Product Description
Video and lesson investigations on the topic of heating air and gases. Key concepts include:
- Room heaters warm up the air around them.
- When air gets hot it expands and rises.
- Observing an object that is affected by the air can show how the air is moving. When air gets heated, the gases that make it up expand and rise.
- This is because the gas molecules in air, which collide with each other all the time, collide much more when they are heated.
- The more they collide, the farther apart they move from each other.
- This motion is called the expansion of the heated gas.
- Hot air is less dense than colder air because its molecules are farther apart from each other.
- Less dense hot air rises in cooler air.
- This is how a hot air balloon is able to rise into the cooler atmosphere.
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