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

Across 1. In biology, a combination of organs and tissues that perform a shared complex function (e.g., digestive system); the specific object or group of objects under observation 4. A disruption of the ocean - atmospheric system that is opposite to that of El Nino, characterized by an increase in the strength of westward moving winds 6. The solid outer later of Earth's surface, including the crust and upper part of the Earth's mantle 9. The circulation of water among the oceans, land, and the atmosphere 11. The lowest layer of the atmosphere, reaching from Earth's surface (0km) to 12km above the surface 13. Everything other than the system under observations 16. A current of moving air blowing from land onto an ocean or large lake 17. the ability of a surface to reflect light 18. A term referring to all water temporarily frozen in polar ice caps, snow, permafrost, and glaciers 21. A term referring to all the water on or near Earth's surface 23. The retention of heat on and above Earth's surface by greenhouse gases 24. The later of the atmosphere located 13 and 50km above the Earth's surface 25. The quantity of energy required to increase the temperature of 1g of a substance by 1 degrees Celcius 32. Accumulations of water droplets, found mostly in the troposphere 33. The tilt of Earth's axis; the angle of the equator with respect to the plane of Earth's orbit around the Sun 34. A system that allows energy, but not matter to cross the system's boundary 35. The energy and temperature balance maintained on Earth by radiating the same quanity of energy into space as it absorbed by the Sun 36. A greater force per unit area that the air would exert on a surface 37. The conditions of temperature, atmospheric pressure, humidity, and precipitation at a particular time and place 38. A system that allows neither matter not energy to flow across the system's boundary

Down 2. A disruption of the ocean - atmospheric system in the tropical Pacific that typically occurs every 3 to 7 years 3. The thin layer of air, land, and water on or near Earth's surface that contains all life on Earth 5. Gases that absorb infrared radiation released from Earth's surface and transmit it as hear in all directions, including back to Earth's surface 7. Precipitation that develops when warm, moist air cools and condenses as it rises against mountains 8. A physical change from one state to another 10. The tendancy of convection currents or other moving objects on the surface of Earth to weer sideways from their original course due to Earth's rotation on its axis 12. A mixture of nitrogen and oxygen and other gases that extend 800km above Earth's surface 14. A current of moving air blowing from an ocean or large lake towards land 15. The mechanism of energy transfer in which atoms or molecules emit electromagnetic waves 19. The quantity of energy required to melt one mole of a substance 20. The quanitity of energy required to convert one mole of a substance from a liquid to a gas 22. The name for the Gulf Steam, a large surface current in the ocean, at the point where it reaches the British Isles 26. A lesser force per unit area that the air would exert on a surface 27. A region that recieves little rain because it is situated on the side of a mountain farthest from the prevailing winds 28. Currents of extremely fast moving air located 10-15km above Earth's surface 29. A system that allowed energy and matter to cross the system's boundary 30. A large surface current in the ocean that follows the eastern coastline of the United States and Canada, and then moves across the Atlantic towards Europe 31. A change in state from a solid directly to a gas, or from a gas to a solid 32. The trend in temperature, atmospheric pressure, humidity, and precipitation over a period of many years