The Earth-Moon-Sun System

1. The larger, lighter part of a shadow
7. What color does the moon appear during a total lunar eclipse?
8. Dark, flat regions on the moon's surface formed by ancient lava.
10. The darker portion of the moon's shadow during an eclipse.
11. Can only occur during a new moon
12. For the Earth it takes 365.25 days, for the moon it takes approximately 28 days.
14. The phases that follow the full moon due to the loss of visible light each night.
16. What is caused on Earth by differences in how much gravity from the moon and sun pull on it?
18. What is the name of NASA's current lunar exploration program?
19. The brighter, mountainous areas on the moon.
20. The band in the sky through which the planets appear to move throughout the year.
21. How many human beings have walked on the moon?
22. In a lifetime, how many times do "earthlings" see the far side of the moon?
24. This only happens when the moon is full and can be partial or full.
25. The type of moon phase with less than half of the visible surface lit.

2. The shape of Earth's orbit.
3. The phase of the moon when the moon is between the Earth and the Sun.
4. a bowl-shaped pit caused by the impact of a meteoroid.
5. The type of moon phase with more than half of the visible surface lit.
6. The phase of the moon that follows a full moon.
9. Means "growing" - follows the new moon as more light is gained.
13. The tide that occurs when the positions of the sun, moon, and Earth form a right angle.
15. The phase of the moon that follows a waxing crescent.
17. The umbra and penumbra are both part of this.
23. The tide with the greatest difference between low and high.