Lia took 4 leaves & weighed them before the experiment. She then set up the experiment as shown. After 24 hours, she weighed them again. Explain why C weighs less than B at the end of experiment.
Lower surface of C is not covered with vaseline so more water vapour is lost as there are more stomata on the lower surface of the leaves than upper surface.
Describe what happens to the set-up shown and explain why
Regions above & below the cut swells. Food made by the leaves above & below the cut cannot be transported across the cut part as food carrying tubes are removed
A ring of bark is removed as shown in the diagram. What will happen to the fruits? Explain
The fruits become bigger. Food carrying tubes are removed, food made by the leaves cannot be transported down the cut region. Excess food are stored in fruits
Renaldo set up the experiment as shown in the diagram. Which direction will the air bubble in the glass tube move? Explain
Towards the plant. As the plant loses water vapour through the stomata of the leaves, the plant will absorb more water in the glass tube and beaker.
Bambie set up the experiment as shown in the diagram in different conditions. Under which conditions did the time taken for the air bubble to move 50mm shortest? Explain why.
Under these conditions the rate of evaporation is the fastest. Most amount of water evaporates to form most water vapour in leaves and escapes through stomata
