Solar Airplanes

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Across
  1. 1. Fuel is sometimes measured in ______.
  2. 4. Their solar-powered airplane ______ less than a car.
  3. 7. Solar-power does not cause _________.
  4. 9. Sunlight provides _____-_____.
  5. 10. Solar-power makes ________ power from sunlight.
  6. 11. Piccard & Borschberg ________ flew a solar-powered airplane.
  7. 12. Piccard & Borschberg will build _______ solar-powered airplane.
Down
  1. 2. __________ is improving every day.
  2. 3. Piccard & Borschberg ____ from Europe to Africa.
  3. 5. A ___ is a type of airplane.
  4. 6. The airplane will ____ at the airport.
  5. 8. Some day, __________ airplanes might run on sunlight.