A student sets up the apparatus shown below to investigate the rate of transpiration of a potted plant.
Explain why the pot and the soil are enclosed within a sealed waterproof polythene bag.
At the start of the experiment, the mass of the apparatus is 687.45 g687.45\text{ g}687.45 g. After exactly 28 hours28\text{ hours}28 hours, the mass is re-measured and is found to be 675.25 g675.25\text{ g}675.25 g. Calculate the mean rate of transpiration in g h−1\text{g h}^{-1}g h−1. Give your answer to two decimal places.
Describe and explain the effect of: (i) an increase in wind speed on the rate of transpiration. (ii) an increase in environmental humidity on the rate of transpiration.
