Materials Required:
l 2 antacid tablets
l Empty plastic bottle, such as a 6-inch-tall shampoo bottle
l Water
l Pan
Procedure:
- Break apart two antacid tablets and put the pieces in the bottle.
- Now fill the bottle about ¼ full with water. Rest the bottle on its side in a pan of water. You will see the bottle-boat chug along the water’s surface.
This Is What Happens:
When the antacid tablets and water combine, they form a gas that escapes through the neck of the bottle. This backward motion of the escaping gas is matched by an equal forward thrust, which propels the boat ahead.
