The four terrestrial planets are known for their _________

• hot temps
• deep atmospheres
• rocky surfaces
• large size

A force of attraction between any two objects is called _____________.

• static electricity 
• rotation
• gravity
• orbit

The __________ has planets, moons, comets, and asteroids.

• solar system
• earth
• rotation
• United States

Select the order from smallest to largest.

• Sun, Milky Way, solar system, universe
• Sun, Milky Way, universe, solar system
• Sun, solar system, Milky Way, universe
• Sun, solar system, universe, Milky Way

One of the main differences between the outer and inner planets is __________.

• The inner planets all have water
• the inner planets are much bigger than the outer planets
• the outer planets are gas planets
• the inner planets have rings, and the outer planets don't

Which factor makes Earth different from all the other planets in the solar system in its ability to support life? 

• The Earth is exposed to rays from the sun. 
• The Earth has only one moon that orbits around it. 
• The Earth rotates in an elliptical orbit around the sun. 
• The Earth has a breathable atmosphere. 

Which planet is an INNER planet?

• Jupiter
• Mars
• Uranus 
• Neptune

Which planet is an Outer planet?

• Earth
• Mercury
• Saturn
• Venus

All of Earth experiences night at the same time.

• True
• False

Which planet has the shortest orbit around the sun?

• Earth
• Mercury
• Saturn
• Neptune