Water

- Water is essential for life.

- Water which is fit for human consumption is known as Fresh water or Potable water.

- Only 2.6% of total water is fresh water.

- Only 0.01% of the total water reaches humans and animals.

- Water Cycle: The cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation as rain and snow, drainage in streams and rivers, and return to the atmosphere by evaporation and transpiration.

- Water Conservation: It is the wise and judicious use of water.

- Ways of conserving water:

- (i) Get all leaking taps repaired.

(ii) Use a bucket for taking bath instead of a shower.

(iii) Collect rainwater and use it for gardening and recharging ground water.

(iv) Wash your cycles, cars, etc. with a bucket of water instead of pipes.

(v) Instead of washing the floor use a mop.

Importance of Water:
(i) Digestion of food takes place in the stomach when food is mixed with water.

(ii) Important medium for the transportation of food, oxygen and carbon dioxide in the body.

- (iii) Water is used to produce electricity.

(iv) Water is essential for the germination of seeds.

(v) Water helps in maintaining the body temperature.

Excess of water: When it rains or snow, some of the water is retained by soil. Its caused flood. It effects by damage property and endanger the lives of humans and animals. Rapid run-off causes soil erosion.

- Lack of water: It is the lack of sufficient available water resources to meet water needs within a region. It cause drought like condition. It effect by acute water crisis, crop failure, loss of life in all forms due to starvation.