6-7th Grade Planets Test

Distances within our Solar System are based upon the average distance between Earth and the Sun is called an:

• Unit

• Astronomical Unit

• Kilometer

• Celsius

Small, dense rocky planets made of rock and iron are called

• Planet

• Solar Flare

• Terrestrial Planets

• Moon

Mercury is this many kilometers from the sun:

• 1,000,000,000

• 5

• 58,000,000

• 8,000,000

These are the terrestrial planets:

Venus is this many kilometers from the Sun:

• 108,000,000

• 8,000,000

• 108,000,000,000

• 1,000,000

Surface is hidden by thick clouds of mostly carbon dioxide.

• Mercury

• Venus

density, size, and structure are similar to Earth's

• Venus

• Mercury

• Mars

• Earth

Surface is heavily cratered from collisions with small, rocky objects.

• Venus

• Mercury

• Mars

• Earth

Long cliffs also cover parts of its surface.

• Mercury

• Mars

• Venus

• Earth

takes 225 days to revolve around the sun.

• Mercury

• Mars

• Venus

• Earth