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Energy Resource Management

Developing renewables, and fracking

  • 3 things to know
  • Paper 2 section C

Overview

How hydro-electric schemes, wind turbines and photovoltaic panels generate electricity and what each costs the environment, then what fracking is, the shale it targets, and the objections raised against it.

What you need to know

Answer each one before you reveal it.

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Key term

How do hydro-electric, wind and solar schemes generate electricity, and what does a large dam cost the environment?

Key term

How does a hydro-electric scheme generate electricity?

Key term

Give two environmental costs of building a large dam.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    How does a hydro-electric scheme generate electricity?

    Model answer

    A dam holds back a reservoir, and water released through turbines spins them to drive generators.

  2. 2

    Give one benefit a hydro-electric reservoir brings besides electricity.

    Model answer

    It can store water for irrigation and drinking and help control flooding downstream.

  3. 3

    Give two environmental costs of building a large dam.

    Model answer

    Valley habitats are drowned by the reservoir, and sediment is trapped that would have fertilised farmland downstream.

  4. 4

    How does a wind turbine make electricity?

    Model answer

    Moving air turns the blades, which drive a generator housed at the top of the tower.

  5. 5

    Why are so many new wind farms built out at sea?

    Model answer

    Winds offshore are stronger and steadier, and the turbines stand far from homes.

  6. 6

    How do photovoltaic panels produce electricity?

    Model answer

    Cells within the panel turn sunlight directly into an electric current.

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