Trees clean the air. Trees absorb pollutants and harmful gases and filter particulates out of the air by trapping them in their leaves and bark. They absorb carbon dioxide from the environment and release oxygen into the environment. So, we should not cut trees and plants.

Awareness SCIENCE BOOK 2>Chapter 19 - Our Environment>Activity

EASY

2nd CBSE

IMPORTANT

Earn 100

What things in our environment make the air dirty?

Important Questions on Our Environment

MEDIUM

2nd CBSE

IMPORTANT

Awareness SCIENCE BOOK 2>Chapter 19 - Our Environment>Activity

What cleans the air?

MEDIUM

2nd CBSE

IMPORTANT

Awareness SCIENCE BOOK 2>Chapter 19 - Our Environment>Activity

The air in a city has become dirty. It has become difficult to breathe. What will you tell the people of the city to do, to clean the air?

MEDIUM

2nd CBSE

IMPORTANT

Awareness SCIENCE BOOK 2>Chapter 19 - Our Environment>Activity

Wash your hands with soap and water and collect the water in a large bowl.

Question Image

Observe the water. Has it become dirty?

Where did the dirt come from?

When you use soap and water to clean your body, the water becomes dirty. When you flush your toilet, water takes away the dirt. Where do you think all this dirty water goes?

EASY

2nd CBSE

IMPORTANT

Awareness SCIENCE BOOK 2>Chapter 19 - Our Environment>Exercises>Q a

We should plant more _____ as they clean the air.

EASY

2nd CBSE

IMPORTANT

Awareness SCIENCE BOOK 2>Chapter 19 - Our Environment>Exercises>Q b

Fill in the blank with a suitable word:

Smoke makes the _____ (air/fire) dirty.

EASY