What holds the planets in their orbits around the sun?

• gravity
• speed
• string
• air currents

What is in the center of the Heliocentric Model?

• Sun
• Comet 
• Jupiter
• Earth

In which type of model are the Sun, other planets, and the Moon in orbit around the Earth?

• heliocentric model
• tetrahedral model
• concentric model
• geocentric model

An _______ is between the orbits of Mars and Jupiter. 

• Oort Cloud
• Asteroid belt
• Kuiper belt
• Photosphere

Venus, Mercury, Earth, and Mars are what type of planet?

• Gas Giants
• Ice Giants
• Terrestrial Planets
• Exterior Planets

Which choice shows the correct order of the planets?

• Mars, Venus, Earth, Mercury, Jupiter, Saturn, Uranus, Neptune
• Earth, Venus, Mars, Mercury, Jupiter, Saturn, Uranus, Pluto
• Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
• Saturn, Venus, Mars, Mercury, Jupiter, Neptune Mercury, Uranus

What planet is it?

• Jupiter
• Saturn
• Uranus
• Venus

Jupiter, Saturn, Uranus, and Neptune are what type of planets?

• Gas Giants
• Ice Giants
• Terrestrial Planets
• Exterior Planets

What is responsible for smaller objects in space continuously circling/orbiting larger objects? 

• light-year
• air
• wind
• gravity

The four terrestrial planets all have

• Rocky surfaces
• Hot temperatures
• Deep atmospheres
• Large size