Question

1. Why is water so important for our body?
2. In what ways is water useful to plants?
3. How can you show that water vapour is present in air?
4. What are the reasons for lowering of the water table in large cities?
5. During a drought, the prices of grain, fruits and vegetables go up. Why do you think t
happens? Do you expect the prices of grain, fruits and vegetables to go up during floo
Why?
6. What are the causes of floods?
7. List four ways in which we can conserve water.
8. Big dams have their own problems. Discuss.
9. What is rainwater harvesting? What are the two ways in which it can be done?​

Answer 1

Explanation:

1) important ways water works in your body:

Protects body organs and tissues. Carries nutrients and oxygen to cells. Lubricates joints.

2) Water is used for transpiration carrier of nutrients from the soil to green plant tissues. Water forms over 90% of the plant body by green or fresh weight basis. Plants can synthesis food through photosynthesis only in the presence of water in their system. Water helps to maintain the turgidity of cell walls.

3) Take ice cubes in a beaker and kept it open place for some time. You will notice that around the beaker there are some water droplets. This droplets formed are due to condensation of water vapor around the beaker. This confirmes the presence of water vapour in air.