 Any natural substance, organisms, or energy form that living things use  Examples: Tree, Water, Wind, Natural Gas, Solar Energy.

 A resource that can be replaced in a lifetime.  Example: Trees, Water, Sunlight, Wind.

 Resources that will not replace themselves in a lifetime.  Coal,oil,

 Recycling is when you use discarded or used materials are treated and then used again.  Plastic, glass, paper, and aluminum.

 Natural resources that humans use to produce energy.  Different types like nonrenewable and renewable resources.  Ex. Natural gas, solar energy, and Hydro energy.

 Fuels that are made from the remains of animals millions of years ago.  Coal, and natural gas.

 An oily mixture of flammable organic compounds from which liquid fossil fuels.

 Gaseous fossil fuels.  Most natural gas is used for heating and for generating electricity.

 A solid fossil fuel formed underground from buried, decomposed plan material.

 A process in which rock and soil are stripped from the Earth’s surface to expose materials to be mined.

 Rain or snow that has high acid content

 A photochemical fog produced by the reaction of sunlight and air pollutants

 An alternative source of energy that comes from nuclei of atoms.

 Energy from the sun.

 Energy in wind.

 Produced by falling or running water

 Organic Matter that contains energy

 Energy from within the Earth