Energy Past & Present

Match it! Select the correct answer from the pull down...Good luck!

An organic chemical compound made up of hydrogen and carbon in either gaseous, liquid, or solid phase.

Describes a substance that liquids and gases cannot pass through.

A mixture of gaseous hydrocarbons, primarily methane, occurring naturally in the earth, used principally as a fuel in the production of heat, electricity, or in transportation.

Anything necessary to produce something is called a.

A solid combustible substance formed by the partial decomposition of vegetable matter without access to air.

A Fuel that is created naturally, or by human intervention at a relatively rapid rate, and therefore does not run out.

The United States has less than 5% of the worlds population, yet we consume about _____ of the worlds energy.

A chemical substance used to produce heat or power when burned.