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