Mercury Facts for Kids!

Even though it's closest to the sun, Mercury isn't the hottest planet. Why?

• It has a very thin atmosphere, so the heat isn't held in.

• It's rocky, and rocky planets aren't hot.

True or false: Planets have faces and can sing silly songs.

• False

• True

Mercury is the _______ planet.

• smallest

• biggest

Mercury is ______ than Earth.

• smaller

• bigger

Mercury has lots of visible _______.

• craters

• volcanoes

• lakes

Scientists think Mercury and Venus probably don't have moons, because _______________________.

• they are close to the Sun, and the Sun's gravity would pull in any moons.

• they are too small to have moons.

A year on Mercury is ______ than a year on Earth.

• shorter

• longer

Why do they keep making jokes about being small? What fact are they probably trying to help you remember?

• Mercury is the smallest planet.

• All planets are pretty small.