Question

I. Tick the correct answer.
1. The major part of the air is constituted by
(a) Hydrogen (b) argon (c) water vapour (d) nitrogen
2. Which of the following gas helps in burning?

(a) nitrogen (b) Oxygen (c) carbon dioxide (d) carbon monoxide

3. Which is not a property of air?

(a) It is transparent (b) it occupies space (c)it is opaque

(d) it is colourless

4.The burning of fuel releases ________________

a) oxygen b) nitrogen c) carbon dioxide d) argon

5. The wind does not help in the movement of which of the following?

a) fan b) firki c) windmill d) kite

II. Fill in the blanks

1.The layer of air that surrounds the earth is called _________________.

2. Air in motion is called ________________.

3. A ______________shows the direction in which the air is moving at that
place.

4 .Plants give out oxygen during a process called _____________.

5. Nitrogen is needed by plants to make _________________.

III. Write true or false

1 Oxygen supports burning process. ( )

2.Air does not help in the dispersal of seeds. ( )

3.Smoke is produced by the burning of fuels. ( )

4. Nitrogen and water vapour make up 99% of air. ( )

5. Air is transparent. ( )

lV. Answer the following questions.

1. Name the major component of air.
2. State any two properties of air.
3. How will you show that air supports burning?
4. Why do policemen regulating traffic at a crowded city road


plz give all answers

Answer 1

Answer:

1 ka c 2k ka c 3 ka d 4 ka c 5 ka b