Big Idea: All matter is made of small particles and this can explain many of its properties. More info...
Demonstration: This demonstration models gas molecules hitting a wall.
Demonstration: Discussing the effect of area on pressure.
Begin with some simple questions in order to find out what students know about pressure and so determine a starting point for...
So, if you hold your head under water you can detect the pressure of the surrounding water with your ears. (Your eardrum acts...
Here the macroscopic phenomenon of pressure is related to the actions of the particles.
The conservation of energy helps us to understand pressure.
The whole of this section so far has focused on pressure in liquids and gases. What about solids? The simple expression for...
Pupils will readily accept the idea of pressure existing in liquids because it is a familiar phenomenon. However they may have...
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