Class 07 Social Science Air CBSE Questions & Answers

Class 7 · Social Science Air

This is Social Science class 07 Social Science Air CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Our earth is surrounded by a huge blanket of
  • A
    Water
  • B
    Air
    Correct
  • C
    Sand
  • D
    Plants
2
Which two gases make up the bulk of the atmosphere
  • A
    Nitrogen and Hydrogen
  • B
    Carbon and oxygen
  • C
    Nitrogen and oxygen
    Correct
  • D
    Carbon and Hydrogen
3
Cold air is ____ than hot air
  • A
    Small and light
  • B
    Denser and heavy
    Correct
  • C
    Less denser and light
  • D
    Small and heavy
4
Which is the second most plentiful gas in the air
  • A
    Hydrogen
  • B
    Nitrogen
  • C
    Oxygen
    Correct
  • D
    Argon
5
Green plants use ____ to make their food and release ___
  • A
    oxygen, helium
  • B
    carbon dioxide, hydrogen
  • C
    carbon dioxide, oxygen
    Correct
  • D
    helium, hydrogen
6
Which of the following is not the layer of atmosphere
  • A
    Stratosphere
  • B
    Hydrosphere
    Correct
  • C
    Mesosphere
  • D
    Troposphere
7
All the weather phenomena like rainfall, fog and hailstorm occur in which layer
  • A
    Troposphere
    Correct
  • B
    Thermosphere
  • C
    Mesosphere
  • D
    Stratosphere
8
Which layer is almost free from clouds
  • A
    Troposphere
  • B
    Stratosphere
    Correct
  • C
    Thermosphere
  • D
    Mesosphere
9
The air breathe exist in
  • A
    Mesosphere
  • B
    Thermosphere
  • C
    Stratosphere
  • D
    Troposphere
    Correct
10
Jet planes flying in the sky leave a ____trail behind them
  • A
    Black
  • B
    Blue
  • C
    Grey
  • D
    White
    Correct
11
Meteorites burn up in this layer on entering from the space
  • A
    Stratosphere
  • B
    Troposphere
  • C
    Mesosphere
    Correct
  • D
    Thermosphere
12
____ is this hour-to-hour, day to day condition of the atmosphere
  • A
    Season
  • B
    Climate
  • C
    Weather
    Correct
  • D
    Wind
13
Instrument measure the amount of rainfall
  • A
    Rainosphere
  • B
    Raingauge
    Correct
  • C
    Rainwave
  • D
    Ranometer
14
The degree of hotness and coldness of the air is known as
  • A
    Temperature
    Correct
  • B
    Season
  • C
    Climate
  • D
    Weather
15
Composition of air
  • A
    78% Nitrogen, 21% Oxygen, 1%Other gases
    Correct
  • B
    76% Nitrogen, 21% Oxygen, 3%Other gases
  • C
    75% Nitrogen, 21% Oxygen, 4%Other gases
  • D
    77% Nitrogen, 21% Oxygen, 2%Other gases