earth resources

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Across
  1. 2. the planting of one species in a feld
  2. 3. substances that can adversely affect the survival, health, or activities of organisms
  3. 6. environmental factors like disease, parasites, and lack of food, that afect population growth
  4. 7. a plant material that is compressed by the weight of water and by other sediments
  5. 10. resources materials or substances that the Earth provides
  6. 11. production of two usable forms of energy at the same time from the same process, which can conserve resources and generate income.
  7. 14. the restoring of land to its original contours and the replanting of vegetation
  8. 17. A gas mixture of methane and carbon dioxide produced by bacterial degradation of organic matter and used as a fuel.
  9. 18. environmental factors like storms, droughts, foods and pollution, that afect population growth
  10. 22. energy Involves global management of Earth's natural resources to ensure that current and future energy needs will be met without causing environmental damage
  11. 25. pattern of growth in which population grows faster as it increases in size.
  12. 27. A mixture of gravel, sand, and crushed stone that naturally accumulates on or close to Earth's surface.
  13. 30. resources resources that exists in a fxed amount in various places in Earth's crust and can
  14. 32. removal of trees from a forested area without adequate replanting
Down
  1. 1. resources natural resources that it is possible to use indefnitely without causing reduction in the available supply
  2. 4. Energy produced by naturally occurring steam and hot water
  3. 5. cell Thin, transparent wafers made up of layers of boron- and phosphorus-enriched silicon that when exposed to sunlight produce an electrical current.
  4. 8. the use of organisms to clean up toxic wastes
  5. 9. accumulate above it turning it into a light, spongy material
  6. 12. a gasoline and ethanol mixture used in conventional gasoline engines
  7. 13. energy sources that formed over geologic time as a result of the compression and partial decomposition of plants and other organic matter (two words)
  8. 15. a natural resource that can be mined for a proft
  9. 16. process of removing salt from salt water through distillation
  10. 19. yield replaced through natural processes at the same rate as it's being used
  11. 20. a wide variety of diferent species (plants and/or animals)
  12. 21. the number of organisms that any given environment can support (hint _______ capacity
  13. 23. be replaced by processes that take hundreds of millions of years
  14. 24. occurs when pollutants in air are at quantities that become harmful to the health of humans and the environment.
  15. 26. minerals left after an ore is extracted that may release harmful chemicals into ground water or surface water
  16. 28. efficiency the use of energy resources in the ways that are most productive
  17. 29. the process whereby productive land becomes desert
  18. 31. solid unweathered rock lying beneath surface deposits of soil