Across
- 2. a natural underground layer of rock or sediment that stores water and allows it to flow, often tapped for drinking water
- 4. defined as an envelope of air, gases, and suspended articles surrounding the earth
- 6. a deep valley with steep sides, often carved by river erosion, such as the Grand Canyon in the United States
- 7. the area or region where a species of animals or plants reside
- 11. a prolonged time with less than average rainfall which can negatively affect living conditions
- 13. a well-engineered manner of watering agriculture
Down
- 1. a group of islands such as the Galapagos or Hawaii
- 3. Type of drift that explains the gradual movement of Earth's continents over geological time due to plate tectonics
- 5. known as a biological community of interacting organisms and their physical environment working together and interacting as one whole system
- 8. the vertical height above the sea level
- 9. the process by which natural forces such as wind, water, or ice wear away rocks, soil, and other surface materials
- 10. a large, slow-moving mass of ice formed from compacted layers of snow, found in polar regions and high mountains
- 12. a low-lying area on the Earth's surface, often surrounded by higher land, where water collects or flows into a river system