Across
- 8. rain, snow, sleet, or hail that falls to or condenses on the ground
- 9. a thick subsurface layer of soil that remains below freezing point throughout the year, occurring chiefly in polar regions
- 11. the science or practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products
- 13. an overflow of a large amount of water beyond its normal limits
- 14. substance discharged into the air, especially by an internal combustion engine
- 18. The degree or intensity of heat present in a substance or object
- 19. an extremely large, powerful, and destructive storm with very strong winds
- 20. an area of land that rises very high above the land around it and that is higher than a hill
Down
- 1. the act or process of introducing new ideas, devices or methods
- 2. change in behavior of a person or group in response to new or modified surroundings.
- 3. a sudden violent shaking of the ground, typically causing great destruction, as a result of movements within the earth’s crust or volcanic action
- 4. suitable or good enough to live in
- 5. the quality or state of being exposed to the possibility of being attacked or harmed, either physically or emotionally
- 6. the study and knowledge of the practical use of scientific discoveries
- 7. restored or replaced by natural processes : able to be replaced by nature
- 10. period of dry weather that is injurious to crops
- 12. a large area of land covered with trees and plants
- 15. a violent disturbance of the atmosphere with strong winds and usually rain, thunder, lightning, or snow
- 16. related to or determined by the sun
- 17. a system or means of conveying people or goods from place to place