Osmosis

Question 1

What is osmosis only

Answer 1

The movement of water molecules

Question 2

What is osmosis

Answer 2

The movement of water molecules from where they are in a higher concentration to where they are in a lower concentration
Through a selectively permeable membrane (or semi/partially) this means that it allows some molecules through but not others

Question 3

Write a brief method for the osmosis required practical

Answer 3

Cut up five pieces of potato into similar lengths (2cm??) and weigh them
Place in bottles with different concentrations of sugar solution for 48 hours
Bolt and weigh them calculate the change in mass

Question 4

What is the independent variable

Answer 4

The one you change (can’t depend on them)

Question 5

What is the dependent variable

Answer 5

The one you measure (you can depend on them)

Question 6

What is the control variable

Answer 6

The one you keep the same

Question 7

What are the independent, dependent and control variables for the osmosis required practical

Answer 7

Independent-the concentration of sugar in the solution
Dependent-the mass of the potato
Control- the temperature, length of time, volume of solution

Question 8

Give examples of where osmosis occurs

Answer 8

Plants - water moves from the soil to the roots

Animals - water moves from the small intestine into the blood