Earth, Moon, Sun

6. The partial or total blocking of one object in space by another
9. The spinning motion of a planet on its axis
10. The movement of an object around another object
11. The attractive force between objects; the force that moves objects downhill
12. The scientific law that states that every object in the universe attracts every other object
15. Either of the two days of the year on which the Sun reaches its greatest distance north or south of the Equator
17. The periodic rise and fall of the level of water in the ocean
18. scientific law that states that an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force
21. One of the different apparent shapes of the Moon as seen from Earth
22. the amount of matter in an object

1. A system of organizing time that defines the beginning, length, and divisions of a year
2. Either of the two days of the year on which neither hemisphere is tilted toward or away from the Sun
3. Tendency of an object to resist a change in motion
4. A measure of the force of gravity acting on an object
5. Blocking of sunlight to the Moon if that occurs when Earth is directly between the Sun and the Moon
7. The tide with the greatest difference between consecutive low and high tides
8. The blocking of sunlight to Earth that occurs when the moon is directly between the Sun and Earth
13. An imaginary line that passes through a planet center and it's North and South poles, about which the planet rotates
14. The path of an object as it revolves around another object in space
16. The tide with the least difference between consecutive low and high tides
19. Push or pull exerted on an object
20. The darkest part of a shadow
21. Part of a shadow surrounding the darkest part