Solar System

46. The earth's moon revolves around the earth.

23. A comet is

47. The rotation of the earth causes

8. The _________ is a layer of air that surrounds the Earth and protects humans from the sun's radiation.

1. Our solar system is made up of 8 planets (including Earth)

6. The 4 inner planet- Mercury, Venus, Earth, and Mars- all have

24. A meteoroid is a ________, _________ body that travels through space.

21. Venus is known as "Earth's Twin" because

33. Mars is a terrestrial planet.

22. Comets give off dust in the form of a

32. Pluto is one of the Gas giants.

19. Which property makes Earth unique compared to other planets in the solar system?

25. On which planet is Olympus Mons, the largest mountain in the solar system, located?

36. Neptune is bigger than Saturn.

20. Which planet is the hottest planet in the solar system due to the greenhouse effect?

5. Earth's major source of heat and light comes from

38. A long-term orbiting platform where scientists can work in space is called a

11. Humans have traveled to Mars and Venus (true or false)

12. Which telescope has allowed scientists to learn more about planet Earth?

31. A _____ is a large collection of stars, gas, and dust held together by gravity

41. The moon appears in a series of irregular phases that are hard to predict.

35. The closest star to Earth is the Sun

30. A _______ is an instrument that is used to make distant objects appear brighter and larger

16. What separates the inner planets from the outer planets?

43. Ocean tides follow a predictable pattern.

13. There is an International Space Station orbiting Earth, that allows space to be studied continually. (true or false)

45. The earth revolves around the moon.

34. Moons are natural satellites.

2. All of the planets in our solar system orbit around the Sun.

7. The major gravitational force in the Solar System is

17. The chemical makeup of the Sun is

3. Earth is the only planet that has a moon.

28. _________ is a machine that uses escaping gas to move

40. How many planets (that we know of) are in our solar system?

15. Which of the following is NOT a planet in our Solar system?

42. Each night we see a different side of the moon.

29. The first artificial satellite launched into space was

27. The outer planets are also called

14. The biggest planet in our solar system is

39. What was formally the ninth planet from the sun?

10. How many stars are in our solar system?

37. Humans have landed probes on Mars and Venus.

4. We can calculate how long it takes planets to revolve around the Sun.

26. _________ appear on the surface of the sun and look dark because of the lower temperatures near it.

44. Eclipses are predictable.

18. Which is the eighth planet from the Sun?

9. Which of the following are reasons Earth sustains life?