Activity 6.8
Take two sme
e two small pots of approximately the same size and having
he same amount of soil. One should have a plant in it. Place a
stick of the same height as the plant in the other pot.
over the soil in both pots with a plastic sheet so that moisture
cannot escape by evaporation.
Cover both sets, one with the plant and the other with the stick.
with plastic sheets and place in bright sunlight for half an hour.
Do you observe any difference in the two cases?
he plant has an adequate
11
Answers
Answer:
there will be transpiration on the plastic sheet and other one their will be nothing on stick
Answer:
Brief procedure:
Activity 6.8 asks us to cover a plant with a plastic sheet and see the result with respect to a pot covered with plastic without the plant.
Observation:
Water droplet appeared in Plastic sheet having plant while no water droplet appears in a plastic sheet covered by the stick.
Explanation :
Plant release water molecules in the air. A plastic sheet does not allow these Activity 6.8 plant transpiremolecules to escape. As a result, water droplets appear on the plastic sheet. A pot without plant does not get water molecules as there is no transpiration process going on. If in case few droplets appear then it is due to evaporation. Evaporation is a physical phenomenon, not a life process. In this case, the number of water droplets will be meagre.
A typical example of this phenomenon is the formation of dewdrops. Due to the low temperature in the morning water molecules released from plants condenses and form dew drops.
This suffices the transpirational pull theory; which says plant transpiration creates a pulling pressure in the roots, which result in water and mineral absorption.