Solar System and Changing Earth Review

What is a large object that orbits the sun, has become rounded by its own gravity, and has cleared the area of its orbit?

• Asteroid

• Meteor

• Planet

• Comet

What is a small, mostly rocky or metallic body that orbits the sun in the inner solar system?

• Kuiper belt

• Asteroid

• Meteor

• Comet

What is a meteoroid that enters Earth's atmosphere in a streak of light?

• Asteroid

• Meteor

• Comet

• Dwarf planet

What is the region beyond Neptune's orbit extending 30 to 50 AU from the sun?

• Oort cloud

• Kuiper belt

• Solar system

• Orbit

What is a loose ball of ice and rock that usually has a long, narrow orbit around the sun?

• Asteroid

• Meteor

• Comet

• Dwarf planet

What is the most distant part of our solar system?

• Kuiper belt

• Oort cloud

• Solar system

• Orbit

What includes the sun, the planets, and a variety of other objects?

• Comet

• Oort cloud

• Solar system

• Astronomical unit

What is an average-sized star, composed of helium and hydrogen, at the center of the solar system?

• Sun

• Planet

• Moon

• Asteroid

What is to travel in a curved path around something?

• Orbit

• Inertia

• Habitable zone

• Composition

What is a unit of distance equal to the average distance from the sun to Earth, or about 150,000,000 km?

• Astronomical unit

• Orbit

• Inertia

• Habitable zone