Greenhouse effect and climate change Quiz
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5 questions, one answer each
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1. Which gas, released by cattle and rice paddies, is a greenhouse gas?
- A. Methane
- B. Nitrogen
- C. Argon
- D. Oxygen
2. What does the enhanced greenhouse effect describe?
- A. The natural warming that keeps the Earth at 15 °C
- B. Extra warming caused by human activities increasing greenhouse gas concentrations
- C. Cooling caused by volcanoes
- D. The reflection of sunlight by clouds
3. Air bubbles in ice cores show about 280 ppm of CO₂ for 1750 and 420 ppm today. What is the increase?
- A. 280 ppm
- B. 700 ppm
- C. 140 ppm
- D. 14 ppm
4. Which is the best justification for saying that planting trees alone cannot solve climate change?
- A. Fossil fuels release CO₂ faster than new trees can absorb it, and stored carbon is released when trees burn or rot
- B. Trees release more CO₂ than they absorb
- C. Trees do not photosynthesise
- D. Trees only grow in polar regions
5. A website claims: "Temperatures and CO₂ both rose, so CO₂ must be the only cause." What is the main weakness of this claim?
- A. It uses ice-core data
- B. It assumes correlation proves cause and ignores other possible factors
- C. It mentions temperature
- D. It refers to carbon dioxide