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Across 3. A tool that measures how humid the air is. 6. The invisible "shield" that protects the earth from harmful solar radiation. 9. Stratopause & UV protection. (2 Words) 10. Any swirling spiral motion of fluid in a small area.

Down 1. A tall cloud which produces thunderstorms, hailstorms, or just heavy rain. 2. Change in the frequency of sound waves as the source moves past the observer. (2 Words) 4. The system of winds which is always blowing all around the world. (2 Words) 5. A dense flow of air that moves as the hands of a clock do, in the northern hemisphere. 7. The special name for a local, very violent thunderstorm. 8. The technique used to locate objects by using radio waves.