Chapter 4 Science Test

The Sun, planets, and their moons, and other objects that orbit the Sun.

• planet
• solar system

Mercury, Venus, Earth, & Mars

• Inner planets
• Outer planets
• Both
• Pluto

To move in a path around the Sun and other objects

• orbit
• spin

A very large planet made up of mostly gases

• Inner planets
• Gas Giants
• Moon
• Venus

Jupiter, Saturn, Uranus, & Neptune

• Inner planets
• Outer planets
• Both
• Earth

A large body in space that moves around a star.

• moon
• planet
• space probe
• solar system

A small body in space that orbits around a planet.

• moon
• planet
• space probe
• solar system

A craft that helps scientists explore outer space. It carries instruments and not people.

• space shuttle
• rocket
• space probe
• telescope

a telescope that takes in light

• radio telescope
• optical telescope
• Hubble Space Telescope

Inner planets get a lot of ___________because they are close to the sun.

• heat
• light
• both