-
Get a clear, plastic soda bottle with a top that seals well.
- Fill the bottle with water to within an inch of the top.
- Partially
fill an eyedropper with water so it just floats inside the bottle.
- Put the top on. Squeeze the side of the bottle and the eyedropper will go
down. Release the pressure and the eyedropper should go up.
- If the diver does not go down or up you will need to adjust the amount of
water inside the eyedropper.
Try all experiments before showing them to someone else.
