Our Universe Chapter 35

A celestial body is ...

• An object that orbits a star

• A naturally made object outside the Earth's atmosphere

• A small rocky body orbiting a star

• A natural satellite of a planet

Stars can be different colours. True or false.

• True

• False

Choose the planet(s) in the list below (there may be more than one answer!)

• Mercury

• Io

• Triton

• Neptune

What is the colour of our Sun?

• Red

• Orange

• Yellow

• Green

A galaxy is ...

• A celestial body that generates its own heat

• Large round space object that circles a star in its own orbit

• Natural satellite of a planet

• Collection of many millions of stars

Our galaxy is called the

• Solar system

• Sun

• Milky Way

• Pluto

Select the planet(s) in the list below that are mostly made of rock (there may be more than one answer!)

• Mercury

• Earth

• Jupiter

• Uranus

Select the planet(s) below that are mostly made of gas. (there may be more than one answer!)

• Venus

• Saturn

• Uranus

• Mars

Select the characteristic(s) that planets and dwarf planets share (there may be more than one answer!)

• They have not cleared their own orbit

• Round shape

• Orbit the Sun

Pluto is a ...

• Planet

• Dwarf planet