Question 13
Source instructions: For multiple choice problems circle the right answers. Some problems may have more than one right answer. For essay problem, give explanation briefly.
Answer the question 12–14 based on the following paragraph.
Plant loses water through the leaves by transpiration. An experiment was set up to measure the loss of water from the leaves. Prior to the experiment, pot and soil were covered using the plastic bag, as shown in the picture. Loss of water from plant could be regularly measured by weighing the potted plant.
Why must the plastic bag cover the pot and soil?
Answer the question 12–14 based on the following paragraph.
Plant loses water through the leaves by transpiration. An experiment was set up to measure the loss of water from the leaves. Prior to the experiment, pot and soil were covered using the plastic bag, as shown in the picture. Loss of water from plant could be regularly measured by weighing the potted plant.
Why must the plastic bag cover the pot and soil?