3.1 Diffusion Flashcards
What are the 3 ways which particles move?
Diffusion, osmosis, and active transport
What is Diffusion?
The net movement of particles from a region of high concentration to a region of low concentration down a concentration gradient as a result of random movements
What allows molecules to move?
The kinetic energy they contain
Describe how molecules move
They move randomly until they are evenly distributed
What states of matter can diffusion occur in?
Gases and liquids, but rarely solids
How does temperature affect diffusion?
When temperature increases, more heat is converted to kinetic energy, which increases the rate of diffusion
How does distance affect the rate of diffusion?
The larger the distance, the more time it takes for the molecules to randomly move, therefore decreasing the rate of diffusion
How does the concentration gradient affect diffusion?
The greater the concentration between the 2 regions, the faster diffusion occurs
How does the size of the molecules affect the rate of diffusion?
The larger the molecules, the more KE required, decreasing the rate of diffusion
How does the cell wall affect the rate of diffusion?
The thicker the cell wall, the less the rate of diffusion, therefore the thinner the cell wall the faster the rate of diffusion
