Unit 10 – Energy: Uses and Sources

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Questions and Answers

Which type of energy is stored in stretched or squashed objects?

  • Elastic energy (correct)
  • Gravitational potential energy
  • Thermal energy
  • Chemical energy

In which objects is gravitational potential energy stored?

  • Watches and metal
  • Food and batteries
  • Raised objects and water behind a dam (correct)
  • Petrol and diesel

Which substance reacts to produce electricity in batteries?

  • Petrol
  • Chemical substances (correct)
  • Diesel
  • Water

Which object would be able to store the most thermal energy between wood and metal?

<p>Metal (C)</p> Signup and view all the answers

What is the reason for a battery being considered 'dead' or 'flat'?

<p>Discharge of chemical substances (D)</p> Signup and view all the answers

Where do machines usually receive their energy from?

<p>Fuels or electricity (C)</p> Signup and view all the answers

Which type of energy is usually produced in large power stations?

<p>Electrical energy (A)</p> Signup and view all the answers

Where is electricity carried to from large power stations?

<p>Users along metal cables (D)</p> Signup and view all the answers

Which of the following represents chemical energy?

<p>Energy of a chemical substance (D)</p> Signup and view all the answers

What is a fuel according to the text?

<p>A chemical that stores energy (D)</p> Signup and view all the answers

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