CBSE Class 4 Science Air MCQs

Question: Air is a ____________ of gases.

a) mixture

b) both

c) compound

d) all of these

Answer: mixture

Question: A thick blanket of air surrounding us is called

a) atmosphere

b) none of these

c) nitrogen

d) cloud

Answer: atmosphere

Question: Without the ____________ there would be no life on earth

a) atmosphere

b) road

c) river

d) all of these

Answer: atmosphere

Question: The amount of _______ in air varies from place to place and from time to time.

a) water vapour

b) dusb vt

c) smoke

d) none of these

Answer: water vapour

Question: The amount of water vapour in air is called

a) humidity

b) none of these

c) moisture

d) both

Answer: humidity

Question: Our city’s air has ____________ humidity in the monsoon.

a) high

b) none of these

c) low

d) both

Answer: high

Question: You cannot see air 35r contains ____________ oxygen than inhaled air.

a) less

b) none of these2.1

c) more

d) both

Answer: less

Question: Dust and smoke make the air dirty. It is called

a) air pollution

b) air filtration

c) both

d) none of these

Answer: air pollution

Question: The substances that causes air pollution are called

a) pollutants

b) dirty things

c) both

d) none of these

Answer: pollutants

Question: ____________ is air pollutant

a) none of these

b) stem

c) root

d) leaves

Answer: none of these

Question: Electric vehicles producers ____________ air pollutants.

a) no

b) none of these

c) more

d) less

Answer: no

Question: Air pollution mostly harm our ____________ system

a) respiratory

b) digestive

c) excretory

d) none of these

Answer: respiratory

Question: Which disease is caused due to air pollution?

a) asthma

b) anaemia

c) head ache

d) none of these

Answer: asthma

Question: Burning of plastics, crackers, vehicles are responsible for ____________ pollution.

a) air

b) water

c) noise

d) none of these

Answer: air

Question: Plant more and more trees because it ____________ air pollution.

a) reduce

b) none of these

c) increase

d) both

Answer: reduce

Question: Reduce, ____________ , and Recycle waste materials to control air pollution.

a) Reuse

b) none of these

c) Restore

d) Remain

Answer: Reuse

Question: Public transport, walking, cycling are also ____________ to control air pollution

a) helped

b) both

c) related

d) none of these

Answer: helped

Question: Water vapours ____________ the air.

a) do not pollute

b) none of these

c) pollutes

d) both

Answer: do not pollute

Question: Buy goods that have less packaging because it ____________ garbage.

a) reduce

b) none of these

c) increase

d) both

Answer: reduce