Across
- 1. Four-fiths of the volume of the atmosphere
- 3. Average weather in a place over many years
- 5. Resources that are dependent on regrowth
- 9. A substance charged into the air
- 11. the part of the invisible spectrum
- 12. Dioxide produced through combustion and respiration
- 15. the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water.
- 17. a colorless, odorless, flammable gas
- 18. Areas on Earth where in layers of rock and soil never rise above freezing point
- 19. Effect Warming of earth caused by greenhouse gases
- 21. The land masses on Earth
- 22. Receding of glaciers
- 25. Fuels which contain carbon of plants and animals that are dead
- 27. The conditions in the atmosphere
Down
- 2. A thick layer covering a large area for a long period of time
- 4. Leaves an object in form of waves
- 6. Global conveyor belt
- 7. fuel, as wood or ethanol, derived from biomass.
- 8. Removal of large forest areas
- 10. All the liquid water on the earths surface
- 13. layers of gases surrounding the planet
- 14. Opposite of evaporation
- 16. The process of water molecules escaping the surface of the Earth and entering the atmosphere
- 20. All living things on Earth
- 23. Complex set of relationships
- 24. Infrared radiation
- 26. What causes drought in parts of Australia