Chapter -3 (Save the environment)

Back exercise question

Question 1: Write two ways by which Air gets polluted.

Answer: Air gets polluted in the following ways.

· Burning of plastic, garbage and wood.

· Smoke from vehicles and factories.

· Bursting of firecrackers.

· Coughing or sneezing without covering one’s mouth.

(Accept any two of these.)

Question 2: Write two things that cause water pollution.

Answer: Dumping of waste from houses and factories into water bodies, bathing of people and animals in ponds, lakes and rivers, and washing clothes and utensils in water bodies.

(Accept any two of these).

Question 3: Write three ways to control land pollution.

Answer: The three ways to control land pollution are as follows.

· Throw waste in dustbins

· Use natural manure to improve the soil.

· Plant more trees.

Question 4: How can we control noise pollution?

Answer: We can control noise pollution in the following ways.

· Plant trees as they absorb sounds.

· Avoid unnecessary honking

· Watch television or listen to music on a low volume.

Think and answer

Question: Where will you get fresh air- in a park or in a crowded market? Give reasons.

Answer: I will get a fresh air in a park. This is because a park has more trees and more green area. There is also a lot of open space in a park.