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Science Olympiad (NSO) Astronomy — practice by topic

Browse 90 questions across 5 Astronomy topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Astronomy topics

Astronomy (90)Olympiad Astronomy (90)Earth Moon and Sky (30)Observing the Sky (30)Solar System (30)

Try a Astronomy question

A student lists Mercury, Venus, Earth and Mars together. This group is the:Read the answer and worked solution →A probe lands on a small rocky world close to the Sun. Such worlds are made mainly of:Read the answer and worked solution →Jupiter, Saturn, Uranus and Neptune are huge and are built mostly from:Read the answer and worked solution →One planet outweighs every other planet put together. That planet is:Read the answer and worked solution →

Worked practice questions

A student lists Mercury, Venus, Earth and Mars together. This group is the:

  1. Terrestrial planets
  2. Outer giant planets
  3. Distant dwarf worlds
  4. Frozen comet swarm
Show answer and solution

Correct answer: A. Terrestrial planets

1. The four planets nearest the Sun form one family. 2. They are called the inner or terrestrial planets. 3. So the group is the terrestrial planets. _Source: OpenStax Astronomy 2e, Chapter 7, Other Worlds: An Introduction to the Solar System._

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A probe lands on a small rocky world close to the Sun. Such worlds are made mainly of:

  1. Salt and water
  2. Rock and metal
  3. Ice and gases
  4. Dust and smoke
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Correct answer: B. Rock and metal

1. Terrestrial planets are relatively small worlds. 2. Their bulk is rock together with metal. 3. So they are made mainly of rock and metal. _Source: OpenStax Astronomy 2e, Chapter 7, Other Worlds: An Introduction to the Solar System._

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Jupiter, Saturn, Uranus and Neptune are huge and are built mostly from:

  1. Ices and gases
  2. Iron and nickel
  3. Rock and metal
  4. Sand and clay
Show answer and solution

Correct answer: A. Ices and gases

1. The four outer planets dwarf the inner ones. 2. Their material is lighter ices, liquids and gases. 3. So they are built mostly from ices and gases. _Source: OpenStax Astronomy 2e, Chapter 7, Other Worlds: An Introduction to the Solar System._

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How to practise

  1. Choose a Astronomy question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
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