Energy and Technology Crossword

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