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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Stars and the Universe

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4

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Stars and the Universe

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Paper 3Theory (Core)4 marks

The significance of the Sun in our solar system.

Description

The Sun as a Star

The Sun is the nearest star to Earth and plays a crucial role in our solar system. It is the primary source of energy for the Earth.

  1. a

    Explain Why is the Sun important for life on Earth?

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 3 structured question: Stars and the Universe

Paper 3Theory (Core)2 marks

Description

Astronomical Distances

Astronomers often use light-years to measure distances in space. A light-year is defined as the distance light travels in one year in a vacuum, which is about 9.46 trillion kilometers.

  1. a

    Define What is a light-year?

    Aim for approximately 2 distinct marking points.

    [2]