Define the term transpiration. Design an experiment to demonstrate this process.

Explanation

The loss of water in the form of vapour from the aerial parts of the plant is known as
transpiration. This is achieved by both, heat of the sun and the pressure difference between
the roots and soil.
Experiment:
`*` Take two small pots having the 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.
`*` Cover the soil in both pots with a plastic sheet so that moisture cannot escape by
evaporation.
`*` Cover both sets with plastic sheets and place in bright sunlight for half an hour.
`*` We could observe water droplets accumulated inside the plastic sheet of the pot in
which the plant is placed.
`*` This experiment shows that water has been lost through the stomata of the leaves of
the plant whereas it cannot be seen in the other pot in which a stick is kept.