1. 200 300 400 500 100 200 300 400 500 100 200 300 100 JKL

2. Islands that are formed over thousands of years and made of coral are called a. cays b. glaciers c. mountains d. corals

3. cays

4. This is a form of pollution in which chemicals come back to the earth as the form of rain, snow, or hail a. dirty rain b. acid wash c. acid rain

5. Acid rain

6. An area that has warm and cool seasons has a a. subtropical climate b. steppe climate c. highland climate d. temperate climate

7. Temperate climate

8. Environmental hazard produced by atomic power plants a. recycle b. nuclear waste c. continental drift d. desertification

9. nuclear waste

10. Theory that one huge continent broke apart and drifted to form the seven continents a. recycle b. nuclear waste c. continental drift d. desertification

11. continental drift

12. To make new products from old ones a. recycle b. nuclear waste c. continental drift d. desertification

13. recycle

14. Process in which land loses all vegetation a. recycle b. nuclear waste c. continental drift d. desertification

15. desertification

16. The growth of city population a. desalination b. global warming c. terrace farming d. urbanization

17. urbanization

18. Rise in Earth’s temperature a. desalination b. global warming c. terrace farming d. urbanization

19. global warming

20. The process of taking salt out of sea water a. desalination b. global warming c. terrace farming d. urbanization

21. desalination

22. Farming constructed in hilly regions, used to increase the amount of arable land. a. desalination b. global warming c. terrace farming d. urbanization

23. terrace farming

24. This sturdy piece of equipment was first built in Lancaster and was used to carry supplies to the pioneers a. Prairie schooner b. Horses c. Radio flyer wagon d. Conestoga wagon

25. Conestoga Wagon

26. What sea is drying up due to the increase of irrigation, used to grow crops in arid regions? a. Black Sea b. Aral Sea c. Lake Victoria d. Sea of Japan

27. Aral Sea