Petroleum

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The breaking down of long chain hydrocarbons into smaller, more useful molecules
The process where a mixture of different liquids is separated into different fractions by means of their different boiling points
Where certain compounds of the same molecular formula exist in different forms
Energy cannot be created nor destroyed, but may be converted from one form to another
A measure of the tendancy of a fuel to cause knocking, or auto-ignite
A fuel with a very high octane number due to the presence of oxygen in it
The reaction of steam with natural gas at a high temperature to produce hydrogen gas
Premature ignition of the petrol/air mixture in the combustion engine before a spark is produced