The hot bottle heats the air inside it. Once the air cools it takes up less space. The air pressure inside the bottle becomes...

Enrichment Activity 5-11 11-14

The paper starts to spin because the heat of your hand heats up the air. This sets up a convection current in the air which...

Enrichment Activity 5-11 11-14

Hot water is less dense than cold water so it rises into the top bottle while the cold water sinks into the bottom bottle...

Enrichment Activity 5-11 11-14

The water in the bowl with the higher water level is under greater pressure, and so water moves through the straw to the lower...

Enrichment Activity 5-11 11-14

The pendulum will move weirdly, maybe reversing or hanging around one magnet before settling above another. A slight change to...

Enrichment Activity 5-11 11-14

Put it in your living room and wait a day or two – it should start working again eventually. Batteries use chemical reactions...

Enrichment Activity 5-11 11-14