Climate Change — Homi Bhabha Exam Biology MCQs with Solutions
Free Homi Bhabha Exam Biology Climate Change MCQs with step-by-step solutions (6 questions). Part of Ecosystem & Environmental Management. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Climate Change · medium · theory
The trapping of heat near the Earth's surface by certain gases is called the:
A. photoelectric effect
B. greenhouse effect ✓ Correct
C. cooling effect
D. ozone effect
Solution: Greenhouse gases trap heat, keeping the Earth warm — the greenhouse effect.
Q2 — Climate Change · medium · theory
The main greenhouse gas responsible for global warming is:
A. oxygen
B. carbon dioxide ✓ Correct
C. argon
D. nitrogen
Solution: Carbon dioxide (along with methane) is a major greenhouse gas driving global warming.
Q3 — Climate Change · hard · theory
The gradual rise in the average temperature of the Earth is called:
A. condensation
B. global warming ✓ Correct
C. acid rain
D. eutrophication
Solution: Global warming is the increase in Earth's average temperature due to greenhouse gases.
Q4 — Climate Change · hard · theory
The depletion of the ozone layer is caused mainly by:
A. chlorofluorocarbons (CFCs) ✓ Correct
B. oxygen
C. water vapour
D. carbon dioxide
Solution: CFCs released from refrigerants and sprays break down ozone in the stratosphere.
Q5 — Climate Change · medium · theory
A likely effect of global warming is:
A. cooling of the oceans
B. no change in climate
C. thicker ice caps
D. melting of glaciers and a rise in sea level ✓ Correct
Solution: Rising temperatures melt glaciers and polar ice, raising sea levels.
Q6 — Climate Change · hard · theory
Which of the following would help to REDUCE global warming?
A. Increasing use of CFCs
B. Planting more trees and using renewable energy ✓ Correct
C. Burning more fossil fuels
D. Cutting down forests
Solution: Afforestation absorbs CO₂ and clean energy cuts emissions, both reducing global warming.