Energy Resources quiz
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Which fossil fuel formed from swamp plants under heat and pressure?
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More questions about Energy Resources
These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.
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Where did fossil fuels originally capture their stored chemical energy from?
Answer: The Sun
Why: Most coal formed in the Carboniferous, 300 to 360 million years ago, so it stores sunlight captured long before the first dinosaurs.
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Which biofuel from fermented corn and sugarcane is blended into standard gasoline?
Answer: Ethanol
Why: Nearly all US gasoline is E10, about 10 percent ethanol, while Brazil lifted its mandatory blend to 32 percent on 1 August 2026.
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Which effect converts temperature differences to voltage?
Answer: Seebeck effect
Why: The Seebeck effect enables deep-space probes to generate continuous electricity from the heat of radioactive decay.
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What element does the Sun make by fusing hydrogen in its core?
Answer: Helium
Why: Every second, the Sun fuses roughly 600 million tons of hydrogen into helium in its core.
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What energy source ultimately drives the wind?
Answer: solar radiation
Why: Wind is solar energy in motion: the sun heats the air unevenly, then Earth's rough surface and its spin bend the flow.
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About how many times more energy-dense is uranium-235 than coal?
Answer: 2 to 3 million times
Why: One kilogram of uranium-235 can release about 24 million kilowatt hours of heat; a kilogram of coal gives roughly eight.
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