UNIT 10 SOURCES OF ENERGY REVISION

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What are fossil fuels?

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Fossil fuels are non-renewable energy sources formed from the remains of ancient plants and animals, such as coal, oil, and natural gas.

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What does non-renewable mean?

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Non-renewable refers to resources that cannot be replenished in a short period of time, meaning they will eventually run out.

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What is renewable energy?

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Renewable energy comes from sources that are naturally replenished, such as solar, wind, and hydroelectric power.

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What is the environmental impact of fossil fuels?

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Fossil fuels are harmful to the environment as they release greenhouse gases, contributing to climate change and air pollution.

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What is solar energy?

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Solar energy is energy harnessed from the sun's rays, which can be converted into electricity or heat.

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What is wind energy?

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Wind energy is generated by converting the kinetic energy of wind into mechanical power or electricity using wind turbines.

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What is biomass energy?

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Biomass energy is produced from organic materials, such as plant and animal waste, which can be burned or converted into biofuels.

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What is hydroelectric power?

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Hydroelectric power is generated by using the flow of water to turn turbines, producing electricity.

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What is geothermal energy?

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Geothermal energy is heat energy derived from the Earth's internal heat, often used for heating and electricity generation.

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What is pollution?

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Pollution is the introduction of harmful substances or products into the environment, which can cause adverse effects on living organisms.