....................... is the process by which the plant loses water in the form of water vapor. What happens if: 1. A cup of water at room temperature exposed to the air. ........................................................................................................................................

The process by which the plant loses water in the form of water vapor is called Transpiration.

If a cup of water at room temperature is exposed to the air, the following happens:

1. Evaporation: The water molecules on the surface of the water in the cup gain energy from the surrounding environment. This energy allows them to transform from a liquid state to a gaseous state, which we refer to as water vapor. This process is known as evaporation.

2. Condensation: If the air around the cup is cooler than the water vapor, the water vapor may lose energy and transform back into a liquid state, a process known as condensation. This is why you might see droplets of water forming on the outside of a cold glass.

3. Equilibrium: Over time, the rate of evaporation and condensation will balance out, and the amount of water in the cup will remain constant, assuming no other factors are at play (like someone drinking the water, or the cup being heated). This state is known as equilibrium.

4. However, if the air is dry, the water may continue to evaporate until the cup is empty. This is because dry air can absorb more water vapor before reaching saturation than humid air.