Petroleum Crossword

4. Existing in natural state.
6. Chemicals that come from petroleum.
11. A form of energy resulting from the existence of charged particles.
14. A product that comes directly from petroleum and is used in furniture, polish, and milk cartons.
15. Substance used in cars, cooking, fuel.
17. The entire molecule chain.
18. A long pipe, typically underground, for conveying oil, gas, etc. over long distances.
20. Fossil fuel commonly used in cars.
21. Substance that cannot be replaced when used up.
22. The remains or impression of a prehistoric organism preserved in petrified form.
23. The main material used for building roads.
24. Very valuable, heavy material.
25. A system of making and trading things of value.

1. Substance believed to be formed millions of years ago when layers of dead plants and animals were buried beneath sediments.
2. An industrial installation where a substance is refined.
3. A synthetic material made from a wide range of organic polymers
5. Darkest color.
7. Power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines.
8. Different parts of petroleum.
9. A substance that flows freely but is of constant volume.
10. A molecule that can be bonded to other identical molecules to form a polymer.
12. Substances that reduce friction.
13. The process or industry of obtaining coal or other minerals from a mine.
16. Process of separating petroleum into its fractions.
19. Worth a great deal of money.