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Across 2. The moving of air around a low pressure. 5. Water falling from clouds in any form. 6. An increase in the world's average temperature, possibly caused in part by fossil fuel use. 8. Large bodies of air that have the same temperature and humidity. 10. Flow of water within the ocean that moves in regular pattern. 12. Conditions in the atmosphere. 13. Measure of the average kinetic energy of the particles in a substance. 15. A shorthand way of recording weather at a particular weather station. 18. Lowest layer of earths atmosphere. 19. When saturated air cools, the water vapor will condense into liquid water. 20. Unusually warm ocean current that occurs in the eastern pacific near the equator. 21. Caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink. 22. Amount of water vapor in the air. 23. The height of an object or point in relation to sea level or ground level. 24. Form of oxygen that has three atoms in one molecule. 25. The weather conditions prevailing in an area in general or over a long period.

Down 1. Amount of water vapor in the air compared to the amount in saturated air at the same temperature. 3. Cycle in which Water moves through the environment. 4. A visible mass of condensed water vapor floating in the atmosphere, typically high above the ground. 7. Movement of air caused by differences in air pressure. 9. The envelope of gases surrounding the earth or another planet. 11. A wind that blows steadily in the same direction across thousands of kilometers. 14. Atmospheric pressure: the pressure exerted by the atmosphere. 16. A area or boundary where two different air masses come together. 17. Narrow stream of high speed wind high in the atmosphere.