What You Need:
- A large mug or a small pot
- A spoon
- Some ice
- With the help of an adult, pour some very hot water into the cup or pot and stir it slowly in one direction so that the water rotates slowly. You could add some food colouring so you can see the water better.
- Next, place a small ice cube at the centre of the rotating water.
- You should see the ice cube start to spin faster and faster until it is turning much faster than the water around it.
This occurs because the melting ice causes water to sink underneath it. This in turn draws in some of the warm water from the top edges. This water coming in from the edges is what makes the ice cube spin faster. This is the same principle that causes some tornados and whirlpools in rivers to spin up.