THE BOUNCING EGG

AIM:  To make a bouncing egg.

MATERIALS:       1 raw egg
                        Vinegar
                        Drinking glass

METHOD:

1.       Fill the glass with vinegar.

2.       Place the boiled egg in the glass.

3.       Leave the egg in the vinegar until the next day.

4.       Take it out and let it fall from a low height.  It should bounce back.

REASON:
The acid in the vinegar makes the egg shell soft.
 

EGG IN A BOTTLE

AIM:       To push a hard boiled egg into a bottle with a smaller opening than the size of the egg..

MATERIALS:     1 hard boiled egg
                      Bottle with small opening
                      12cm x 12cm piece of paper
                      Matches
                      Cooking oil or butter

METHOD:    

1.       Peel the shell off the egg.

2.       Rub a little cooking oil around the mouth of the bottle.,

3.       Fold the piece of paper like an accordion.

4.       Light the paper with a match and plunge it into the bottle.

5.       Place the egg over the top of the bottle.

REASON:
The gases inside the bottle are heated by the burning paper and this make them expand, with some gas being pushed out past the egg.

When the flame goes out the gases contract and form a vacuum. This sucks the egg into the bottle.

NOTE:       If you want to extract the egg from the bottle, hold the bottle upside down and blow into the opening as hard as you can.  The egg should gradually slide out of the bottle.