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Across
  1. 2. Depeltion thinning of Earth's ozone layer caused by chlorofluorocarbons (CFCs) leaking into the air and reacting chemically with ozone, breaking the ozone molecules apart.
  2. 4. Resource energy resource that is replenished continually; natural resources, such as water, sunlight, and biomass, that are constantly being recycled or replaced in nature.
  3. 7. Resource parts of Earth's environment that supply materials useful or necessary for the survival of living organisms.
  4. 9. A hole in the ground that shoots out hot water and steam.
  5. 10. Precipitation precipitation: precipitation with a pH below 5.6—which occurs when air pollutants from the burning of fossil fuels react with water in the atmosphere to form strong acids—that can pollute water, kill fish and plants, and damage soils.
  6. 12. Resource natural resources, such as petroleum, minerals, and metals, that are used more quickly than they can be replaced by natural processes.
  7. 14. Earth's air, which is made up of a thin layer of gases, solids, and liquids; forms a protective layer around the planet and is divided into five distinct layers.
  8. 17. Power energy contained in atomic nuclei.
Down
  1. 1. Fuels nonrenewable energy resources—coal, oil, and natural gas—that formed in Earth's crust over hundreds of millions of years.
  2. 3. Energy heat energy within Earth's crust, available only where natural geysers or volcanoes are located.
  3. 5. movement of soil from one place to another.
  4. 6. Waste waste materials, such as pesticides and leftover paints, that are harmful to human health or poisonous to living organisms.
  5. 8. Power electricity produced when the energy of falling water turns the blades of a generator turbine.
  6. 11. Effect heat-trapping feature of the atmosphere that occurs when certain gases in Earth's atmosphere, such as methane, CO2, and water vapor, trap heat.
  7. 13. nonrenewable resource formed over hundreds of millions of years mostly from the remains of microscopic marine organisms buried in Earth's crust.
  8. 15. substance that contaminates any part of the environment.
  9. 16. produced from the splitting apart of billions of uranium nuclei by a nuclear fission reaction.