Science

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Across
  1. 3. A pipe that feeds into a turbine within a hydropower dam
  2. 4. To make smaller or lessen in size
  3. 6. Use material again
  4. 7. The movement of materials due to differences in temperature
  5. 8. Photovoltaic cells that turn sunlight directly into electricity
  6. 9. A clean,renewable energy source that is generated from wind
Down
  1. 1. Fuel source made from biomass
  2. 2. To use more than once
  3. 4. Located on top of a solar power tower
  4. 5. Electricity generated from moving water