Diffusion

Cards (8)

what is diffusion
The net movement of particles from a region of their higher concentration to a region of their lower concentration down a concentration gradient as a result of their random movement.
What are the four factors affecting rate of diffusion
Concentration of particles
Temperature
Surface area (volume ratio)
Diffusion distance
How does concentration affect the rate of diffusion
It gives the diffusion gradient
How does temperature affect the rate of diffusion
If there is an increase in temperature the particles have more kinetic energy so they move faster
How does Surface area affect the rate of diffusion
The larger the surface area the faster the diffusion occurs
How does diffusion distance affect the rate of diffusion
The larger the distance the slower the diffusion occurs
What are the 4 uses of diffusion in organisms
Obtain raw materials
Get rid of waste
Gas exchange for photosynthesis
Digestion
What are the 3 places diffusion can occur(in 2 and across 1)
In air and gases
Across a membrane