1. A deep narrow valley with steep sides.

2. __ are underground layers of rock or sand that trap water.

3. Dry land with little precipitation.

4. A line that measures how far north or south from the equator a place is.

5. This river carved the Grand Canyon

6. To change in order to survive in the environment.

7. Lines of ___ measure how east or west from the Prime Meridian a place is.

8. A liquid fossil fuel often referred to as oil

9. This “colorful” desert in found in northern AZ and NM.

10. A long period of little or no precipitation.

11. This desert is found in the southern part of Texas into Mexico.

12. 0 degrees longitude.

13. A canal or pipe that carries water to cities and farms

14. Meridians are to longitude as __ are to latitude.

15. A deep narrow valley with steep sides found in Arizona.

16. A __ is a place where underground water reaches the surface.

17. Parallels are to latitude as __ are to longitude.

18. The Gulf ___ Plain is found along the Texas coast.

19. A hill with a flat top, smaller than a plateau

20. Longitude and latitude are measured in this unit.

21. The large desert found in southwest Arizona.

22. A small flat topped hill

23. ___ oil is petroleum that comes from the groud.

24. A special type of factory that turns crude oil into refined products like gasoline or heating oil.

25. 0 degrees latitude.

26. ___ are man made substances that are produced from petroleum.

27. 90 degrees north.

28. This water feature separates Texas from Mexico.

29. The slow wearing away of the land by wind or water

30. The major plateau found in the southwest in part of AZ and NM.