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Across 1. the boundary between two unmoving air masses 5. a complex weather area where a cold front has overtaken a warm front 6. a device used to measure air pressure 7. cold air mass entering an area of warm area 8. air pressure 9. the boundary between two air masses 10. warm air mass entering an area of cold area

Down 2. the force os air molecules against an object 3. an area where air where the air is denser than the surrounding air 4. areas where air is not as dense as the surrounding air