1
Q
Independent variable
Osmosis
A
Concentration of sugar or salt
2
Q
Dependent variable
Osmosis
A
Mass of potatoes
3
Q
control variable
Osmosis
A
surface area
time
temperature
4
Q
experiment
Osmosis
A
cut 3 potatoes into cylinders
use a ruler to make sure they are all around the same size
measure starting mass of each
one is put in pure water
one in concentrated solution eg 1 mol/dm^3
one in a different concentration in betweeen
leave for a day
pat dry with paper towel and measure final masses
calculate percentage change in mass then plot graphs
