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Science - Coggle Diagram

- - - - all of this waves need a 'medium'
        
        medium: is the object where the wave moves through
        
        electromagnetic wave doesn't have a medium so it is not mechanical
        
        light doesn't have a medium
- - - - This effect was first effect by a scientist called Robert Brown
        
        He was looking at pollen suspended on water and he wondered why they were moving randomly
        
        It is the same thing with the dust only that the fluid is not anymore a gas but it is a liquid. Many water particles let the pollen move
- - - - less pressure applied and is spread in the air
    - - change shape and it will avoid the pressure by occupying the rest of the shape
    - - their will be more pressure and if the pressure is a lot the solid would break