Energy Crossword

1234567891011
Across
  1. 4. total mass of organisms in a given area or volume
  2. 7. released through natural convection
  3. 8. Formed from remains of living organisms
  4. 10. Nonrenewable resources are _______
  5. 11. cars with a high this can help conserve energy
Down
  1. 1. fossil fuel predicted to run out in 2081
  2. 2. Amount of carbon emissions that come with renewable resources
  3. 3. has been used for thousands of years
  4. 4. what biomass is called when converted into liquid fuels
  5. 5. Solar energy used to heat either liquid or air
  6. 6. Reaction through radioactive decay process
  7. 9. energy used by converting the suns rays