If you could use any source of energy for heating your food,which one would you use and why?

  • A
    Coal,because it is cheap.
  • B
    Wood,because it is easily available.
  • C
    Natural gas,because it is a clean and efficient fuel.
  • D
    Electricity,because it is the most expensive.

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On what basis would you classify energy sources as
$(a)$ renewable and non-renewable?
$(b)$ exhaustible and inexhaustible?
Are the options given in $(a)$ and $(b)$ the same?

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Give the names of two energy sources that you would consider to be exhaustible. Give reasons for your choices.

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