2nd Class EVS Weather, Air and Water Use of wind

       Usefulness of wind

The following are the uses of wind:

It is very important for living things as they inhale air to be alive. Most of the living things inhale oxygen and exhale carbon dioxide. While Plants inhale carbon dioxide and exhale oxygen.

It is very important for the growth of plants.

Fresh and cool air is needed for living things to be energetic and active.

Fresh and natural air makes a good environment.

It is used for electricity generation.

Wind is used to fill in balloons, football, wheels of buses, cars, cycles, motorcycles etc.

      Living things cannot ———— without air.

(a) Eat

(b) Live

(c) Drink  

(d) See

Answer: (b)

Explanation

Living things inhale air to be alive. Therefore, option (B) is correct and rest of the options is incorrect.

      Which one of the following is true?

(a) Wind is useless for living organism    

(b) Wind is useless for plants

(c) Wind is useless for human

(d) Wind is the most important factor for the survival of living organism.

Answer: (d)

Explanation 

Wind is the most important factor for the survival of living organism. Therefore/option (D) is correct and rest of the options is incorrect.