Across
- 2. A flat elevated area of land.
- 4. A natural resource used as fuel and in manufacturing.
- 5. High, elevated landforms that rise sharply from the surrounding land.
- 8. Extremely cold climate found near the poles.
- 9. Seasonal winds bringing heavy rain to some regions.
- 11. A shortage or limited supply of resources.
- 13. Climate characterized by hot summers and cold winters, usually inland.
- 14. Extremely dry regions with sparse vegetation.
- 15. Violently rotating columns of air touching the ground.
- 18. Areas of land saturated with water, such as swamps and marshes.
- 19. Very dry weather with little rainfall.
- 20. The labor force; people available to work.
- 21. Large, slow-moving masses of ice on land.
Down
- 1. A zone of frequent earthquakes and volcanoes around the Pacific Ocean.
- 2. Large, flat areas of land with few trees.
- 3. A barrier built to hold back water and create a reservoir.
- 6. To alter the environment.
- 7. The continuous movement of water through evaporation, condensation, and precipitation.
- 10. Large bodies of saltwater smaller than oceans.
- 12. Giant ocean waves caused by underwater earthquakes.
- 16. Stepped fields built on hillsides for growing rice.
- 17. Materials from nature used by humans, like minerals and forests.