You don't need to answer the questions in brackets but please answer the ones that don't. (1 Collect two very similar potted plants. Make sure both of them have moist

soil. Cover the two pots with plastic bags as shown in the diagrams.)

(2 Measure the mass of each plant in its pot, using a top pan balance. Record

this mass.)

(3 Each day for the next week, measure the mass of each plant in its pot

again. Try to do this at about the same time each day. Record all of your

readings in a results table.)

(4 When you have finished all your measurements, look carefully at the inside

of the plastic bag covering the plant. You may find little droplets of liquid.

To check if these are water, touch one of them with some blue cobalt

chloride paper. If the liquid is water, the paper will go pink.)

Questions

A1 What was the variable that you changed in this experiment?

A2 What variables did you keep the same?

(i skipped A3 on purpose because i was told to;)

A4 Explain why the droplets of water formed on the inside of the plastic bag.

A5 Explain the reasons for the di! erences between the results for the

two plants.