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Across 3. One way that carbon is stored in the ground, and kept out of the atmosphere. Starts with "N." 478 4. Three things affect the weather: Temperature, Moisture, and this ___. 504 7. The layer of the atmosphere in which we live and where weather occurs. 483 8. Everyday household product that once contained CFCs. 485 12. Name give when two air masses collide. 508 13. Planet with a dense CO2 (or Carbon Dioxide) atmosphere--the "love" planet. 15. Cooling Unit used in the Summer that once contained deadly CFCs. 485 16. The element (and gas) that is 78% of Earth's Atmosphere.pg. 477 19. Thin, whispy cloud high up in the sky. 506 20. Big, fluffy cloud that forms over hot air. Often goes away (or dissipates) at night. Starts with "C." 505 21. A tool (or technology) to meaure Pressure in the Atmosphere. 480 22. Hurricanes needs wind _____ of at least 74 miles per hour to start. 23. At high altitudes (for example Mountain Tops and Airplanes) the atmospheric pressure is low. This is becuase there is less air _____. Starts with "M." 482

Down 1. When this dies and decays, it releases Nitrogen into the atmosphere. 477 2. When more energy stays in the atmosphere then leaves, this changes the "energy budget" and causes this effect. Starts with a "G." 487 5. Atmosphere that contains the Ozone layer. 484 6. Famous African-American scientist (and Olympic winner) who showed that charge could be used to clear smoke form a building. 507 8. Type of storm that forms over 81oC water. Consists of a low pressure center surrounded by rotating winds. 512 9. As you go higher in _____, the atmospheric pressure decreases rapidly. 482 10. Element (and gas) that is 21% of Earth's Atmosphere. Given off by plants during photosynthesis. 11. Hottest layer of the atmosphere. 483 14. Coldest layer of the atmosphere. 484 17. Small "convection currents" in the atmosphere. Birds get a free ride on them upwards. Starts with "T." 499 18. Solve this riddle: I only exist if I'm hot and I'm cold; everyone fears me until I grow old. What am I? 19. Abbreviation for Chloro-fluoro-carbon. 485