Question

1. Why is water so important for our body?
2. In what ways is water useful to plants?
How can you show that water vapour is present in air?
happens? Do you expect the prices of grain, fruits and vegetables to go up during floods als
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?
What are the reasons for lowering of the water table in large cities?
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Answer 1

Answer:

1) protect body organ and tissue

2) water is used to transpiration Carrie the nutrients

Answer 2

Answer:

1. Because it Protects body organs and tissues. Carries nutrients and oxygen to cells. Lubricates joints. Lessens burden the on kidneys and liver by flushing out waste products.
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.

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.

6.

• Heavy rainfall.
• Ocean waves coming on shore, such as a storm surge.
• Melting snow and ice, as well as ice jams.
• Dams or levees breaking.

7.

• Turn off the faucet while brushing your teeth.
• Only run the washing machine and dishwasher when you have a full load.
• Use a low flow shower head and faucet aerators.
• Fix leaks.
• Install a dual flush or low flow toilet or put a conversion kit on your existing toilet.

8. If the rainfall is heavy and the water exceeds the storage limit of the reservoir, then water is released from the dam. ... This causes heavy flooding, which destroys wildlife, agriculture and displaces people from their homes.

9. Rainwater harvesting system, also called rainwater collection system or rainwater catchment system, technology that collects and stores rainwater for human use. Rainwater harvesting systems range from simple rain barrels to more elaborate structures with pumps, tanks, and purification systems.

Broadly there are two ways of harvesting rainwater, namely; surface runoff harvesting and rooftop rainwater harvesting. Rainwater harvesting is the collection and storage of rain for reuse on-site, rather than allowing it to run off. The stored water is used for various purposes, such as gardening, irrigation, etc.

the main reasons are: 1) because of the increasing in pollution the water table gets disturbed. 2) because of less number of trees in big cities can't bring rain which leads to lowering of water table in big cities. 3)due to increase in population which leads to global warming and it effect the water table also.