Science 6: Unit 2, Lesson 6 Nonrenewable Energy Resources

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Across
  1. 3. radioactive element used in nuclear fission to generate energy
  2. 5. a nonrenewable energy resource that forms from the remains of organisms that lived long ago
  3. 7. these remains form coal
  4. 10. lignite changes to this under heat and pressure; second type of coal formed
  5. 11. the solid fossil fuel most widely used to generating electrical power
  6. 12. a mixture of gaseous hydrocarbons
  7. 14. the energy released when the nuclei of atoms are split or combined
  8. 15. a natural resource that humans use to generate energy
Down
  1. 1. also known as crude oil
  2. 2. most valued type of coal and is highly valued for its carbon content which gives off the most energy and least pollutants
  3. 4. these remains form petroleum and natural gas
  4. 6. the splitting apart of radioactive atoms into two or more fragments
  5. 8. partially decayed swamp plants; first step in forming coal
  6. 9. generate electricity using nuclear fission
  7. 11. when neutrons are released from fission and bombard more nuclei which releases energy
  8. 13. peat changes to this under heat and pressure; first type of coal