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Question 1: Which gas is the most abundant greenhouse gas in Earth's atmosphere?
- Carbon dioxide
- Water vapor
- Nitrous oxide
- Methane
Answer: B. Water vapor
Explanation: While carbon dioxide gets a lot of attention, water vapor is actually the most abundant greenhouse gas, naturally amplifying the greenhouse effect in our atmosphere.
Question 2: What is the primary cause of ocean acidification?
- Absorption of CO2
- Increased solar radiation
- Rising water temperatures
- Plastic pollution
Answer: A. Absorption of CO2
Explanation: When the ocean absorbs excess carbon dioxide from the atmosphere, it undergoes a chemical reaction that lowers the pH of the water, leading to acidification.
Question 3: Which international treaty aims to limit global warming to well below 2 degrees Celsius?
- Kyoto Protocol
- Montreal Protocol
- Paris Agreement
- Geneva Convention
Answer: C. Paris Agreement
Explanation: The Paris Agreement, adopted in 2015, is a landmark international accord that brings nations together to combat climate change and accelerate climate action.
Question 4: Which of these is considered a 'fossil fuel'?
- Wind power
- Natural gas
- Solar energy
- Geothermal energy
Answer: B. Natural gas
Explanation: Natural gas is a fossil fuel formed from the remains of ancient marine organisms, unlike renewable sources like solar, wind, or geothermal energy.
Question 5: What does the IPCC stand for in climate science?
- International Policy on Climate Change
- International Program for Carbon Cycles
- Institute for Planet and Climate Control
- Intergovernmental Panel on Climate Change
Answer: D. Intergovernmental Panel on Climate Change
Explanation: The Intergovernmental Panel on Climate Change (IPCC) is the UN body responsible for assessing the science related to climate change and providing policy guidance.
Question 6: Which greenhouse gas is significantly more potent than CO2 at trapping heat?
- Methane
- Argon
- Oxygen
- Nitrogen
Answer: A. Methane
Explanation: Methane is a highly potent greenhouse gas; while it stays in the atmosphere for a shorter time than CO2, it traps much more heat per molecule.
Question 7: What is the main process that removes carbon dioxide from the atmosphere naturally?
- Photosynthesis
- Evaporation
- Respiration
- Condensation
Answer: A. Photosynthesis
Explanation: Through photosynthesis, plants and trees absorb carbon dioxide from the air and convert it into oxygen and organic matter, acting as a vital carbon sink.
Question 8: Which of these is a major indicator of global warming?
- Increased volcanic activity
- Rising sea levels
- More frequent eclipses
- Stable ocean currents
Answer: B. Rising sea levels
Explanation: Rising sea levels are a direct consequence of global warming, caused by both the melting of land-based ice and the thermal expansion of warming ocean water.
Question 9: Which sector is typically the largest source of global greenhouse gas emissions?
- Forestry
- Agriculture
- Waste management
- Energy production
Answer: D. Energy production
Explanation: The energy sector, which includes electricity, heat, and transport, is the largest contributor to global greenhouse gas emissions due to fossil fuel combustion.
Question 10: What is the 'greenhouse effect'?
- A cooling process
- Solar flare reflection
- Heat trapping by gases
- Ozone layer depletion
Answer: C. Heat trapping by gases
Explanation: The greenhouse effect is the process where certain gases in the atmosphere trap heat from the sun, keeping the Earth warm enough to support life.