1. The Solar System Review

2. Question 1: Name the inner planets from closest to farthest from the sun.

3. Answer: Mercury Venus Earth Mars

4. Question 2: Describe the relative size of the inner planets.

5. Answer: The inner planets are smaller than the outer planets except for Pluto.

6. Question 3: Describe the relative distance of the inner planets from each other.

7. Answer: The inner planets are closer together (and to the sun) than the outer planets.

8. Question 4: Describe the surface (composition) of the inner planets.

9. Answer: The inner planets are all composed of rock.

10. Question 5: Describe the location of the asteroid belt.

11. Answer: The asteroid belt is located between Mars and Jupiter (the inner and outer planets).

12. Question 6: Name the outer planets from closest to farthest from the sun.

13. Answer: Jupiter Saturn Uranus Neptune Pluto

14. Question 7: Describe the relative size of the outer planets.

15. Answer: The outer planets are much larger than the inner planets except for Pluto.

16. Question 8: Describe the relative distance of the outer planets from each other.

17. Answer: The outer planets are much farther apart (and farther from the sun) than the inner planets.

18. Question 9: Describe the surface (composition) of the outer planets.

19. Answer: The outer planets are composed of gases. Pluto’s surface is made of rock like the inner planets.

20. Question 1o: List 2 ways Pluto is different from the other outer planets.

21. Answer: Pluto is small compared to the other outer planets. Pluto is composed of rock compared to the “gas giants.” Pluto does not have any rings.

22. Question 11: List 3 reasons humans cannot live on other planets.

23. Answer: Extreme temperatures Gas surfaces (composition) Minimal or no oxygen Too much or too little pressure No drinkable, liquid water Extreme weather

24. Question 12: These two forces keep the planets from flying out of the solar system.

25. Answer: Gravity and Inertia

26. Question 13: What is the tendency of a moving object to continue moving in a straight line?

27. Answer: Inertia

28. Question 14: What is the force that attracts objects toward each other?

29. Answer: Gravity

30. Why don’t the planets fly out of the solar system? Explain in detail!

31. Question 15: Which planet is the closest in size to Earth?

32. Answer: Venus

33. Question 16: Which two planets make up over 95% of the mass of all the planets?

34. Answer: Jupiter and Saturn

35. Question 17: What is the innermost layer of the Sun?

36. Answer: Core

37. Question 18: Which layer of the Sun is visible to us on Earth? (the one that we see)

38. Answer: Photosphere

39. Question 19: Which outer layer of the Sun is only visible to us during a solar eclipse?

40. Answer: Corona

41. Question 20: What are the dark, cooler spots on the photosphere called?

42. Answer: Sun Spots

43. Question 21: What is the name of the middle layer of the sun which gives off a reddish glow during a solar eclipse?

44. Answer: Chromosphere

45. Question 22: What are the explosions that occur on the Sun which release large amounts of energy called?

46. Answer: Solar Flares