Topic 1 - Diffusion Flashcards
1
Q
what is diffusion?
A
the net movement of particles from an area of high concentration to an area of low concentration
2
Q
does diffusion require energy?
A
no, it is a passive process
3
Q
what states of matter does diffusion happen in?
A
liquids and gases because particles in these substances can move around randomly
4
Q
what makes diffusion rate faster?
A
a larger difference in concentration
5
Q
how do cell membranes control diffusion into and out of cells?
A
only small molecules can diffuse through, big molecules cant fit through the membrane
