Across
- 2. period of 10 years
- 4. thing from which something comes or can be obtained
- 6. solid, gas or liquid that can be burned for energy
- 7. a place where electricity is made
Down
- 1. endless
- 2. fuel for an internal combustion engine
- 3. a form of energy resulting from the existence of charged particles
- 5. a viscous liquid derived from petroleum