Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Crude oil refers to a fossil fuel that is formed from the remains of ancient marine organisms. It is a thick, dark liquid composed mainly of hydrocarbons.
Energy derived from sources that cannot be replenished in a short period, like crude oil.
Tar sands: Also known as oil sands, tar sands are deposits of sand or clay mixed with water and bitumen (a thick form of petroleum). They require extensive processing to extract usable oil.
Fossil fuels: A general term for non-renewable energy sources such as coal, natural gas, and crude oil.