Across
- 1. A tropical cyclone with sustained winds of 74 miles per hour or higher.
- 8. Rotation The practice of growing different crops in succession to preserve soil health.
- 10. Geography The study of the spatial relationships between humans and the natural world.
- 12. Chlorofluorocarbons.
- 13. A sudden and violent shaking of the ground.
- 14. Farming A system of agriculture involving large-scale farms.
- 17. A severe shortage of food, often leading to widespread hunger.
- 18. The ability to meet the needs of the present without compromising the ability of future generations to meet their own needs.
- 19. Ring of Fire A region around the Pacific Ocean known for its high frequency of earthquakes and volcanic eruptions.
- 21. A method of extracting oil and natural gas from shale rock.
- 24. The process of transforming a society from agrarian to industrial.
- 26. Gasses Gases that trap heat in the Earth's atmosphere.
- 27. Mining A method of mining involving the removal of a layer of earth to extract resources.
Down
- 2. The artificial application of water to land.
- 3. A very large and powerful storm.
- 4. Warming The long-term heating of Earth's climate system.
- 5. Erosion The wearing away of the topsoil by wind, water, or other natural agents.
- 6. Building The construction of barriers to control the flow of water.
- 7. The process by which fertile land becomes desert.
- 9. Resources Resources that can be replenished naturally.
- 11. A large wave caused by an underwater earthquake or volcanic eruption.
- 15. Rain Precipitation that is unusually acidic due to atmospheric pollution.
- 16. The depletion of fish populations due to excessive fishing.
- 20. A prolonged period of abnormally low rainfall.
- 22. Genetically modified organisms.
- 23. Layer A layer in the Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation.
- 25. Agricultural Revolution The transition from hunting and gathering to sedentary agriculture.