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Astronomy 2 Review

This article explains the length of time it takes for the Moon to rotate and revolve around the Earth, why we weigh less on the Moon, when the Moon is closest to the Earth, how the Moon lights up the night sky, the difference between craters and maria on the Moon, identifying moon phases, and the causes of the different seasons on Earth.

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Astronomy 2 Review

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  1. Astronomy 2Review

  2. 1. Compare the length of time it takes the Moon to rotate with the amount of time it takes the Moon to revolve once around the Earth. • Rotation = 27.3 days, Revolution = 27.3 days • They are the SAME! 2. Why would you weigh less on the moon? • There is less gravity on the Moon. 3. Identify when the Moon is closest to the Earth. • During Perigee

  3. 4. If the Moon does not produce it’s own light, then why does it light up the night sky? • It reflects light from the Sun. 5. Compare and contrast craters with the maria found on the Moon. • Craters are created by meteorites and are empty. Maria were also created by meteorites but the space filled up with lava and cooled, creating the dark color of the maria.

  4. 6. What Moon Phase Is This? And… How Do You Know?

  5. Waxing Crescent Light on the right. Less than half lit.

  6. 7. What Moon Phase Is This? And… How Do You Know?

  7. First Quarter Light on The right. Exactly half lit.

  8. 8. Name this phase! Full Moon

  9. 9. What phase of the moon will appear shortly after the phase pictured below? • Full moon • New moon • Waning gibbous moon • First quarter moon D

  10. 10. Which statement BEST explains why the Moon has different phases during a lunar month? • The Moon and the Sun appear to be the same size when seen from the Earth. • The Moon rotates on its axis exactly one time during each revolution around the Earth. • The Moon reflects different amounts of sunlight in its orbit around the Earth. • The Moon casts a shadow on Earth when it moves directly between the Earth and Sun. C

  11. 11. 4 3

  12. 12. X C revolution

  13. 13. C What phase of the moon would we see from Earth when the moon is at the following position? A. new moon B. waxing gibbous C. full moon D. waning crescent

  14. 14. What phase of the moon would we see from Earth when the moon is at the following position? A. new moon B. waxing crescent C. full moon D. waning crescent A

  15. 15. 2

  16. 16. 3

  17. 17. 1

  18. 18. 3

  19. 19. 3

  20. 20. 3

  21. 21. 29.5 days/ 1 month/lunar month gravity

  22. 22. 29.5 days/ 1 month/lunar month gravity tides

  23. 23. 3

  24. 24. 3

  25. 25. 1

  26. 26. 4

  27. 27. 3

  28. 28. 2

  29. 29. At which position would the moon be during a neap tide? 2

  30. 30. How are the sun, Earth, and moon situated in space so that we experience a spring tide? Sun, Earth, and the moon lined up with each other.

  31. 31. Explain what causes the Earth to experience the different seasons? Earth’s tilt Earth’s revolution around the Sun 32. Why does Earth experience Winter? The Earth’s pole tilts away from the sun, and part of it receives indirect light (colder) and less daylight hours. 33. Why does Earth experience summer? The Earth’s pole tilts toward the sun, and part of it receives direct light (warmer) and more daylight hours.

  32. 34. What happens on Earth during the vernal equinox and autumnal equinox? Every place on Earth receives 12 hours daylight and 12 hours dark. 35. What happens to the number of daylight hours during the summer as you move from the equator to the North Pole? The number of daylight hours increases.

  33. 36. Label all seasons that occur in the Northern Hemisphere at each lovation in this diagram. 37. Identify the date each of these seasons begin. SPRING EQUINOX MARCH 21 SUMMER SOLSTICE WINTER SOLSTICE JUNE 21 DEC 21 FALL EQUINOX SEPT 21

  34. 38. 1

  35. 39. • Earth’s tilt • Earth’s revolution around the sun. a. State one reason that Earth has seasons. b. If Earth is at position D, how much time would it take to return to position D? • 365.25 days c. Which season begins in the Northern Hemisphere when Earth is at position A? • Summer solstice d. At what letter is the Earth at perihelion? • C

  36. 40. 2

  37. 41. It decreases. Winter Solstice It’s pointed toward the sun.

  38. 42. 2

  39. 43. Rotation

  40. 44. 2

  41. 45. 1

  42. 46. When its Sunday in Sydney, Australia, what day is it in Anchorage, Alaka? Saturday – If you cross the International Date Line going East you lose a day.

  43. 47. When its 6pm in New York City, what time is it Mexico City? 6pm

  44. 48. 2

  45. 49. What kind of eclipse is this? Solar Eclipse

  46. 50. 3

  47. 51. Explain how a lunar eclipse differs from a solar eclipse? During a lunar eclipse, the moon passes though Earth’s shadow because Earth is in between the Sun and the Moon. During a solar eclipse, the Sun is blocked by the moon. 52. Where must an observer be located in order to see a total solar eclipse as well as a total lunar eclipse? In the umbra (dark part of the shadow).

  48. 53. 1

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  50. 55.

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