The Solar System

What holds the moon, the planets, and all other objects in orbit around the sun?

• ocean tides
• magnetism
• gravity
• the sun's heat and light

Which planet is the hottest planet?

• Mercury
• Mars
• Venus
• Saturn

Earth and the other planets closest to the Sun are made mostly of _______

• gas
• metal
• water
• rock

Which planet has the smallest pull of gravity?

• Saturn
• Jupiter
• Neptune
• Mercury

The four terrestrial planets all have

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

One full orbit of an object around another object is called a ________.

• axis
• rotation
• revolution
• satellite

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

• solar system
• earth
• rotation
• United States

which of the following is the cause of Mercury having a shorter year than Jupiter

• Mercury orbits closer to the sun
• Mercurys orbit is more circular than Jupiter
• Mercury rotates at a slower speed than Jupiter
• Mercury has a more elliptical orbit than Jupiter

Which outer planets have rings?

• Just Saturn
• Saturn and Jupiter
• Jupiter, Neptune, and Saturn
• all 4 of them

How does changing the distance between objects affect the force of gravity?

• Decreasing distance increases gravity
• increasing distance increases gravity 
• Distance does not affect gravity