Across
- 4. the act of cutting down trees and clearing forests
- 7. well-engineered manner of watering agriculture
- 9. tropical grasslands with scattered vegetation primarily located on the African continent
- 10. a very large expanse of sea
- 12. a natural fuel such as gas or coal
- 14. the point on the Northern Hemisphere of the earth that is farthest North
- 17. a change in global or regional climate patterns
- 19. a steep rock face
- 21. a vast and treeless region located in the Arctic and subarctic regions of the world such as Green, Europe, and North America
- 23. a triangular plain at the end or mouth of a river where the soil is deposited
- 25. a large area covered chiefly with trees and undergrowth
Down
- 1. the gradual increase in the Earth's temperature
- 2. a group of islands
- 3. imaginary vertical lines used to determine exact geographic coordinates that run along the eastern and western hemisphere of the earth
- 5. the process by which natural forces such as wear away rocks,soil,and other surface materials
- 6. the damp heaviness in the air
- 8. deep valley with steep sides
- 11. the envelope of gases surrounding the earth
- 13. all living or non-living things occurring naturally
- 15. a large slow-moving mass of ice
- 16. imaginary horizontal lines on the Earth that are utilised to specify the north or south
- 18. a biological community of interacting organisms
- 20. a body of water that lies between a reef and a coastline
- 22. a prolonged time with less than average rainfall
- 24. the sliding down of a mass of earth or rock from a cliff