Fossil Fuels quiz
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Which fossil fuel releases the most CO₂ for the same energy?
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More questions about Fossil Fuels
These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.
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What did most of the world's oil form from?
Answer: Plankton
Why: Dead plankton sank into oxygen-poor sediment, and heat and pressure over millions of years turned it into oil.
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In what year did Arab states embargo oil after the Yom Kippur War?
Answer: 1973
Why: Oil prices nearly quadrupled, from about $2.90 to $11.65 a barrel by January 1974.
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How many times stronger is methane than CO₂ over 20 years, per ton?
Answer: About 80 times
Why: Methane breaks down in about 12 years, so over 100 years its multiplier falls to about 30.
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Which source supplies the most total energy worldwide?
Answer: Oil
Why: Road transport alone accounts for about 45% of the world's oil demand.
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Which tanker's 1989 spill fouled Alaska's coast?
Answer: Exxon Valdez
Why: It released nearly 11 million gallons of crude oil and affected more than 1,300 miles of shoreline.
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Where are the world's largest proven oil reserves?
Answer: Venezuela
Why: Most of Venezuela's oil is thick, extra-heavy crude from the Orinoco Belt.
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