Diffusion and Osmosis

• Biologie
• Middelbare school
• havo
• Leerjaar 3

Cells & Osmosis

Diffusion

Describe what happens in the video

Diffusion

• Molecules move from a high to a low concentration
• The movement of molecules is random
• This is a form of passive transport, because the energy comes from the molecules themselves

Try to describe what happens using this new information

How does heat affect diffusion?

1. It has no effect
2. More heat means faster diffusion
3. More heat means slower diffusion

Effect surface area on diffusion

The bigger the surface area, the faster the molecules will be evenly distributed over the available area

Effect concentration gradient of diffusion

The bigger the difference in concentration, the faster diffusion will happen

Misconceptions with diffusion

• Molecules want the concentration to be equal/ try to make the concentrations equal. Molecules have no mind to think with, the move randomly
• Molecules stop moving after the concentrations are equal. Molecules never stop moving, but when concentrations are equal there are equal amounts of molecules moving in every direction.