Energy and Technology Crossword

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