Procedure Text
How To Make
An Egg Float
An
egg sinks to the bottom if you drop it into a glass of ordinary drinking water
but what happens if you add salt? The results are very interesting and can
teach you some fun facts about density.
Purpose :
To prove that the density of salt water is lower than the water so
that the egg can float and to determine the freshness of eggs, because a fresh
egg will sink in fresh water but it will float in salty water. A rotten egg
will float in fresh water.
Materials :
1.
Egg
2.
4 tablespoon of Salt
3.
Water
4.
3 of Glass
5.
Spoon
Steps :
1. First, pour water into the
glass until it is about half full.
2. Second, fill glass with 4 tablespoon of salt, and stir the
water to help the salt dissolve.
3. After that,
choose a raw, uncooked egg with no visible cracks in the shell. Place the egg
gently into the water.
4. Next, carefully pour in plain water until the glass is nearly full (be
careful to not disturb or mix the salty water with the plain water).
5. Finally, watch as the egg what happens. (egg floats in the center of glass.!!)
What's happening?
Adding salt to the water puts more molecules into the
water to make it denser. The more salt you add make the more dense the water
becomes until it finally becomes denser than the egg. This makes the egg float.
