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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Energy, work and power

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Energy, work and power

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Paper 3Theory (Core)4 marks

Energy efficiency in household appliances.

Description

Energy Efficiency

Household appliances convert electrical energy into useful work, but some energy is lost as heat.

  1. a

    Explain Discuss how the principle of conservation of energy applies to household appliances.

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 3 structured question: Energy, work and power

Paper 3Theory (Core)3 marks

Description

Energy Flow in a Roller Coaster

As the roller coaster climbs to the top of the first hill, it gains potential energy. As it descends, this potential energy is converted to kinetic energy.

  1. a

    Analyse Describe the energy transformations that occur as the roller coaster moves from the top of the hill to the bottom.

    Aim for approximately 3 distinct marking points.

    [3]