| 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-the 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 | A large-scale manufacturing operation that employs many people and produces large quantities of goods. |
| 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 | The raising of crops and livestock for sale in markets. |
| 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. |
