Solar System Quiz 21 (25 MCQs)

Quiz Instructions:

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1. Which planet's atmosphere is characterized by a thick yellowish cloud of carbon dioxide that creates a tremendous greenhouse effect?

2. Astronomical Unit

3. How long ago was our solar system formed?

4. Which gas was not present in Earth first atmosphere?

5. Gravity makes Earth revolve around the Sun. Revolve means

6. What keeps a planet moving on its path around the sun

7. Planets form by a process called _____

8. Which Planet comes after Earth in the solar system?

9. Which planet is covered in water?

10. Who proposed Planetesimal theory?

11. Earth has more _____ than land.

12. Which is the SECOND largest planet?

13. What planet rotates on a tilted axis and looks like it is laying on its side?

14. Which term describes a small body from which a planet forms?

15. In a complete sentence name three physical features of the Earth?

16. Why are the outer planets cold and dark?

17. What is a planet?

18. Which of the following planets orbits closest to the Sun?

19. What is the order of the gas giant planets from closest to farthest away from the sun?

20. Why do the sun and moon appear to move across the sky?

21. Which is an object in the solar system that is a frozen mass of ice and dust?

22. Large pieces of space rock with irregular shapes, most are found between the orbits of Mars and Jupiter

23. Which planet is not an inner planet?

24. The group of outer planets are known as

25. Where is the asteroid belt found?