In tar sand,microbes have biodegraded larger molecules,leaving smaller molecules.
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Q10: Coal is the altered remains of ancient
Q11: Hydrocarbons consisting of short carbon chains are
Q28: _ create(s)an easy route for oil or
Q29: Tar has a lower viscosity than gasoline.
Q29: _ is/are an example of alternative hydrocarbon
Q31: The figure below shows close-up views of
Q32: Natural gas _.
A) consists of longer carbon
Q35: Most coal forms in _,which develop and
Q38: Graphite forms from natural gas as well
Q40: Which organic substance is produced by black
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