Across
- 2. camel large pack animal with one hump
- 4. to put at risk
- 6. rapid depletion of plant life and top soil
- 8. period of greatly reduced precipitation
- 9. able to produce crops or sustain agriculture
- 11. having to do with the formation with the earth
- 13. islands long, narrow strip of sandy land built up by waves and tides
- 14. plants associated with an area or time period
- 16. dry
- 18. the flat low-lying plain that sometimes forms the mouth of a river
- 19. to save or use wisely
- 20. vast area covered with sand dunes
Down
- 1. ecosystems with large flat areas of grasses
- 3. area of land that receives no more than 25 centimeters of precipitation a year
- 5. imaginary line around the earth, another planet, or star
- 7. having to do with factories
- 10. the art and science of cultivating land for growing crops
- 12. desert landscape with rocky plateaus and little soil, sand, or vegitation
- 15. solid rock beneath the earths soil and sand
- 17. rugged or rocky