| A | B |
|---|
| Natural resources can be divided into two groups | energy resources and material resources |
| energy resources are | natural resources that provide people with energy; example sunlight, wind, water, wood |
| material resources are | resources with use to make products; sand is made into glass, wheat is made into flour |
| natural resource | any useful material found in the environment |
| renewable resource | a natural resource that the environment (nature) continues to supply or replace as it is used (water, wind |
| nonrenewable resource | a resource that cannot be replaced once it is used |
| fossil fuel | any one of several nonrenewable resources such as coal, oil, or natural gas created from the remains of plants and animals |
| recycle | to reuse materials to make new products |
| combustion | the burning of a fuel |
| petroleum | liquid fossil fuel: oil |
| refinery | a factory where crude oil is separated into fuel and other products |
| hydroelectric power | electricity produced by the kinetic energy of water moving over a waterfall or dam |
| biomass fuels | fuels made from things that once were alive |
| energy conservation | the practice of reducing energy use |
