Product Description
Video and lesson investigations on the topic of pumps and air pressure . Key concepts include:
- An air pump forces air from one place to another.
- Air pumps can be used to inflate flexible containers with air, especially if they are ‘air-tight’.
- Air contained in a container can give it strength.
- The air, which is a mixture of invisible gases, pushes against the walls of the flexible container, just as the walls of the container push back against the air.
- The more air that is put into a flexible container, the more pressure is exerted against the walls of the container by the air.
- This pressure, in turn, pushes against anything in contact with the outside of the container.
- The inflating ability of air is very useful.
- It has many everyday uses.
- To work properly inflatables must be completely air-tight after inflation.
- Valves let the air in and prevent it escaping out again.
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