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Questions and Answers
What is the main source of energy for wood?
What is the main source of energy for wood?
- Heat energy
- Glucose energy
- Chemical energy from burning
- Light energy from the sun (correct)
How are fossil fuels like coal and oil formed?
How are fossil fuels like coal and oil formed?
- Through chemical reactions in the Earth's core
- By compression of layers of sediment and rock over millions of years (correct)
- By burning dead animals
- By extracting hydrogen from water
What is released when fuels are burned?
What is released when fuels are burned?
- Light energy
- Water vapor
- Glucose
- Chemical energy (correct)
Why can gasoline fuel be used in cars?
Why can gasoline fuel be used in cars?
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Where did the energy in fossil fuels originally come from?
Where did the energy in fossil fuels originally come from?
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What is the process called when you burn a fuel in the presence of an oxidant?
What is the process called when you burn a fuel in the presence of an oxidant?
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Why are combustion reactions known to be exothermic?
Why are combustion reactions known to be exothermic?
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What are the products of a combustion reaction involving methane and oxygen?
What are the products of a combustion reaction involving methane and oxygen?
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Why does combustion release heat energy?
Why does combustion release heat energy?
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What happens to the excess energy in a combustion reaction?
What happens to the excess energy in a combustion reaction?
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