250+ TOP MCQs on Greenhouse Effects and Answers

Energy & Environment Management Multiple Choice Questions on “Greenhouse Effects”.

1. When do greenhouse gases cause global warming?
a) When their concentration is enhanced
b) When their concentration is decreased
c) When there are no greenhouse gases
d) When greenhouse gas released in balance way
Answer: a
Clarification: Greenhouse gases cause global warming which in the long run threatens the existence of life on Earth. This is the case only when their concentration is enhanced, but these gases are also essential to survive on this planet.

2. How much percent of energy is absorbs from the Sun to Earth?
a) 25%
b) 50%
c) 75%
d) 100%
Answer: b
Clarification: When the Earth receives energy from the Sun, the surface of the Earth only absorbs 50% of it. The radiation absorbed by the atmosphere is radiated again in all direction some radiated towards space and radiated back to the surface of the Earth.

3. What is called for the phenomenon when the radiation absorbed by the atmosphere is re-radiated towards the surface of the Earth?
a) Smog
b) Newton effect
c) Darwin effect
d) Greenhouse effect
Answer: d
Clarification: Greenhouse effect is a natural phenomenon that helps in keeping the temperature at the surface warm and balanced, which is suitable for all organisms. Because of greenhouse gas, the radiations are re-radiated.

4. Which of the following result obtain due to cutting down of trees?
a) Providing more fresh oxygen
b) Providing more pure water
c) Cause greenhouse effect
d) Cause increase in the rain
Answer: c
Clarification: Forest which plays an important role in maintaining the balance of nature by absorbing the excess carbon dioxide present in the atmosphere. Cutting down of trees increase in carbon dioxide level, eventually, cause greenhouse effect.

5. Which is the most abundantly found greenhouse gas?
a) Carbon dioxide
b) Water vapor
c) Methane
d) Nitrous oxide
Answer: b
Clarification: Water vapor is the most abundantly found greenhouse gas. It constituting around 35-70% of all the gases contributing to greenhouse effect. Increase in temperature results in a relatively high presence of water vapor in the atmosphere.

6. Population growth indirectly contributes for greenhouse effect.
a) True
b) False
Answer: a
Clarification: Population growth is an indirect contributor and one of the major causes of the greenhouse effect. Due to increase in population there is an increase in deforestation and increasing in industrial processes. This results in the increase of greenhouse gas which thereby causes greenhouse effect.

7. Which of the following is not a greenhouse gas?
a) Water vapor
b) Carbon dioxide
c) Methane
d) Ethane
Answer: d
Clarification: Ethane is not a greenhouse gas among the above options. Water vapor is the most abundantly found greenhouse gas with consti9tute around 35-70%, carbon dioxide constitutes around 9-26% and methane constitute around 4-9%.

8. When did greenhouse effect discovered?
a) 1814
b) 1824
c) 1854
d) 1884
Answer: c
Clarification: The greenhouse effect was first discovered by Joseph Fourier in 1924. The greenhouse effect is a natural process that is thousands of years old. Apart from Joseph Fourier it is experimentally verified by John Tyndall in 1861 and quantified in the year 1894 BY Svante Arrhenius.

9. Why the temperature inside the car is much warmer than the outside temperature when the car that has been left parked in the sun for a couple of hours?
a) Due to air pollution
b) Due to smog
c) Due to sudden climate change
d) Due to greenhouse effect
Answer: d
Clarification: When we opened we open the door of a car that has been left parked in the sun for a couple of hours, we notice that the temperature inside the car is much warmer than outside. This is due to greenhouse effect.

10. Taking the example of a car parked in the sun for a few hours, which of the following action takes place?
a) Sunlight once entered the car through windows is partially converted into heat
b) Sunlight once entered the car through windows is partially converted into electricity
c) Sunlight once entered the car through windows is completely absorbed by the car
d) Sunlight once entered the car through windows is partially converted into wind energy
Answer: a
Clarification: The windows of the car allow the sunlight to enter into the car. This light is then partially converted into heat. However, these same windows do not allow the heat inside the car to pass through as easily as light.

11. For greenhouse effect greenhouse gases interacts with which one of the following options?
a) Wind’s energy
b) Sun’s energy
c) Atmosphere pressure
d) Pollution in the atmosphere
Answer: b
Clarification: The greenhouse effect is caused due to the interaction of the sun’s energy with greenhouse gases such as methane, carbon dioxide, nitrous oxide and fluorinated gases in the Earth’s atmosphere. The greenhouse effect increases the temperature of the Earth.

12. Which is the main feedback gas of the greenhouse effect?
a) Water vapor
b) Carbon dioxide
c) Methane
d) Nitrous oxide
Answer: a
Clarification: The main feedback gas of the greenhouse effect is water vapor. Water vapor is a highly active component of the climate system that responds rapidly to changes in conditions. Thus the impact of the greenhouse effect is primarily circulated through water vapor and it acts as a fast feedback.

13. Greenhouse is made up of_______________
a) Bricks
b) Glass
c) Steel
d) Copper
Answer: b
Clarification: A greenhouse is a house that is made up of glass. It has many doors and roof which are made up of glass. A greenhouse remains warm during the winter. It is used by the people in colder regions where it is difficult to grow plants under extreme cold temperature.

14. Greenhouse effect occurs to bodies other than Earth.
a) True
b) False
Answer: a
Clarification: The greenhouse effect on Titan has an anti-greenhouse effect. The greenhouse effect on Venus is large because its dense atmosphere consists mainly of carbon dioxide. Because of the evaporation of nitrogen, Pluto is colder than expected.