Comprehension about planets

Our solar system has ______ planets.

• 5

• 6

• 7

• 8

What do the planets revolve around?

• Sun

• Moon

• Sea

• Each other

What are the smaller planets made of?

• gas

• rock

• grass

• liquid

Which planet is the closest to the sun?

• Jupiter

• Venus

• Mercury

• Mars

How long is a year on Mercury?

• 88 hours

• 88 days

• 88 years

• 88 minutes

How many space crafts visited Mercury?

• 1

• 2

• 3

• 4

What is the minimum temperature on Mercury?

• -173 degrees Celcius

• -427 degrees Celcius

• Just as cold as earth

• All of the above

Who found the planet Mercury?