The Bouncin’ Egg
You will need: eggs, water, vinegar, flashlight, bowl
For this biology experiment:
1. Put 1 whole raw egg in a glass of water and Put 1 whole raw egg in a glass of vinegar.
2. The eggs are the same, aren’t they? Now, leave them a few hours.
4. Look carefully. Does the egg in the vinegar still have its shell? Touch it.
It now feels and looks like a rubber ball,
doen’t it?
5. Leave both eggs alone for 7 days.
After that time,
take the egg in vinegar to the dark room and shine a flashlight at it. What do you see? The light
bounces off the egg, doesn’t it?
6.
Take the egg out of the glass of vinegar. Hold the egg a little bit over a bowl. Let the egg drop. Do you think it will splatter. Try it!
What happens?
Your egg bounces! Try it again getting a little higher each time. See how high you can make the egg bounce. What do you think will happen if you try to bounce the egg that was in the water? Hold over the bowl and try.
Why?
- The vinegar, which is an acid, reacts with the calcium carbonate
of the eggshell.
of the eggshell.
- The change makes the shell go soft, then disappear. This is
called “ decalcification”.
- The egg in th glass of water doen’t chemically change.
called “ decalcification”.
- The egg in th glass of water doen’t chemically change.
Fun Fact
You can make chicken bones so soft that you can bend them.
Put a clean wishbone or leg bone into a jar of vinegar. Make
sure the bones are completely covered. Leave them there for 7 days. The bones will go so
soft that you can tiwst them into a knot! Minerals in the bone make it strong and rigid. The
vinegar takes away these minerals and the bones dissolve like the eggshell.
Mini Quiz
The word vinegar comes from two French word-”vin” which means wine and which means sour.
Vinegar has been in use for a long time, but how long?
Mini answer: It is known that vinegar was used in Babylon in 5.000 B.C
You can make chicken bones so soft that you can bend them.
Put a clean wishbone or leg bone into a jar of vinegar. Make
sure the bones are completely covered. Leave them there for 7 days. The bones will go so
soft that you can tiwst them into a knot! Minerals in the bone make it strong and rigid. The
vinegar takes away these minerals and the bones dissolve like the eggshell.
Mini Quiz
The word vinegar comes from two French word-”vin” which means wine and which means sour.
Vinegar has been in use for a long time, but how long?
Mini answer: It is known that vinegar was used in Babylon in 5.000 B.C
Resource: Hinkler Books
0 comments: