1. Why is our system called a “solar” system? 

2. How many miles wide is the solar system? 

3. How and when do scientists think our solar system was formed?

4. What is the rotation and revolution of a planet?

5. What are the inner planets?

6. What are the outer planets?

7. How are the inner planets/outer planets alike/different?

8. Why isn’t the closet planet to the sun the hottest?

9. Other than Earth, which other bodies in our solar system might have the potential for life?

10. Why does one side of Uranus get 42 years of light, while the other gets 42 years of darkness?

11. What is the difference between the geocentric and heliocentric diagrams of the solar system?  Which is correct?

12. What do inertia and gravity have to do with planetary orbits around the sun?  Explain the rock/ball activity.

13. Why do scientists use rovers?  What do they do?

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