This experiment was to show how diffusion worked, that particles move from a higher region of concentration to a lower region of concentration. I set up three glass bowls of water- in the first bowl, the water was cold. In the second bowl, the water was room temperature, and in the third bowl, the water was hot. I dropped a drop of blue food colouring into all three bowls and compared how fast the food colouring in the water diffused. In the first bowl, the food colouring diffused the slowest. This is because the cold temperature slowed down the speed of the randomly moving particles, hence causing the particles to diffuse the slowest. In the second bowl, the food colouring diffused at a moderate speed. The particles moved faster than the particles in the first bowl, but moved slower than the particles in the third bowl, hence its moderate speed. In the third bowl, the food colouring diffused the fastest. This is because the high temperature increased the speed of the randomly moving particles, hence causing the particles to diffuse the fastest.
Here are some photos in the experiment.
At the start of the experiment-
After some time in the experiment-
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