Climate Change MCQs Set 21 (200+ Questions with Ansers) Posted on March 24, 2026March 31, 2026Author agropublishers 0 Table of Contents Toggle Climate Change MCQs Set 21 (200+ Questions with Answers)1. Anthropogenic forcing differs from natural forcing because it _______ Is driven by solar variability Is negligible Results from human activities Is periodic 2. Hydroxyl (OH) radicals are often referred to as the atmosphere’s _____________ Energy source Cooling agents Cleansing agents Greenhouse gases 3. Reducing emissions of 1 tonne of N₂O is approximately equivalent to a reduction of how much CO₂ (in CO₂-equivalent, GWP₁₀₀ basis)? 386 tCO₂e 210 tCO₂e 28 tCO₂e 265 tCO₂e 4. Climate variability typically operates over which time scale? Seconds Centuries Years to decades Minutes 5. If nitrous oxide (N₂O) emissions are 2 tonnes, what is the corresponding CO₂-equivalent (GWP₁₀₀ ≈ 265)? 400 tCO₂e 600 tCO₂e 700 tCO₂e 530 tCO₂e 6. Climate change driven imbalance in Earth’s energy budget (radiative imbalance) primarily results in ___________ Rainfall changes Wind formation Accumulation of heat in the climate system Atmospheric pressure changes 7. A positive radiative forcing indicates _____________ Net energy gain by the Earth system No change in energy balance Cooling of the Earth system Net energy loss from the Earth system 8. Permafrost thaw contributes to climate tipping primarily through __________ Reduction in soil respiration Increased albedo Release of CO₂ and CH₄ from previously frozen organic matter Enhanced nitrogen fixation 9. Longwave radiation in the Earth system primarily originates from ______________ Sun Earth’s surface Atmosphere Stars 10. Climate thresholds are important because they can ___________ Trigger abrupt and potentially irreversible changes Stabilize the climate system Reduce greenhouse gas emissions Increase surface albedo Loading … Question 1 of 10Climate Change MCQs Set 21 (200+ Questions with Answers) Climate Change MCQs Set 21 (200+ Questions with Answers) 1. Anthropogenic forcing differs from natural forcing because it _______ Is driven by solar variability Is negligible Results from human activities Is periodic 2. Hydroxyl (OH) radicals are often referred to as the atmosphere’s _____________ Energy source Cooling agents Cleansing agents Greenhouse gases 3. Reducing emissions of 1 tonne of N₂O is approximately equivalent to a reduction of how much CO₂ (in CO₂-equivalent, GWP₁₀₀ basis)? 386 tCO₂e 210 tCO₂e 28 tCO₂e 265 tCO₂e 4. Climate variability typically operates over which time scale? Seconds Centuries Years to decades Minutes 5. If nitrous oxide (N₂O) emissions are 2 tonnes, what is the corresponding CO₂-equivalent (GWP₁₀₀ ≈ 265)? 400 tCO₂e 600 tCO₂e 700 tCO₂e 530 tCO₂e 6. Climate change driven imbalance in Earth’s energy budget (radiative imbalance) primarily results in ___________ Rainfall changes Wind formation Accumulation of heat in the climate system Atmospheric pressure changes 7. A positive radiative forcing indicates _____________ Net energy gain by the Earth system No change in energy balance Cooling of the Earth system Net energy loss from the Earth system 8. Permafrost thaw contributes to climate tipping primarily through __________ Reduction in soil respiration Increased albedo Release of CO₂ and CH₄ from previously frozen organic matter Enhanced nitrogen fixation 9. Longwave radiation in the Earth system primarily originates from ______________ Sun Earth’s surface Atmosphere Stars 10. Climate thresholds are important because they can ___________ Trigger abrupt and potentially irreversible changes Stabilize the climate system Reduce greenhouse gas emissions Increase surface albedo Loading … Question 1 of 10 Climate Change MCQs Set 21 (200+ Questions with Answers)
