Our Solar System

What is in the solar system?

• the sun and everything that orbits around it

• planets and their moons

• asteroids and comets

• All of the answers are correct

What keeps the planets in orbit?

• the sun's gravity

• the moon's gravity

• the planets' gravity

How many planets are in the solar system?

• five

• six

• seven

• eight

Which planet is almost the same size as Earth?

• Mercury

• Venus

• Mars

• Jupiter

_____________________ are called dirty snowballs.

• asteroids

• comets

• meteors

• satellites

How do we know about the other planets?

• We have traveled to the other planets.

• telescopes, space probes, and the International Space Station

• We are only guessing.

Another word for "moon" is_______________.

• comet

• meteor

• planet

• satellite

Planets move in how many ways?

• They move in three different ways.

• They move in one way.

• They move in two ways.

• They don't move at all.

Mercury and Venus do not have any moons.

• True

• False

____________________ are large chucks of rock and metal.

• Comets

• Meteors

• Asteroids

• dirty snowballs