Across
- 1. Brownish haze of ground level ozone
- 5. Device used to measure air pressure
- 6. Measurement of how acidic or basic a substance is
- 8. Science of studying the weather
- 12. Balloon used to measure weather high in air
- 13. A prolonged period of extensively hot weather
- 18. Pollutants created in the air
- 20. Device used to measure temperature
- 21. Electromagnetic waves that can cause cancer
- 22. Substances with a pH lower than 7
- 23. Instruments that orbit Earth & track weather
- 25. Pollutants emitted directly into air
Down
- 2. Compounds that break down ozone
- 3. Air pollution by a mixture of smoke and fog
- 4. Device used to measure wind speed
- 7. Device used to measure humidity
- 9. Tracking system used to locate rain & storms
- 10. Rain, snow, fog with a pH below 5
- 11. Substances with a pH of 7
- 14. When urban areas are hotter than rural
- 15. Molecule consisting of three oxygen atoms
- 16. Layer of ozone in the stratosphere
- 17. Substances with a pH higher than 7
- 19. Formed when sulfur dioxide mixes with rain
- 24. Formed when nitrogen oxide mixes with rain