Question

2
Write 'T' for true and 'F' for false
Plants donot keep air fresh and clean
Wind helps kites to fly
Animals too need a home
Internal body parts can be see from outside
We see a shower in the bedroom
Moving air has a lot of force
Food is digested in the stomach
Strong wind has a very high speed​

Answer 1

Answer:

1. false
2. true
3. true
4. false
5. true
6. true
7. true

Answer 2

Answer:

Multiple Choice Questions:

1. Which of the following statements is incorrect?

(a) All living things require air to breathe.

(b) We can feel air but we cannot see it.

(c) Moving air makes it possible to fly a kite.

(d) Air is present everywhere but not in soil.

Solution:

(d): Air is present everywhere but not in soil.

Air is omnipresent in nature and is present everywhere including soil. This can be proved

by a simple activity.

By taking a lump of dry soil in a beaker or a glass, add water to the soil, we can see that

the soil has absorbed the water in the form of bubbles.

2. Wind does not help in the movement of which of the following?

(a) Firki

(b) Weathercock

(c) Ceiling fan

(d) Sailing yacht

Solution:

(c): Ceiling fan

Wind does not help in the movement of ceiling fan since ceiling fan moves by electricity.

3. What is not true about air?

(a) It makes the windmill rotate.

(b) It helps in the movements of aeroplanes.

(c) Birds can fly due to presence of air.

(d) It has no role in water cycle.

Solution:

(d): It has no role in water cycle.

Air plays a major role in water cycle. Water vapours are risen up to form clouds.

4. Mountaineers carry oxygen cylinders with them because

(a) there is no oxygen on high mountains

(b) there is deficiency of oxygen on mountains at high altitude

(c) oxygen is used for cooking

(d) oxygen keeps them warm at low temperature.

Solution:

(b): there is deficiency of oxygen on mountains at high altitude