Air

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Quiz Description:

Test your knowledge of the Earth's atmosphere with this comprehensive 30-question MCQ quiz on Class 7 Geography Chapter 4: Air. Strictly aligned with the NCERT syllabus, this test covers critical topics including the composition of air, layers of the atmosphere (Troposphere to Exosphere), weather instruments, and wind systems.

Maximum Marks: 30 (1 mark per question)

Name

1. Which gas makes up the largest percentage of the Earth's atmosphere?

A. Nitrogen

B. Oxygen

C. Carbon Dioxide

D. Argon

None

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2. Which gas is primarily responsible for the 'Greenhouse Effect' by trapping heat radiated from the earth?

A. Oxygen

B. Hydrogen

C. Nitrogen

D. Carbon Dioxide

None

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3. In which layer of the atmosphere do almost all weather phenomena like rainfall, fog, and hailstorm occur?

A. Stratosphere

B. Troposphere

C. Mesosphere

D. Thermosphere

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4. Which layer of the atmosphere contains the ozone layer that protects us from harmful sun rays?

A. Troposphere

B. Mesosphere

C. Stratosphere

D. Exosphere

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5. What happens to meteorites when they enter the Mesosphere from space?

A. They freeze

B. They burn up

C. They bounce back

D. They stop moving

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6. The Ionosphere is a part of which atmospheric layer?

A. Stratosphere

B. Mesosphere

C. Thermosphere

D. Exosphere

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7. Which represents the uppermost layer of the atmosphere where air is very thin?

A. Mesosphere

B. Exosphere

C. Thermosphere

D. Stratosphere

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8. What is the correct definition of 'Weather'?

A. The movement of air from high pressure to low pressure

B. The hour-to-hour, day-to-day condition of the atmosphere

C. The amount of insolation received by the earth

D. The average weather condition of a place over a long period

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9. The average weather condition of a place for a longer period of time represents its:

A. Humidity

B. Climate

C. Weather

D. Temperature

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10. Which instrument is used to measure atmospheric pressure?

A. Thermometer

B. Rain Gauge

C. Wind Vane

D. Barometer

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11. What is 'Insolation'?

A. The outgoing heat from the earth

B. The incoming solar energy intercepted by the earth

C. The moisture present in the air

D. The pressure exerted by the air

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12. How does the amount of insolation change as we move from the equator towards the poles?

A. It remains the same

B. It increases

C. It decreases

D. It first decreases then increases

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13. What is the standard unit of measuring temperature?

A. Fahrenheit

B. Kilogram

C. Millibar

D. Degree Celsius

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14. Air moves from a region of ________ pressure to a region of ________ pressure.

A. High, High

B. Low, Low

C. Low, High

D. High, Low

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15. Which of the following creates a low-pressure area?

A. Hot air rising

B. Cloudless skies

C. Cold air sinking

D. Dry air settling

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16. Low pressure is typically associated with which type of weather?

A. Calm and stable air

B. Clear and sunny skies

C. Cloudy skies and wet weather

D. Dry and cold weather

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17. What is the movement of air usually called?

A. Wind

B. Storm

C. Draft

D. Breeze

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18. Which of these is NOT one of the three main types of winds?

A. Solar winds

B. Permanent winds

C. Seasonal winds

D. Local winds

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19. The Trade Winds, Westerlies, and Easterlies are examples of:

A. Permanent winds

B. Local winds

C. Monsoon winds

D. Seasonal winds

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20. Which type of wind changes its direction in different seasons?

A. Seasonal wind

B. Permanent wind

C. Local wind

D. Westerlies

None

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21. The hot and dry local wind blowing in the northern plains of India is called:

A. Mistral

B. Sea Breeze

C. Loo

D. Chinook

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22. Moisture in the air at any time is known as:

A. Condensation

B. Humidity

C. Evaporation

D. Precipitation

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23. When water vapor rises, it starts cooling. The water vapor condenses causing the formation of:

A. Droplets of water

B. Gases

C. Wind

D. Heat

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24. Precipitation that comes down to the earth in liquid form is called:

A. Sleet

B. Rain

C. Hail

D. Snow

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25. Which of the following is NOT a form of precipitation?

A. Hail

B. Rain

C. Fog

D. Snow

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26. Based on the mechanism, which of the following is NOT a type of rainfall?

A. Cyclonic rainfall

B. Seasonal rainfall

C. Orographic rainfall

D. Convectional rainfall

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27. Why do jet planes flying in the sky leave a white trail behind them?

A. It is a special chemical released

B. It is dust kicked up by the plane

C. The moisture from their engines condenses

D. It is smoke from the engine

None

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28. Which instrument shows the direction of the wind?

A. Rain Gauge

B. Wind Vane

C. Barometer

D. Thermometer

None

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29. Cyclonic rainfall is caused by:

A. Moist air striking a mountain

B. Evaporation from the ocean

C. Warm air rising rapidly

D. Meeting of warm and cold air masses

None

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30. Global warming is primarily caused by an increase in which gas?

A. Oxygen

B. Carbon Dioxide

C. Nitrogen

D. Argon

None

Hint

1 out of 6

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