1. The experiment involves atmospheric pressure:
2. We need:
- a glass
- some water
- a sheet of paper
3. We pour water into the glass. The glass must be full.
We put a sheet of paper at the top of the glass.
Next, we turn the glass upside-down.
Water does not leak out of the glass.
4. The experiment confirms that atmospheris pressure, which acts in all directions, neutralises the pressure of water.