This set of Class 12 Biology Chapter 16 Multiple Choice Questions & Answers (MCQs) focuses on “Environmental Issues – Greenhouse Effect and Global Warming”.
1. From which phenomenon is the term ‘Greenhouse effect’ derived?
a) That occurs in a boathouse
b) That occurs in a greenhouse
c) That occurs in a blue house
d) That occurs in a house
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Explanation: A greenhouse, also called a glasshouse is a building made of transparent material, in which plants such as flowers and vegetables requiring regulated climatic conditions are grown. The word greenhouse gives rise to the term ‘Greenhouse effect’.
2. What is a small glasshouse used for growing plants especially during winter called?
a) Greenhouse
b) Lakehouse
c) Boathouse
d) Treehouse
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Explanation: A building made of transparent material, in which plants requiring regulated climatic conditions are grown is called a greenhouse. In this, the plants are grown especially during winters.
3. In a greenhouse the glass panel lets the light in, but what is not escaped?
a) Light
b) Heat
c) Energy
d) Air
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Explanation: A greenhouse is a building made of transparent material in which plants requiring regulated climatic conditions are grown. It has a glass panel that allows the entry of light but does not allow the departure of light.
4. What helps in warming the greenhouse?
a) Light
b) Energy
c) Plants
d) Heat
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Explanation: The plants such as flowers and vegetables requiring regulated climatic conditions are grown in a greenhouse that is made up of transparent material. The heat is not allowed to escape out from the greenhouse that warms the internal environment.
5. Which naturally occurring phenomenon is responsible for heating of Earth’s surface and atmosphere?
a) Eutrophication
b) Bio-magnification
c) Greenhouse effect
d) Cooking
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Explanation: The naturally occurring phenomenon is responsible for heating of Earth’s surface and atmosphere due to the radiation from a planet’s atmosphere is called the greenhouse effect. It makes the atmosphere of Earth comfortable to live.
6. Which gases are commonly known as greenhouse gases?
a) Nitrogen
b) Carbon dioxide
c) Chlorine
d) Oxygen
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Explanation: The gases that lead to the heating of Earth’s surface and atmosphere due to the radiation from a planet’s atmosphere are known as greenhouse gases. They are responsible for the greenhouse effect. Some gases such as carbon dioxide, methane, nitrous oxide, etc.
7. The given diagram shows the contribution of greenhouse gases. Which gas contributes maximum to the greenhouse effect?
a) Methane
b) CFC
c) Nitrous oxide
d) Carbon dioxide
View Answer
Explanation: The gases that lead to the heating of Earth’s surface and atmosphere due to the radiation from a planet’s atmosphere are known as greenhouse gases. They are responsible for the greenhouse effect. According to the given diagram, carbon dioxide contributes maximum to the greenhouse effect.
8. The given diagram shows the contribution of greenhouse gases. Which gas contributes a minimum to the greenhouse effect?
a) Methane
b) CFC
c) Nitrous oxide
d) Carbon dioxide
View Answer
Explanation: The greenhouse gases are those that lead to the heating of Earth’s surface and atmosphere due to the radiation from a planet’s atmosphere and are responsible for the greenhouse effect. According to the given diagram, nitrous oxide contributes a minimum to the greenhouse effect.
9. What does the increase in the level of greenhouse gases lead to?
a) No change in ecosystem cycles
b) Proper plant growth
c) Proper rainfall
d) Global warming
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Explanation: Global warming is the phenomenon occurring due to an increase in the level of greenhouse gases. This leads to considerable heating and an increase in temperature of Earth leading to deleterious changes in the environment. This causes odd climatic changes.
10. Which one of the following ways can be used to control global warming?
a) Increasing deforestation
b) Reducing efficiency of energy usage
c) Reducing the use of fossil fuel
d) Increasing the growth of human population
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Explanation: The phenomenon occurring due to an increase in the level of greenhouse gases is known as global warming. This leads to an increase in Earth’s temperature and leading to deleterious changes in the environment. This can be controlled by reducing the use of fossil fuels.
11. Which one of the following ways can be used to control global warming?
a) Increasing the growth of human population
b) Planting trees
c) Increasing the use of fossil fuel
d) Increasing deforestation
View Answer
Explanation: The increase in temperature of Earth due to an increase in the level of greenhouse gases is known as global warming. This leads to various changes in the environment. This can be controlled by planting trees and afforestation.
Sanfoundry Global Education & Learning Series – Biology – Class 12.
To practice all chapters and topics of class 12 Biology, here is complete set of 1000+ Multiple Choice Questions and Answers.
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- Practice Class 12 - Chemistry MCQs
- Practice Class 12 - Physics MCQs
- Practice Class 12 - Mathematics MCQs
- Check Class 12 - Biology Books
- Practice Class 11 - Biology MCQs
