Question

Water cycle does not involve which of the following?

• A. Evaporation
• B. Condensation
• C. Formation of clouds
• D. Rainwater harvesting

Answer 1

The correct option is D

Rainwater harvesting

The correct option is D:

Explanation of the correct option:

1. Rainwater harvesting is a technique or a strategy used for the collection of rainwater to conserve it for future purposes.
2. The water is collected, stored, conveyed through pipes and tunnels, and purified.
3. It can be used in parks, open grounds, washing cars, flushing toilets, etc.
4. This strategy is cheap and reduces the water demand.
5. The rainwater harvesting technology is simple and easy to install and operate.
6. It promotes energy and water conservation as well as improves the quality and quantity of water.

Explanation of the incorrect options:

Option A:

1. In the water cycle, evaporation is a crucial part as it allows a large amount of water to move from the surface of the earth into the atmosphere.
2. The water changes its state from liquid to vapour due to sunlight and the vapour goes up in the atmosphere.

Option B:

1. After evaporation, the water vapour again turns into a liquid state by the process called condensation.
2. Condensation is known to be the contrary process of evaporation.
3. The decrease in temperature converts vapours into liquid or water droplets when it comes in contact with cool air in the higher altitudes.

Option C:

1. Clouds are formed when the water vapour condenses into visible water droplets.
2. The formation of a cloud needs moisture, condensation, and temperature.
3. After the condensation process, the water droplets in the air float and join other droplets to form clusters.
4. These clusters make huge water masses which are said to be clouds.

Final answer: The water cycle does not involve rainwater harvesting.