10 Questions
What is the main source of energy for wood?
Light energy from the sun
How are fossil fuels like coal and oil formed?
By compression of layers of sediment and rock over millions of years
What is released when fuels are burned?
Chemical energy
Why can gasoline fuel be used in cars?
Because it can produce heat and power when burned
Where did the energy in fossil fuels originally come from?
Sunlight captured by plants millions of years ago
What is the process called when you burn a fuel in the presence of an oxidant?
Combustion
Why are combustion reactions known to be exothermic?
Because they release heat
What are the products of a combustion reaction involving methane and oxygen?
Carbon Dioxide + Water + Energy
Why does combustion release heat energy?
Because the bonds in fuel molecules have less energy than the bonds in water and carbon dioxide
What happens to the excess energy in a combustion reaction?
It is released as heat
Explore the concept of fuel as a material that produces heat, light, or power when burned. Learn about the chemical energy present in fuels and how it is released through combustion. Understand the role of fuels in keeping us warm, cooking food, and powering vehicles.
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