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Energy Challenges and Dilemmas

Classifying energy resources

  • 3 things to know
  • Component 3 Section B

Overview

Recyclable energy resource, difference between a stock resource and a flow resource and commercial energy and contrast it with non-commercial energy.

What you need to know

Answer each one before you reveal it.

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Key term

Distinguish renewable, non-renewable and recyclable energy resources.

Key term

Distinguish renewable from non-renewable energy resources.

Key term

What is a recyclable energy resource?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    Distinguish renewable from non-renewable energy resources.

    Model answer

    A renewable resource is replenished on a human timescale and is not used up by consumption. A non-renewable resource exists as a fixed stock that is depleted as it is used.

  2. 2

    What is a recyclable energy resource?

    Model answer

    A recyclable resource can be reprocessed and used again, as spent nuclear fuel can. Reprocessed uranium and plutonium return to the fuel cycle rather than going to waste.

  3. 3

    Distinguish a primary from a secondary energy source.

    Model answer

    A primary source is used in the form found in nature, such as coal, oil or wind. A secondary source is converted from a primary one, and electricity is the main example.

  4. 4

    Explain the difference between a stock resource and a flow resource.

    Model answer

    A stock resource sits in the ground as a finite quantity, as oil and coal do. A flow resource arrives continuously, as sunlight, wind and river discharge do.

  5. 5

    Define commercial energy and contrast it with non-commercial energy.

    Model answer

    Commercial energy is bought and sold in a market, such as electricity, petrol or piped gas. Traditional fuels gathered without payment, such as firewood and dung, are non-commercial.

  6. 6

    What is meant by an energy mix?

    Model answer

    An energy mix is the combination of sources a country uses to meet its total demand. The mix is usually stated as a percentage share for each fuel.

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