Chapter 28 Solar System

What is a planet?

• a swirling ball of gases
• a star
• a huge ball made out of rock
• a large object that orbits a star

Which planet is between Venus and Mars?

• Earth
• Neptune
• Mercury
• Jupiter

A small body that orbits a planet is a(n)

• comet
• moon
• asteroid
• exoplanet

The sun, planets, comets, and asteroids that revolve around the sun all make up the ______________.

• galaxy
• constellations
• Kuiper Belt
• solar system

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

• gas
• metal
• water
• rock

The moon is a natural  ______ of Earth.

• comet
• axis
• satellite
• space probe

Earth's ________ on its axis causes day and night.

• rotation
• revolution
• phase
• comet

Weight is a measure of ______

• mass
• strength 
• gravity
• nothing

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