| A | B |
|---|
| natural resource | a material in the natural environment that people value and use to satisfy their needs |
| renewable resource | a natural resource that the environment continues to supply or replace as it is used |
| nonrenewable resource | a natural resource that cannot be replaced once it is used |
| fossil fuel | any one of several nonrenewable mineral resources formed from the remains of ancient plants and animals and used for fuel |
| nuclear energy | a type of energy produced by fission- splitting of uranium atoms in a nuclear reactor, releasing stored energy |
| water power | energy produced from falling water to move machinery or generate electricity |
| geothermal energy | energy produced from the earth's intense interior heat |
| solar energy | energy produced by the sun |
| primary economic activity | an economic activity that takes or uses natural resources directly, such as fishing or mining |
| subsistence farming | farming that provides only enough for the needs of a family or a village |
| commercial farming | the raising of crops and livestock for sale in markets |
| secondary economic activity | an economic activity in which people use raw materials to produce or manufacture new products of greater value |
| cottage industry | a small-scale manufacturing operation using little technology, often located in or near people's homes |
| commercial industry | a large-scale manufacturing operation that employs many people and produces large quantities of goods |
| tertiary economic activity | an economic activity in which people do not directly gather or process raw materials but pursue activities that serve others; service industry |
| quaternary economic activity | an economic activity that focuses on the acquisition, processing, and sharing of information, such as education or research |
| export | an item that is sent out of the country for sale |
| import | an item that is brought into the country for sale |
