HEAT CROSSWORD

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Across
  1. 2. the transfer of radiant energy by means of electromagnetic waves
  2. 3. energy contained below Earth's surface
  3. 9. the balance between the energy lost by Earth into space and the energy gained by solar radiation trapped by Earth's atmosphere
  4. 12. concentrated sources of chemical energy such as coal, oil, and natural gases.
  5. 13. a theory that explains what matter is made of, and how it behaves
  6. 14. a measure of the average kinetic energy of the particles of a substance
  7. 15. the transfer of thermal energy through a substance, or between substances in contact, by the collision of particles
  8. 18. a source of energy that has been widely used for many years
  9. 19. the transfer of thermal energy from one part of a fluid to another by a circulating current of faster-moving and slower-moving particles
  10. 22. rock formed from magma that has cooled and solidified
  11. 24. heating caused by passage of radiant energy through the windows of a building
  12. 27. a decrease in the volume of a substance caused by cooling
  13. 28. a source of energy that could be eventually used up
Down
  1. 1. a rise in temperature resulting from certain gases in the lower atmosphere trapping radiant energy and warming Earth's surface
  2. 4. a device that harnesses radiant energy from the Sun and converts it into a more useful form of energy
  3. 5. a source of energy that is not as common as conventional sources
  4. 6. an increase in the volume of a substance cause by heating
  5. 7. a liquid fuel, such as ethanol, produced from plant or animal material
  6. 8. the total kinetic energy and energy of attraction of all the particles in a material
  7. 10. a force produced when an object runs up against each other
  8. 11. radiant energy produced at the Sun's outer surface and radiated out into space
  9. 16. an increase in Earth's global temperature due to changes in the atmosphere that enhances greenhouse effect
  10. 17. energy that all moving object possesses
  11. 20. rock that is formed when heat and pressure change existing rock
  12. 21. a source of energy that can be used indefinitely, without running out
  13. 23. energy that travels in the form of electromagnetic waves through empty space
  14. 25. gases such as vapor water, carbon dioxide, methane, and nitrous oxides that trap energy in Earth's atmosphere
  15. 26. te transfer of energy from the particles of a warmer object to the particles of a cooler object