crossword puzzle

5. nuclear fission uses uranium to create energy
6. energy from the sun
7. an energy source that cannot be depleted and are able to supply a continuous source of clean energy
9. energy from the sources that are constantly being formed
13. the amount of useful energy produced compared to the amount wasted as heat built into the device or system, unavoidable waste
14. a natural resources that cannot be re-made or re-grown at a scale comparable to its consumption
15. energy that created from within the earth's crust

1. uses suns energy to heat something directly
2. energy created from the wind
3. are used to convert the suns energy into electricity
4. power from moving water
8. major resource in developing countries
10. making an effort to reduce the amount of energy used..some waste can be avoided
11. a mixture of methane and other gases
12. solar cells are to collect the suns energy and then convert it to electricity or heat water