1						2					3
4		5							6
7						8
								9									10
													11
				12				13
			14
							15								16
			17
													18
															19
									20

Across 2. the atractive force between two objects. 6. darkest part of the moon's shadow, is cone shaped. 7. a bowl shaped area that forms around a volcano's central opening 9. dark, flat areas in the moon surface. 11. the different shapes of the mooon you see from earth. 13. the day of the year that marks the beginning of spring in the northern hemisphere 14. any natural or artificial object that revolves around an object in space. 17. the blocking of sunlight to earth that occurs when the moon is between the sun and earth. 19. the daily rise and fall of earth's waters. 20. study of the moon stars and other objects in space.

Down 1. the blocking of sunlight to moon that occurs when earth is directly between the sun and moon. 3. two lenses in a wooden tube. 4. occurs when an object in space comes between the sun and a third object and casts shadow on that object. 5. a measurement of of distance from the equator, expressed in degrees north or south. 8. the two days of the year in which the noon sun it directly overhead at either 23.5 south or 23.5 north. 10. largest part of the shadow. 12. earth spinning on its axis. 15. earth path as it revolves around the sun. 16. the movement of one object around another object. 18. the two days of the year on which neither hemisphere is tilted toward or away from the sun.