Across
- 4. natural resources that people use for energy
- 5. all of the Earth’s air
- 9. the process by which water seeps through the ground and enters an aquifer
- 11. heat energy that comes from deep within Earth
- 13. a natural resource that cannot be replaced as quickly as it is used
- 17. a situation that involves giving something up in return for gaining something else
- 21. a natural resource that is only renewable if it is not used too quickly
- 22. all of the Earth’s rocks, minerals, and soil
- 23. rocks that allow liquid or gas to pass into and through them
- 24. resources obtained from the natural world that are used by humans for survival and to improve the quality of their lives
- 25. the loss of healthy soil and expansion of deserts, typically caused by soil pollution, repeated growth of nutrient-depleting crops in the same fields, strip mining, overgrazing cattle, clearing forestland, etc.
- 26. fuel made from biomass (plant matter, such as wood or crop waste)
- 27. a mineral deposit that has a high enough concentration of a specific mineral to be worth mining and processing
- 29. plant matter that can be burned for heat or used to make other fuels
- 30. the concentration of resources in specific places because of the processes by which they form
- 31. a natural resource that can be replaced at the same rate it is used, or faster
- 32. a result that follows naturally from the actions of a person or group; can be positive or negative; can be short-term or long-term
Down
- 1. rocks that do not allow water or other fluids to flow through them; prevent groundwater from entering or leaving aquifers
- 2. all of the Earth’s water
- 3. resources formed from the buried remains of plants and animals; coal, petroleum/oil, and natural gas
- 6. energy created from the atomic decay of an element, such as Uranium
- 7. a natural resource whose supply is not affected by human activity; can’t be used up
- 8. die out completely
- 10. all of the the Earth’s living things
- 12. electric energy generated when water flows through a hydroelectric dam to turn the blades of a turbine
- 14. also called REEs, these are elements found deep within Earth that are difficult and costly to mine; widely used in electronics, batteries, magnets, etc.
- 15. electrical energy generated when a windmill uses moving air to turn the blades of a turbine
- 16. the nutrient-rich layer of soil at the surface, formed as organic matter is added from decomposing organisms
- 18. natural resources humans use to make objects or to eat as food
- 19. energy from the sun is absorbed and converted to electrical energy
- 20. loose mixture of sediment, organic material, water, and air
- 28. layers of permeable rock beneath the surface where groundwater flows or is stored