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The Solar System

In this worksheet, students will answer questions on various aspects of our Solar System.

'The Solar System' worksheet

Key stage:  KS 3

Curriculum topic:   Physics: Space Physics

Curriculum subtopic:   Our Sun as a Star, Other Stars and Galaxies

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

This is a diagram of our Solar System. It is a group of planets that orbit the Sun.

 

 

solar system

 

There are eight planets in the Solar System. It is important to remember them in the correct order of their distance from the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. Pluto used to be considered a planet, but scientists have changed their mind in recent years and now consider it to be a dwarf planet, along with Ceres and Eris. The diagram above does not show the planets in scale according to size or real distance between them. The further a planet is from the Sun the longer it takes to orbit it. 

 

Asteroids

 

Between Mars and Jupiter there is an asteroid belt. The diagram above shows what it feels like to be in a moving asteroid belt! It is made of thousands of small lumps of rock. Some asteroids cross the orbit of the Earth and, if a huge asteroid collides with the Earth, it can cause a catastrophe. It is believed that the dinosaurs became extinct when a huge asteroid hit the Earth 65 million years ago!

 

Dinosaur asteroid

 

Comets are also part of the solar system. They are balls of dirty ice. Some planets have their own natural satellites called moons.

 

Planets do not give out light but we can see them because they reflect light from the Sun. They look bright because they are much closer to the Earth than other stars. The only planet known to have living organisms on it is Earth. The other planets are too hot or too cold.

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