Energy: Fossil Fuels Crossword

1. Most abundant fossil fuel.
4. Fractional distillation of ________, also called crude oil, makes fractions of various uses.
7. Once you use a fossil fuel it is gone.
9. Common additives used to increase the octane rating of fuels.
10. Used to trap valueable molecules with high octane numbers.
11. The ____________ of a fuel can be determined from its octane number.
16. The _________ of biological compounds causes the formation of fossil fuels from organic matter.
18. The tendency of fuels to auto ignite in an engine casues this phenomenon.

2. Casual name for 2,2,4-trimethylpentane.
3. Gaseous fossil fuel.
4. Metal used during catalytic reforming.
5. The _________ in fossil fuels store energy.
6. Combination of CO and hydrogen gas.
8. Converts solid coal into crude oil.
12. Our _________ measures the greenhouse gasses we produce individually with our daily choices and actions.
13. Formed when marine plants and animals decompose under high pressure.
14. Produces useful small hydrocarbons from longer chains.
15. All fossil fuel energy orginates here.
17. Type of biomass that releases the most carbon dioxide when burned.