Download Ch 22 AstroGoes

Ch. 22 AstroGoes
Name __________________________
Period _____
Directions: Answer the following questions and statements on a SEPARATE sheet of paper. Use complete
sentences with correct spelling, grammar, and punctuation.
1. What is an astronomical unit?
2. Explain the difference between the mean solar day and the sidereal day.
3. Newton learned that the orbits of planets are the results of what two forces?
4. Explain the difference between the mean solar day and the sidereal day.
5. What is the approximate length of the cycle of the phases of the moon?
6. What phase of the moon occurs approximately one week after the new moon?
7. How many eclipses normally occur each year?
8. How long can a total eclipse of the moon last? A total eclipse of the sun?
9. Describe three features found on the moon's surface.
10. Briefly outline the history of the moon.
11. Explain why the planets appear to have retrograde motion.
12. List and describe four motions that Earth continuously experiences.
13. Compare and contrast an umbra and a penumbra.
14. Select the number that illustrates the moon's position in its orbit for each of the following phases: full, third
quarter, waxing crescent, new, waning.
15. What number represents the position of the moon during a lunar eclipse? A solar eclipse?
16. Does Earth move faster in its orbit near perihelion (January) or near aphelion (July)? Based on your
answer, is the solar day longest in January or July?
17. The moon rotates very slowly on its axis. Predict how this affects the lunar surface temperature.
18. Solar eclipses are slightly more common than lunar eclipses. Why then is it more likely that your region of
the country will experience a lunar eclipse?
19. In what ways do the interactions between Earth and its moon influence the Earth-moon system? If Earth
did not have a moon, would the atmosphere, hydrosphere, solid Earth, and biosphere be any different?
Explain.
20. What feature exists at point A? How did this feature likely form?
21. What is the oldest feature in the photograph? How do you know?
22. How does the fact that Venus appears full when it is smallest support Copernicus's view rather than the
Ptolemaic system?
23. Explain how Galileo's discovery of a rotating sun supported the heliocentric model.
24. What is the result of the moon's period of rotation and revolution being the same?