1							2											3					4
																5
6																			7			8				9		10
																		11
	12			13																				14				15
						16																												17
				18																										19
			20																	21
																			22
23
																								24
25
																									26
																					27				28
			29
																														30		31
				32					33			34
						35																	36		37
38																			39
		40														41
						42																							43
44																																		45
									46						47								48
							49
											50
																										51
														52
																						53					54
55
															56
57															58

Across 1. The force the air exerts per unit area. 3. A type of magma rich in silica that forms light colored igneous rock. 6. A boundary between two plates that are moving towards each other. 9. The measure of the amount of energy released in an Earthquake. 11. An area of volcanic activity that results from a plume of hot solid material that has risen from a deep within Earth's mantle. 13. A process by which heat from Earth's inner and outer cores is transferred through the mantle. 15. Any mineral that has as its building block a tetrahedron of silicon and oxygen. 16. A convergent boundary where two continents have come together and are welded into a single larger continent. 19. The hot molten rock that forms beneath Earth's surface. 20. A long chain of mountains with a central rift valley that is located along a divergent boundary on the ocean floor. 22. The continuous circulation of water through the hydrospheres as solid, liquid or gas. 23. A boundary between two lithospheric plates that are moving apart. 24. A repeated series of events by which rock gradually and continually changes between idneous, sedimentary, and metamorphic forms. 25. A long narrow steep sided trough that runs parallel to continental margins or to volcanic island chains. 28. Rock formed by the cooling and hardening of magma. 29. A boundary between two plates that are sliding past each other. 34. The name of a hypothetical landmass consisting of all the continents welded together, which evidence indicates existed about 250 million years ago. 37. A large, rotating storm of tropical origin with sustained winds of at least 119 km/hr. 38. A hypothesis that Earth's continents move on Earth's surface. 41. A cone-shaped volcano formed from lava fragments that have been ejected from a volcanic vent. 42. A fan-shaped deposit that forms when a river flows into a quiet or large body of water. 46. A system in which energy can enter or leave, but matter cannot. 48. A discharge of electricity from a thundercloud to the ground, to another cloud, or to another spot within the cloud itself. 50. A river and all its tributaries. 51. Clouds that form in low, horizontal layers. 52. A large, crater-shaped basin formed after the top of a volcano collapses. 54. Waves of energy that travel from the focus of an Earthquake through the material of Earth's body. 55. A sheild-shaped vocano with a broad base and gently sloping sides that is made of basaltic lava. 56. The gaseous envelope of air surrounding Earth. 57. Rock that has undergone chemical or structural changes due to the effects of heat and pressure. 58. The shaking of Earth's crust caused by a release of energy.

Down 2. A convergent boundary where an oceanic plate is plunging beneath another, overriding plate. 4. Thick, fluffy clouds with flat bases, formed by vertically rising air currents. 5. The very thin outer layer of Earth above the mantle, composed of a rigid layer of lighter rocks that can exceed 65 km at its deepest point. 7. A violent, rotating column of air that extends down from dark clouds and moves overland in a narrow, destructive path. 8. A system in which there is a free exchange of both energy and matter between the system and its surroundings. 10. The rocks, mountains, lithospheric plates, and other physical features of Earth, except for water. 12. A volcano made of layers of hardened lava flows and pyroclastic material. 14. The layer of Earth's interior located between the inner core and the mantle; composed of iron and nickel in a liquid state. 17. Magma that reaches Earth's surface. 18. High-altitude clouds that are think, feathery tufts of ice crystals. 19. Type of magma rich in iron and magnesium and low in silica; forms dark colored igneous rock. 21. The thickest of Earth's layers, located between the outer core and Earth's crust, composed mostly of compounds rich in iron, silicon and magnesium. 26. All living organisms in the Earth system and their environments. 27. The solid innermost layer of the Earth, composed of iron and nickel under extremely high pressure and temperature. 30. The point at which the first movement occurs during an Earthquake. 31. A wind of Southeast Asia and the Indian Ocean tha changes direction seasonally; often accompanied by heavy rains. 32. The point on Earth's surface directly above the focus of an Earthquake. 33. The theory that the lithosphere is made of plates that move and interact with each other at their boundaries. 34. A dense, superheated cloud of gases and pyroclastic materials that moves rapidly downhill from an erupting volcano. 35. Broad, looping bends in a river. 36. A wide, level area that borders a river and is covered by its water duing a flood. 39. Rock formed by the compaction and cementing of layers of sediments. 40. The protection, restoration and management of natural resources. 43. A winter storm charectorized by winds exceeding 56 km/hr, temperatures of 27 degrees C or lower, and falling or blowing snow that reduces visibility. 44. A storm with rain, lightning, and thunder, and sometimes hail and tornadoes. 45. To collect and reuse materials from waste. 47. Earthquake waves that travel along Earth's surface. 49. An instrument that detects and records waves produced by Earthquakes. 53. A naturally occuring inorganic solid with a distinct chemical composition and crystalline structure.