Biology- Diffusion (year 9) Flashcards
1
Q
What is diffusion
A
The spreading out of particles from an area of a higher concentration to an area of low concentration
2
Q
Where does diffusion happen
A
In solutions and gases
3
Q
What are particles free to do
A
Move around randomly
4
Q
What is the simplest type of diffusion
A
when different gases diffuse through each other
5
Q
What will make a faster diffusion rate
A
The bigger the concentration gradient
6
Q
What other thing will make a faster diffusion rate and why
A
A higher temperature because it makes the particles have more energy to move around
7
Q
Why are cell membranes clever
A
They hold the cell together BUT they let stuff in and out as well
8
Q
What moves in and out by diffusion
A
Dissolved substances
