Egg Experiment

you'll need :
3 cups
3 eggs
salt
water

Prepare:

1. Put 3 cups on the table     

2. Fill 2 cups full of water then the other cup 1/2 of water

3.fill 1cup with salt and also the 1/2 cup.

The experiment:
put 1egg to a cup without salt it'll sink
put 1 egg to a cup with salt it'll float
put 1 egg to the 1/2 saltwater than put normal water.

Tip:
don't put too much water in the cups before putting

Questions:
can you see the difference ?
 why does eggs float on salt water?
try leave the eggs in the water for a long time
will it get smaller or not?