The Solar System

How many planets are in our solar system?

• Eight

• Nine

• Ten

• Twelve

What is the main source of light and heat in our solar system?

• The Moon

• The Sun

• The Earth

• Jupiter

What is the force that keeps the planets in orbit around the sun?

• Electricity

• Air pressure

• Magnetism

• Gravity

What is the name of our galaxy?

• Andromeda

• The Milky Way

• Orion

• The Solar Belt

Which planet is closest to the Sun?

• Mars

• Earth

• Venus

• Mercury

Which two planets are known as the gas giants, due to their size and thick atmosphere?

• Jupiter

• Uranus

• Neptune

• Saturn

Why is the Earth suitable for life?

• It is the closest planet to the Sun.

• It has a solid surface.

• It has an atmosphere and liquid water.

• It is the largest planet.

Why does the moon appear to change shape?

• It is moving closer to the Earth.

• It is melting.

• It is covered in clouds.

• Different parts are lit by the Sun, as the Moon orbits the Earth.

What is the 'Red Planet' also known as?

• Mars

• Mercury

• Uranus

• Venus

What is Pluto?

• A planet.

• An asteroid

• A dwarf planet.

• It doesn't exist.