2. Which inner planet has a thin atmosphere of CO 2 ?

3. Mars

4. Which inner planet has an atmosphere of O 2 and liquid water?

5. Earth

6. Which inner planet would see the Sun rise in the West and set in the East?

7. Venus

8. Which planet could Earth cast a shadow onto?

9. Mars

10. Which inner planet has thick sulfuric acid and CO 2 atm.?

11. Venus

12. Which planet is the only known planet to have water in all 3 states; solid, liquid, and gas?

13. Earth

14. Which planet is the only known planet to support life?

15. Earth