Geography Revision

2. The layer of gases surrounding the earth
5. This biome has high rainfall and very hot temperatures
6. A very large ecosystem made up of specific vegetation types and specific fauna
8. This biome has long severe winters and short cool summers
11. This biome has a wet winter and a dry summer
13. security Having reliable access to enough nutritious and affordable food
15. The solid part of the earth's crust
17. Parallel lines running East-West around the earth

1. This biome is very dry and has a large daily range in temperature
3. Conservation strategy using steep slopes
4. S_____________ agriculture: environmentally-friendly farming methods
7. A community of species and its non-living environment
9. C_____________ planting: conservation strategy taking advantage of contour lines
10. All of earth's water bodies
12. Lines running North-South that meet at the poles
14. The sum of all the earth's living systems
16. S________ cropping: conservation strategy involving planting alternating strips of crops in various stages of growth