Y7: Solar System

• Physics
• Lower Secondary (Key Stage 3)

Y7: Solar System

Smallest

Largest

Put these objects in order of size.

Sun

Earth

Moon

Solar system

Galaxy 

Universe

Human

Atom

Name the four inner planets.

Which inner planet is closest to the sun?

1. Mercury
2. Venus
3. Earth
4. Mars

Which inner planet has robotic explorers on its surface?

1. Mercury
2. Venus
3. Earth
4. Mars

Which inner planet is the coldest?

1. Mercury
2. Venus
3. Earth
4. Mars

What do inner planets have in common?

Name the four outer planets.

Which outer planet is the biggest?

1. Jupiter
2. Saturn
3. Uranus
4. Neptune

Which outer planet has rings?

1. Jupiter
2. Saturn
3. Uranus
4. Neptune

Venus is a gas giant.

1. True
2. False

Mercury is a rocky planet.

1. True
2. False

Uranus is in between Saturn and Neptune.

1. True
2. False

Mars is in between Venus and Earth.

1. True
2. False

Venus is very cold due to its thick atmosphere.

1. True
2. False

Earth is an inner planet.

1. True
2. False

Saturn has an asteroid belt.

1. True
2. False

Inner planets

Outer planets

Rocky

Gas giants

Hotter

Colder

Short years

Long years

Few moons

Many moons

Jupiter

Mars

Venus

Neptune

Uranus

Mercury

Earth

Saturn

The sun

Inner planets

Outer planets

Jupiter

Earth

Mars

Neptune

Mercury

Saturn

Venus

Uranus

Asteroid belt

Suggest a reason Pluto is no longer considered a planet.