Energy transfer

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 2. The absence of matter (6)
  2. 3. Energy that makes things warm (4)
  3. 5. A tiny piece of anything (plural) (9)
  4. 7. The star our planet orbits (3)
  5. 9. How tightly packed the matter in something is (7)
  6. 12. Energy that travels in waves or particles (9)
  7. 13. The vast area beyond Earth's atmosphere (5)
  8. 14. Rolling swells on the sea (5)
  9. 15. The transmission of heat or electricity or sound (10)
  10. 16. An elementary particle with negative charge (plural) (9)

Down

  1. 1. A flow of electricity through a conductor (plural) (8)
  2. 4. A substance that is ___ at room temperature and pressure (plural) (6)
  3. 6. The transfer of heat through a fluid caused by molecular motion (10)
  4. 8. Any of several chemical elements that are usually shiny solids that conduct heat or electricity (plural) (6)
  5. 10. People who are ___ (4)
  6. 11. A material such as glass or porcelain with negligible electrical or thermal conductivity (plural) (10)