How many people live on Earth?

• 7 million

• 7 billion

• 7 thousand

• 7 hundred

Why does Earth look blue?

• It has a lot of land

• It has a lot of trees

• It has a lot of rust

• It has a lot of water

Why Mars looks red?

• It has a lot of rusted iron

• It has a lot of water

• It has a lot of trees

• It has a lot of land

What have people sent to Mars to learn about it?

• astronaut

• students

• robots

• ships

How many moons does Mars have?

• 2

• 3

• 1

• 4

Aliens are ...

• living things on Earth

• living things from outer space

• a strong, hard gray metal

• a machine that is runs by a computer

Iron is ...

• a large, round object in space that goes around a star

• living things from outer space

• a machine that is run by a computer

• a strong, hard gray metal

A mountain is ...

• a machine that is run by a computer

• a large, round object in space that goes around a star

• living things from outer space

• a very steep high hill

A planet is ........

• is a gary metal

• a very large, steep him

• a large, round object in space that goes around a star

• a machine that is run by a computer

A robot is ...

• living things from outer space

• a student

• a machine that is run by a computer

• strong, hard gray metal