Topic 1-diffusion, osmosis and active transport Flashcards
1
Q
what is diffusion
A
the movements of particles from a high to low concentration
2
Q
where and how does diffusion happen
A
in liquids and gasses as particles are free to move around
3
Q
what is osmosis
A
the movement of WATER particles across a partially permeable membrane from a high to low concentration
4
Q
which way do water molecules pass through osmosis
A
both ways
5
Q
what is active transport
A
upwards movement of particles across a membrane against a concentration gradient using energy transferred during respiration
6
Q
what is the formula for percentage change in mass
A
(final mass-initial mass) / (initial mass) x 100
