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Glencoe Earth Science Ch 25 Vocabulary
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natural resources,  | the resources the earth provides such as air, water, land, all living things, nutrients, rocks, minerals |
nonrenewable resource,  | natural resources that exist in a fixed amount in Earth's crust and can be replaced only by geological, chemical, and physical processes that take hundreds of millions of years |
renewable resource,  | natural resources that it is possible to use indefinitely without causing a reduction in the available supply |
| sustainable yield | the replacement of renewable resources at the same rate at which they are consumed |
aggregate,  | a mixture of gravel, sand, and crushed stone that naturally accumulates on or close to Earth's surface |
bedrock,  | base of unweathered parent rock that may consist of limestone, granite, or marble that can be mined in quarries |
desertification,  | the process by which productive land becomes desert |
| gangue | material left after ore is extracted that is often harmful |
ore,  | a natural resources that can be mined at a profit |
air pollution,  | when pollutants in air occur in quantities that become harmful to human health and the health of the environment |
pollutant,  | substances that can adversely affect the survival, health, or activities of organisms |
desalination,  | the process in which salt is removed from ocean water to create fresh water |
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EC Glass High School |
| Lynchburg, VA |
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