Vocabulary

2. The period of getting smaller
4. one of the four periods of the year (spring, summer, autumn, and winter)
5. when water advances to its furthest extent onto the shoreline.
6. a cycle of 235 synodic months, very nearly equal to 19 years, after which the new moon occurs on the same day of the year as at the beginning of the cycle with perhaps a shift of one day
8. having the observable illuminated part greater than a semicircle
9. the state of being tilted; a sloping position.
10. the periodic rise and fall of the waters of the ocean and its inlets
11. either of the two tides that occur at or just after new moon and full moon when the tide-generating force of the sun acts in the same direction as that of the moon, reinforcing it and causing the greatest rise and fall in tidal level.
13. the orbiting of one heavenly body around another.
14. continually changing views of the sunlit part of the Moon
16. the lowest part of the wave, or its trough.

1. gravity pulls all objects "downward" toward the center of the planet.
2. the period of getting bigger
3. the lunar phase in which the moon imitates the shape of the letter C, or a croissant
5. half of the terrestrial globe or celestial sphere, especially one of the halves into which the earth is divided
7. the movement or path of the earth or a heavenly body turning on its axis.
12. a period of moderate tides when the sun and moon are at right angles to each other.
15. the line about which a rotating body, such as the earth, turns.