The Behaviour of Matter- Diffusion

When gas particles, like the perfumes in a can of deodorant, are released into a room they are free to move in any direction. Eventually, they will spread throughout the entire room. Scientists called this process diffusion.

scientists stat the "diffusion is the movement of particles from an area of high concentration to an area of low concentration, until the concentration is equal".

Aim: To observe diffusion in a liquid.
Equipment: Petri dish, water, tweezers, a crystal of potassium permanganate.
Method: 

1. Half full your petri dish with cold tap water.
2. Place the petri dish on your workbench and allow the water to become settled.
3. Using the tweezers, place a single crystal of potassium permanganate in the centre of the petri dish.
4. Observe for 5 minutes.
5. Repeat the experiment using hot water.

Observation:

In cold water: 

This is what it looked like at the
end of the cold water observation.  

This is what it looked like at the
start of the cold water observation.

In hot water:

Explanation: