1. Chapter 15 Study Guide What Patterns do the Earth, Sun, Moon, and the stars Show?

2. Earth spins around an imaginary line called the… a.Equator b.Axis c.North pole d.None of the above

3. Answer b. axis

4. How long does it take for Earth to rotate one time? a.about one month b.about one year c.about 24 hours d.about 12 hours

5. Answer c. about 24 hours

6. What causes shade beneath a tree? a. the seasons b. the phases of the Moon c. the tree blocking sunlight d. Earth reflecting sunlight

7. Answer c. the tree blocking sunlight

8. Shadows cast by the Sun are the shortest… a. at noon. b. at night. c. in the morning. d. in the afternoon.

9. Answer a. at noon.

10. The northern half of Earth tilts away from the Sun during which month below? a. June b. March c. December d. September

11. Answer c. December

12. What causes the seasons to change on Earth? a. the tilt of Earth and its rotation b. the tilt of the Sun and its rotation c. the tilt of Earth and its revolution around the Sun d. the tilt of the Sun and its revolution around Earth

13. Answer c. the tilt of Earth and its revolution around the Sun

14. Complete the sentence. In the summer, the number of hours of daylight is_________ the number of hours of darkness. a. less than b. the same as c. greater than d. about equal to

15. Answer c. greater than

16. How long does it take the Moon to go once around Earth? a. longer than the four seasons put together b. longer than it takes Earth to go around the Sun c.about as long as it takes Earth to rotate once on its axis d.about as long as it takes the Moon to rotate once on its axis

17. Answer d. about as long as it takes the Moon to rotate once on its axis

18. What is this phase of the Moon called? a. a full Moon b. a new Moon c. a crescent Moon d. a first quarter Moon

19. Answer c. a crescent Moon

20. What causes a lunar eclipse? a. Earth casts a shadow on the Sun. b. Earth casts a shadow on the Moon. c. The Moon casts a shadow on Earth. d. The Sun casts a shadow on the Moon.

21. Answer b. Earth casts a shadow on the Moon.

22. Why do some stars appear dimmer than others? a. They are bigger than other stars. b. They are hotter than other stars. c. They are closer to Earth than other stars. d. They are farther away from Earth than other stars.

23. Answer d. They are farther away from Earth than other stars.

24. Short Answer Questions You must answer in complete sentences and use proper capitalization and punctuation.

25. Describe what would Earth be like without the Sun. Give three examples.

26. Answer The Earth would be dark. The Earth would be cold. Nothing would be alive on Earth.

27. If you observe constellations at different times of the year, what will you notice about how they move?

28. Answer The constellations are in different parts of the sky at different times of the year. The constellations seem to rotate around the North Star.

29. Extra Credit Explain why the full Moon is so bright at night even though it does not make light. Then tell how long it takes for the Moon to cycle from one full Moon to the next and what happens between full Moons.