1. Grade 9 Applied Science – Astronomy 1 The Night SkyThe MoonThe PlanetsThe StarsThe Sun 11111 22222 33333 44444 55555

2. A massive collection of gases in space that produce and emit light energy

3. What is a STAR?

4. A large, round celestial object that travels around a star

5. What is a PLANET?

6. Everything that exists including all the millions of galaxies together, plus all the matter, energy and space

7. What is the UNIVERSE?

8. Earth is part of this galaxy

9. What is the MILKY WAY?

10. We see the Moon because it does this

11. What is THE MOON REFLECTS LIGHT FROM THE SUN?

12. 4.6 billion years ago

13. What is the date when Earth’s Moon was formed?

14. Circular or bowl-shaped holes in surfaces caused by the impact of a celestial object

15. What is a CRATER?

16. 100 O C in direct sunlight to -100 O C in the shade

17. What is RANGE OF SURFACE TEMPERATURES ON THE MOON?

18. Today, the Moon is mostly solid. When it was formed, it was this

19. What is MOLTEN ROCK?

20. A thin crust, a very thick mantle, and a small and partially liquid core

21. What are THE THREE INTERIOR LAYERS OF THE MOON?

22. Eight

23. What is THE NUMBER OF PLANETS IN OUR SOLAR SYSTEM?

24. The closest planet to the Sun.

25. What is MERCURY?

26. The rings around Saturn are composed of this material

27. What are ICE CRYSTALS?

28. The Outer Planets (Jupiter, Saturn, Uranus and Neptune) are also known by this name

29. What is GAS GIANTS?

30. This former planet is now classified as a dwarf planet.

31. What is PLUTO?

32. 300,000 km/s

33. What is THE CONSTANT SPEED AT WHICH LIGHT TRAVELS?

34. The time it takes light from the Sun to reach the Earth

35. What is EIGHT MINUTES?

36. The distance light travels in one year

37. What is a LIGHT YEAR?

38. Stars can be red, yellow, white or blue in colour. The colour of a star depends on this

39. What is SURFACE TEMPERATURE?

40. The amount of energy released by a star every second

41. What is LUMINOSITY?

42. A dark area on the Sun’s surface that is cooler than the area surrounding it

43. What is SUNSPOT?

44. Electrically-charged particles that flow from the Sun’s corona out into space

45. What is SOLAR WIND?

46. Another name for the Northern Lights

47. What is the AURORA BOREALIS?

48. These produce the Sun’s energy

49. What are NUCLEAR REACTIONS?

50. The colour the Northern Lights appear when the Sun’s solar wind travel along Earth’s magnetic field and strike particles of oxygen

51. What is GREEN?