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 variability typically operates over which time scale? Seconds Minutes Centuries Years to decades 2. 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 3. Anthropogenic forcing differs from natural forcing because it _______ Results from human activities Is negligible Is driven by solar variability Is periodic 4. Reducing emissions of 1 tonne of N₂O is approximately equivalent to a reduction of how much CO₂ (in CO₂-equivalent, GWP₁₀₀ basis)? 210 tCO₂e 28 tCO₂e 386 tCO₂e 265 tCO₂e 5. Longwave radiation in the Earth system primarily originates from ______________ Atmosphere Stars Sun Earth’s surface 6. Climate change driven imbalance in Earth’s energy budget (radiative imbalance) primarily results in ___________ Rainfall changes Wind formation Atmospheric pressure changes Accumulation of heat in the climate system 7. If nitrous oxide (N₂O) emissions are 2 tonnes, what is the corresponding CO₂-equivalent (GWP₁₀₀ ≈ 265)? 600 tCO₂e 700 tCO₂e 400 tCO₂e 530 tCO₂e 8. Climate thresholds are important because they can ___________ Stabilize the climate system Trigger abrupt and potentially irreversible changes Reduce greenhouse gas emissions Increase surface albedo 9. Permafrost thaw contributes to climate tipping primarily through __________ Enhanced nitrogen fixation Increased albedo Reduction in soil respiration Release of CO₂ and CH₄ from previously frozen organic matter 10. Hydroxyl (OH) radicals are often referred to as the atmosphere’s _____________ Greenhouse gases Energy source Cooling agents Cleansing agents Loading … Question 1 of 10Climate Change MCQs Set 21 (200+ Questions with Answers) Climate Change MCQs Set 21 (200+ Questions with Answers) 1. Climate variability typically operates over which time scale? Seconds Minutes Centuries Years to decades 2. 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 3. Anthropogenic forcing differs from natural forcing because it _______ Results from human activities Is negligible Is driven by solar variability Is periodic 4. Reducing emissions of 1 tonne of N₂O is approximately equivalent to a reduction of how much CO₂ (in CO₂-equivalent, GWP₁₀₀ basis)? 210 tCO₂e 28 tCO₂e 386 tCO₂e 265 tCO₂e 5. Longwave radiation in the Earth system primarily originates from ______________ Atmosphere Stars Sun Earth’s surface 6. Climate change driven imbalance in Earth’s energy budget (radiative imbalance) primarily results in ___________ Rainfall changes Wind formation Atmospheric pressure changes Accumulation of heat in the climate system 7. If nitrous oxide (N₂O) emissions are 2 tonnes, what is the corresponding CO₂-equivalent (GWP₁₀₀ ≈ 265)? 600 tCO₂e 700 tCO₂e 400 tCO₂e 530 tCO₂e 8. Climate thresholds are important because they can ___________ Stabilize the climate system Trigger abrupt and potentially irreversible changes Reduce greenhouse gas emissions Increase surface albedo 9. Permafrost thaw contributes to climate tipping primarily through __________ Enhanced nitrogen fixation Increased albedo Reduction in soil respiration Release of CO₂ and CH₄ from previously frozen organic matter 10. Hydroxyl (OH) radicals are often referred to as the atmosphere’s _____________ Greenhouse gases Energy source Cooling agents Cleansing agents Loading … Question 1 of 10 Climate Change MCQs Set 21 (200+ Questions with Answers)
