Across
- 1. White objects __ light
- 3. Climate near equator where weather is hot
- 4. Measures humidity
- 7. Removing wide area of trees
- 8. Thin layer of gases surrounding Earth
- 12. Rural area
- 13. Measures wind speed
- 15. Urban area
- 18. Farming
- 19. Hunting and gathering
- 20. Climate with warm, wet winters, hot, dry summers
- 21. Measures atmospheric pressure
Down
- 2. Rigid layer, uppermost part of mantle
- 5. Climate above tree line and cold, icy, snowy, windy
- 6. Gasses released into the air, especially by cars and factories
- 9. Harmful material that can enter the biosphere
- 10. Process of removal
- 11. One who studies climates
- 13. Dark objects __ light
- 14. Measures precipitation
- 16. Gases surrounding Earth
- 17. Measures wind direction