crossword puzzle

2. energy energy created from the wind
4. gas a mixture of methane and other gases
6. energy energy from the sun
7. power power from moving water
9. energy energy from the sources that are constantly being formed
12. power energy that created from within the earth's crust
13. conservation makes an effort to reduce the amount of energy used some waste can be avoided
14. efficiency the amount of useful energy produced compared to the amount wasted as heat built into the device or system, unavoidable waste
15. solar heating uses suns energy to heat something directly

1. power/fuel major resource in developing countries
3. resources a natural resources that cannot be re-made or re-grown at a scale comparable to their consumption
5. solar heating solar cells are to collect the suns energy and then convert it to electricity or heat water
8. cells are used to convert the suns energy into electricity
10. energy nuclear fission uses uranium to create energy
11. resources an energy source that cannot be depleted and are able to supply a continuous source of clean energy