Energy and Technology Crossword

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Across
  1. 3. What was the major source of energy in the nineteenth century?
  2. 4. The major source of energy in the twentieth century
  3. 5. the land, sea and air of our world.
  4. 8. the electronic ________________ sends information from telephones, TVs, and computers.
  5. 10. What the electronic superhighway sends
  6. 11. tool that provides high-energy beams of light.
  7. 12. without energy, this cannot be done.
  8. 13. technology has improved it with surgery and lasers.
Down
  1. 1. energy makes _______________ work.
  2. 2. making water, air, or land unclean and unhealthy.
  3. 6. what the photoelectric cell produces
  4. 7. the ___________________ cell can produce electricity from light.
  5. 9. They have designed new cars and invented medical machines.