Space Review

Which are the inner planets?

• Mercury, Venus, Mars and Jupiter

• Venus, Neptune, Earth, Mercury

• Mars, Venus, Earth and Mercury

• Earth, Mars, Mercury, Uranus

What are comets mostly made of?

• rock

• gas

• ice

• Hydrogen

How many days does it take for Earth to revolve around the sun?

• 365

• 24

• 1

• 1,000

What is a galaxy made of?

• one solar system and the objects that orbit the stars

• rocks and minerals

• space

• dust, gas, and many stars with all the objects that orbit the stars

Is a blue star hotter than the sun?

• yes

• no

How many times bigger is the sun than the Earth?

• 1,000

• 4

• 1,000,000

• 100

What kind of star is the sun?

• dwarf star

• red giant

• average star

• huge star

What is the Earth made of?

• gas

• magma

• rock

• moons

What is in the core of the Earth?

• magma

• iron

• bedrock

• gas

What rotates on an axis?

• solar system

• planets

• asteroid

• comets