fuels and crude oil

• what are some sources of non- renewable energy ?

  natural gas (methane), crude oil (petroleum) and coal
• what kind of compounds are natural gas, petroleum and coal and why ?

  they are organic compounds as they all contain carbon elements as the main component in their structures
• what is petroleum ?

  it is a mixture of hydrocarbons
• what are hydrocarbons ?

  compounds containing only the elements hydrogen and carbon
• how can petroleum be separated into its fractions ?

  by fractional distillation