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Across 3. A possible future energy source is an 12. Saving energy 13. Energy sources that are still in development 14. Oil that is pumped from the ground is

Down 1. Organic matter that is used as an energy source 2. Energy from sources that are constantly bein formed 3. A collision that causes the nuclei to split 4. The energy within the nucleus of a atom 5. the percentage of energy put into a system that does useful work 6. Energy produced from moving water 7. Uses the sun's energy to heat something directly 8. produces electricty chemically by combinding hydrogen fuel with oxygen 9. remains of ancient organisms changed into coal, oil, or natural gas 10. The energy from heated by energy within th earth 11. Energy from the sun can be gathered by collectors and used to heat water