Unit 3 Earth and Space Vocabulary

Earth rotates around an imaginary line called an ________________.

• orbit
• pole
• axis
• gravity

A __________moon appears to be getting bigger from one night to the next.

• full
• waxing
• new
• waning

The unit of measure scientists use to measure distances in our solar system is called?

• kilometers
• light years
• days
• astronomical unit

The path an object takes around another object in space.

• gravity
• axis
• revolution
• orbit

A __________________ is a large round body that revolves around a star in a clear orbit.

• planet
• moon
• sun
• asteroid

The force that pulls objects toward each other is called

• friction
• gravity
• repel
• orbit

What is made up of a star, planets and other bodies that revolve around it?

• Universe
• Solar System
• Galaxy
• Space

To turn like a top means to

• revolve
• spin
• rotate
• twirl

A _____________ is an object that moves around another larger object in space.

• reflection
• comet
• crater
• satellite

A _________ is a huge ball of hot, glowing gas that produces its own heat and light.

• galaxy
• planet
• star
• moon