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