Topic 5: Human Uses of Energy

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What is geothermal energy?

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Geothermal energy is heat that comes from the Earth's interior. It can be used for heating buildings and generating electricity.

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What is a renewable resource?

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A renewable resource is a natural resource that can be replenished naturally over time, such as wind, solar, and water.

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What is a nonrenewable resource?

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A nonrenewable resource is a natural resource that cannot be replaced once it is used up, such as coal, oil, and natural gas.

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What is a wind turbine?

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A wind turbine is a device that converts wind energy into mechanical energy, which can then be used to generate electricity.

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How do scrubbers in coal power plants work?

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Scrubbers are devices that remove harmful substances from the gases produced by burning coal, helping to reduce air pollution.

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What is the main product of burning coal?

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The main product of burning coal is carbon dioxide, along with other pollutants.

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What is the purpose of using renewable energy sources?

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The purpose of using renewable energy sources is to reduce dependence on fossil fuels, lower greenhouse gas emissions, and promote sustainability.

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Give an example of a renewable energy source.

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An example of a renewable energy source is solar energy, which is harnessed from sunlight.

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What is the environmental impact of using petroleum?

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Using petroleum can lead to air and water pollution, greenhouse gas emissions, and habitat destruction.

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What is the significance of using warm water in geothermal heating?

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Warm water in geothermal heating systems transfers heat from the Earth to warm buildings efficiently.