Energy charecteristics

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Across
  1. 5. to reduce the amount of resource that is available
  2. 6. easy to store
  3. 7. The amount of energy in a particular mass of fuel or that can be harnessed by a particular mass of equipment
  4. 8. Extremely high energy density
  5. 11. A resource that is renewed so slowly that the amount available for use is effectively
  6. 13. very reliable
Down
  1. 1. An energy source where its availability can be predicted
  2. 2. is the resource coming from a unstable source
  3. 3. as technology of a resource improves it gets ____________
  4. 4. if an energy resource is not available all the time
  5. 9. intermitten resource
  6. 10. low energy density
  7. 12. the issue of the appearance