7.13 Solar System Chapter Review

1. Which shape describes a planet's orbit?

• a circle
• an ellipse
• a straight line

2. Why is Venus hotter than Mercury?

• Venus's surface is covered with lava.
• Venus has a strong greenhouse effect.
• Venus is closer to the Sun than Mercury is.

3. How are the outer planets similar?

• They have solid surfaces.
• They are about the same size.
• They have atmospheres that are mostly hydrogen.

4. Pluto was known as a planet but is now classified as a(n)

• asteroid.
• meteoroid.
• dwarf planet.

5. An astronomical unit is the average distance

• from Earth to Mars.
• from Earth to the Sun.
• from Earth to the Moon.

Tags

NGSS.MS-ESS1-3

6. ___ orbit close to the Sun and have rocky surfaces.

• asteroids
• comets
• inner planets
• outer planets
• meteors

7. ___ have gaseous surfaces and more than one moon.

• asteroids
• comets
• inner planets
• outer planets
• meteors

8. chunks of rocks and ice that form a belt just beyond Mars

• asteroids
• comets
• inner planets
• outer planets
• meteors

9. light streaks in the atmosphere due to objects from space burning up

• asteroids
• comets
• inner planets
• outer planets
• meteors

10. objects made of ice, rock, and dust that glow near the Sun

• asteroids
• comets
• inner planets
• outer planets
• meteors