Across
- 2. means rock oil and can be turned into oil and diesel
- 3. energy sources made from carbon-rich plant and animal remains
- 5. a resource that is an energy source that can easily be replaced by nature
- 8. an energy source that can be used in place of fossil fuels
- 9. the capacity to do work
- 10. gases that become trapped in rock formations
Down
- 1. energy in the form of heat that is extracted from within the earth
- 4. sedimentary rock formed from the remains of dead plants and animals
- 6. a resource that is an energy source that cannot be easily replaced by nature
- 7. energy made by converting gusts of wind into energy