Assignment for Air Around Us 1 Questions and Answers Paper

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Question 1

State True or False

(a) Nitrogen supports burning of a candle

(b) Dust particles are always present in air

(c) Water Vapour present in Air supports the water cycle

(d) Birds, insect can fly because of the air

(e) Plants absorb oxygen to prepare the food

(f) Air is primary made of Hydrogen and Helium

Answer:

a) False

b) True

c) True

d) True

e) False

f) False

Question2

Fill in the Blank

1. The process of absorbing carbon dioxide from air and preparing the food by plants is called--------------

2. Air is -------------and not--------------

3. The layer of gases around the earth is called as--------

4. Air occupies------------and has-----------

5. Organism living in soil breathe through ------------

6. Air is primary made of---------and---------

7. Removal of water from plant bodies in the form of vapors is called----------

8. Clothes dry faster when there is----------water vapour in air

Answer:

1) Photosynthesis

2) Odourless, not visible

3) Atmosphere

4) Space, Weight

5) Air present in soil

6) Nitrogen, oxygen

7) Transpiration

8) Less

Question 3:

Match the following

Answer:

Question 4

Crossword

Across

2 This gas is used for treating cancer patient

3 The blanket of gases that surrounds the earth

4 These animals use air dissolved in water for respiration

5 It is colourless and odour less

7 The gas which helps in combustion

8 This process involves utilization of carbon dioxide from air and release of oxygen into the air.

Down

1 The major part in air

2 Air is used by animals for this process

6 The device used to convert wind energy into electrical energy

Answer:

1) Atmosphere

2) Nitrogen

3) Oxygen

4) Windmill

5) Photosynthesis

6) Air

7) Radon

8) Aquatic

9) Respiration