# Describe the scale of the universe, from the smallest to the largest structures, including the position of our Solar System within these structures.

> WJEC A-Level Physics (Wales) — 4.3 Orbits and the wider universe · Describe · 5 marks

## Mark scheme (5 marks)

1. The Solar System contains the Sun and the planets (and other bodies) that orbit it
2. The Solar System is part of a galaxy called the Milky Way
3. A galaxy is a large collection of billions of stars held together by gravity
4. The universe contains billions of galaxies
5. The universe is the largest structure / contains everything that exists

## Key terms

- [Solar System](https://www.gradenine.co.uk/glossary/solar-system)
- [universe](https://www.gradenine.co.uk/glossary/universe)

## Related

- [Revision notes for WJEC A-Level Physics (Wales)](https://www.gradenine.co.uk/learn)
- [How to answer "Describe" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

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Source: [GradeNine](https://www.gradenine.co.uk/q/describe-the-scale-of-the-universe-8cc71c09) · Published by Druglandscape Ltd.