Energy and Technology Crossword

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