Physical Science Chapter 23 "Using Natural Resources"

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Across
  1. 5. A toxic chemical that is as byproduct of paper manufacturing; it has been linked to certain types of cancer. (23-3)
  2. 7. A fossil fuel that is a mixture of many substances that comes out of the ground as a tar-like liquid; gasoline, diesel fuel, kerosene, etc. are extracted from it. (23-2)
  3. 10. The replacement of one type of community by another at a single location over a period of time. (23-1)
  4. 11. The energy produced by heat within the earth that is used to produce electricity; only good in areas where molten rock is somewhat close to the earths surface. (23-2)
  5. 15. A group of organisms of one type in a certain area. (23-1)
  6. 16. An individual living thing. (23-1)
  7. 18. The capacity of certain gases in the atmosphere to trap heat, thereby warming the Earth (23-3)
  8. 19. A term that describes all of the living organisms in a community or ecosystem. (23-1)
  9. 20. Type of smog (air pollution) that forms from the interaction between chemicals in the air and sunlight (23-3)
  10. 22. An undesirable change in the natural environment that is caused by the introduction of substances that are harmful to living organisms or by excessive wastes, heat, noise, or radiation. (23-3)
  11. 23. A gradual increase in average global temperature due to the release of huge amounts of greenhouse gases by humans. (23-3)
  12. 25. All of the ecosystems on the earth. (23-1)
  13. 28. fuel Coal, oil, natural gas, and other fuels that are ancient remains of plants and animals; a non-renewable resource. (23-2)
  14. 29. A type of fossil fuel that is a gas at room temperature and is used to heat homes and cook food. (23-1)
Down
  1. 1. an incidental or secondary product made in the manufacture or synthesis of something else. (23-3)
  2. 2. An insecticide that was used in the United States in the 1970's, but banned because of harmful effects on birds and other animals. (23-3)
  3. 3. species that enter new ecosystems and multiply, harming native species and their habitats. (23-1)
  4. 4. a colorless, odorless, and poisonous gas produced by the incomplete burning of fossil fuels in cars, trucks, buses, etc. (23-3).
  5. 6. A resource that forms at a rate that is much slower than the rate at which the resource is consumed. (23-2)
  6. 8. An increase in the amount of nutrients, such as nitrates, in a marine or aquatic ecosystem; can lead to huge algal blooms and eventual death of aquatic organisms. (23-3)
  7. 9. A solid type of fossil fuel that is mined and used as a source of producing electricity. (23-1)
  8. 12. A group of various species that live in the same habitat and interact with each other. (23-1)
  9. 13. A renewable, clean source of energy from moving water that flows through a turbine causing it to spin and generate electricity. (23-2)
  10. 14. A tendency for living things to maintain a balanced or constant internal state despite changing external conditions. (23-1)
  11. 15. powerful chemicals that kill crop destroying insects, but can pollute water if washed into bodies of water by rain. (23-3)
  12. 17. The non-living components of an ecosystem. (23-1)
  13. 21. A non-renewable, clean source of energy that is produced by controlling fusion reactions between atoms. (23-2)
  14. 24. A renewable, clean source of energy that is available as a result of temperature differences in the air. (23-3)
  15. 26. A group of organisms and their abiotic (non-living) environment. (23-1)
  16. 27. A renewable, clean source of energy from the sun that is converted into thermal or electrical energy. (23-2)