorial

  • Step 1

    Gather your materials.

    Photo reference of how to complete step 1

  • Step 2

    Fill the jar about halfway with warm water. Then, add salt until it no longer dissolves when mixed.

    Photo reference of how to complete step 2

  • Step 3

    Carefully put in the egg. Your egg should float to the top of the water!

    Photo reference of how to complete step 3

  • Step 4

    Hold a spoon upside down over the jar and pour warm water over it. Fill up the jar the rest of the way. The egg stays in the same place!

    Photo reference of how to complete step 4

  • Photo reference of how to complete step 5

    Learn moreMagnifying graphic

    The salt water is saturated with the salt, which makes it more dense. The egg is less dense than the salt water, so the it floats to the top. When the fresh water is poured into the jar, it also floats above the salt water. However, the water on its own is less dense than the egg, so the egg doesn’t move. The egg floats at the top of the salt water, but sinks below the fresh water! Cool!

    Experiment further with a hard boiled egg!

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