Fossil fuels form natural­ly from decaying plants and animals living in ancient seas millions of years ago. this is harvested as crude oil and it contains many hydrocarbons, or molecules that contain hydrogen and carbon in various lengths and structures. the refining process uses separation and a technique called conversion, to turn longer chain molecules such as in diesel fuel are broken into shorter ones forming gasoline.

What are the two largest greenhouse gases

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Match the vocabulary terms to their definitions. 1 . a long, chain-like set of molecules made up of repeating units joined end to end polymer 2 . a hard, brittle, heat- and corrosion-resistant material made by subjecting a nonmetallic mineral mixture to intense heat ceramic 3 . a plastic with low elongations that cannot be recycled thermoset 4 . a carbon fiber embedded in a polymer resin matrix thermoplastic 5 . a plastic with high elongations that can be recycled crystal 6 . a solid form resulting from the arrangement of atoms, ions, or molecules in definite geometric patterns composite