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

Across 1. study of Earth's oceans and its creatures 3. all Earth's organisms and the environments in which the live 5. a idea that represents the idea being explained 8. study of interactions of humans with the environment 12. factor in an experiment that can change 13. a well tested explanation for a wide range of observations 14. the part of the Earth from its surface to its center 15. study of objects above Earth's atmosphere 16. study of materials that make up the Earth

Down 2. factor that is manipulated during an experiment 4. a series of problem solving procedures that help scientists conduct experiments 6. the frozen portion of water on Earth's surface 7. the study of the atmosphere, which is the air that surrounds the 9. a principle that describes the behavior of natural phenomenon 10. all the water on Earth 11. blanket of air that surrounds the Earth