Planets

_______ is the center of the solar system.

• Earth

• Milky Way

• Sun

• Star

All of the inner planets have a rocky surface.

• True

• False

The sun is a ____________star.

• Blue

• Yellow

• Blue dwarf

• Yellow dwarf

The sun is composed of mostly _________ and _________.

• Hydrogen, helium, methane

• Hydrogen, helium

• Oxygen, carbon dioxide

• Nuclear fusion

The sun makes up 98% of the mass of the solar system.

• True

• False

_______ is the closest planet to the sun.

• Mercury

• Venus

• Earth

• Mars

Mercury has _____ moons.

• 3

• 2

• 1

• 0

The surface of Mercury is covered in…

• Water

• Lava

• Gas

• Craters

Venus’ year is longer than its day.

• True

• False

The atmosphere of Venus is composed of..

• Oxygen

• Carbon Monoxide

• Carbon Dioxide

• Helium