Hello students! In this chapter, we learned about the Earth’s atmosphere. The atmosphere is a blanket of air that surrounds our planet. It is made up of many gases, with nitrogen and oxygen being there in plenty. The atmosphere protects people on earth from the sun’s harmful rays and helps keep the Earth’s temperature perfect for living things. There are 5 major layers of atmosphere – Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere. Each layer has its own unique features. Let’s now test our knowledge with some questions!
First we are going to solve 20 MCQ questions for the chapter. Once you are done, you can attempt 10 fill in the blanks questions to futher strenthen your knowledge of the chanpter.
Class 7 Geography Chapter 4 MCQS
1. What is the most plentiful gas in the Earth’s atmosphere?
a) Oxygen
b) Carbon Dioxide
c) Nitrogen
d) Hydrogen
Answer:
c) Nitrogen
2. What gas is responsible for the greenhouse effect by trapping heat radiated from the Earth?
a) Oxygen
b) Carbon Dioxide
c) Nitrogen
d) Helium
Answer:
b) Carbon Dioxide
3. Which gas is essential for human respiration?
a) Nitrogen
b) Carbon Dioxide
c) Oxygen
d) Argon
Answer:
c) Oxygen
4. Which layer of the atmosphere contains the ozone layer?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere
Answer:
b) Stratosphere
5. In which layer of the atmosphere do most weather phenomena occur?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Exosphere
Answer:
a) Troposphere
6. What is the term for the average weather condition of a place over a long period?
a) Weather
b) Climate
c) Atmosphere
d) Temperature
Answer:
b) Climate
7. What instrument is used to measure atmospheric pressure?
a) Thermometer
b) Barometer
c) Anemometer
d) Hygrometer
Answer:
b) Barometer
8. What is the movement of air from high-pressure areas to low-pressure areas called?
a) Cyclone
b) Breeze
c) Wind
d) Storm
Answer:
c) Wind
9. Which of the following is a local wind that blows in northern India during summer?
a) Monsoon
b) Westerlies
c) Loo
d) Trade Winds
Answer:
c) Loo
10. What is the layer of the atmosphere where meteorites burn up on entering from space?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere
Answer:
c) Mesosphere
11. Which layer of the atmosphere helps in radio transmission?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Ionosphere
Answer:
d) Ionosphere
12. What is the uppermost layer of the atmosphere called?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Exosphere
Answer:
d) Exosphere
13. What is the term for the incoming solar energy intercepted by the Earth?
a) Insolation
b) Radiation
c) Reflection
d) Absorption
Answer:
a) Insolation
14. What is the name for the amount of water vapor in the air at any given time?
a) Humidity
b) Precipitation
c) Condensation
d) Evaporation
Answer:
a) Humidity
15. What is the term for precipitation that comes down to Earth in liquid form?
a) Snow
b) Sleet
c) Hail
d) Rain
Answer:
d) Rain
16. Which type of rainfall occurs when moist air is forced to rise over a mountain range?
a) Convectional rainfall
b) Cyclonic rainfall
c) Orographic rainfall
d) Relief rainfall
Answer:
c) Orographic rainfall
17. Which gas in the atmosphere occupies only 0.03% by volume?
a) Oxygen
b) Carbon Dioxide
c) Nitrogen
d) Argon
Answer:
b) Carbon Dioxide
18. Which form of precipitation is not in liquid form?
a) Rain
b) Snow
c) Drizzle
d) Hail
Answer:
b) Snow
19. What is the main cause of global warming?
a) Increased levels of oxygen
b) Decreased levels of nitrogen
c) Increased levels of carbon dioxide
d) Decreased levels of argon
Answer:
c) Increased levels of carbon dioxide
20. Which layer of the atmosphere is free from clouds and ideal for flying aeroplanes?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Exosphere
Answer:
b) Stratosphere
Class 7 Geography Chapter 4 Fill in the Blanks with Answers
1. The Earth is surrounded by a huge blanket of air called the ___.
Answer:
atmosphere
2. The two gases that make up the bulk of the atmosphere are ___ and ___.
Answer:
Nitrogen, Oxygen
3. The gas that creates the greenhouse effect by trapping heat is ___.
Answer:
Carbon Dioxide
4. The atmosphere is divided into five layers: Troposphere, Stratosphere, ___, Thermosphere, and Exosphere.
Answer:
Mesosphere
5. The layer of the atmosphere where weather phenomena like rainfall and fog occur is the ___.
Answer:
Troposphere
6. The layer of the atmosphere that contains the ozone layer is the ___.
Answer:
Stratosphere
7. The degree of hotness and coldness of the air is known as ___.
Answer:
temperature
8. Air pressure is the pressure exerted by the ___ of air on the Earth’s surface.
Answer:
weight
9. The movement of air from high-pressure areas to low-pressure areas is called ___.
Answer:
wind
10. The amount of water vapor in the air at any time is known as ___.
Answer:
humidity
