Page 80 - WoW Class 1 Book 2

Making Air Dirty

Smoke from cars, buses, trucks, etc. makes the air dirty. Smoke
coming out from factories and burning waste also makes the

air dirty.

How does it help...
Planting lots of trees helps in keeping the air clean and fresh.

Let’s Recall

• Air is all around us.

• All living things need air to breathe.
ENVIRONMENTAL STUDIES
• We cannot see air but we can feel it when it moves.

• Air occupies space.

• Moving air is called wind.

• A strong wind can cause a storm.

• A storm can cause a lot of damage.

Let’s Practise

A. Fill in the blanks.

1. The blades of a windmill rotate with the help of ______________
(air/water).

2. We need (air/water) ______________ to breathe.

3. A hot air balloon rises because of the ______________ (hot/cold)

air entering it.

4. Moving air is called ______________ (wind/storm).

5. Trees can get uprooted during a ______________ (wind/storm).

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