Science [1 Marks Each] QUE - ANS

Ocean and sea.

Yes, the water seems to disappear. It disappears first from the plate kept in the sunlight. The sun is the source of heat for evaporation.

• Water regulates body temperature by the process of respiration and evaporation.
• All metabolic reactions in the body take place in aQuestionueous medium.
• It transports minerals and food materials in plant’s and animal’s body.

Rivers originating from the Himalayas do not dry up during summers because they continue to get water from the melting snow on the mountains.

We need water for so many activities like cook food, clean utensils, bath, wash cloth, clean floor, toilet works, brushing, and most important drinking.

No rainfall for a year or more may lead to drought in the region.

Continuous process.

The sowing of many crops depends on the arrival of monsoon.

No, we cannot use the water in the oceans and seas for drinking and other domestic agricultural and industrial needs because it has much salts dissolved in.

Evaporation and transpiration.

The water which is suitable for drinking is called potable water.

Sunlight.

Limited.

Activities shown in the above figure are:

1. Washing clothes.
2. Bathing.

Water in which many salts are dissolved.

Monsoon season.

Epidemic refers to the disease that spreads over a large population of distant areas, e.g., cholera, plague, etc.

Overuse of groundwater is the reason for decrease in water table.

Fog appearing on a cold winter morning. (Condensation).

Evaporation is endothermic process.