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Earth Resources- C25-1

Giovanni J

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Across
1.Occurs when air contains harmful levels of pollutants; can be caused by natural phenomena, such as forest fires or volcanic eruptions, or by human activities, such as burning of fossil fuels
5.Resources provided by Earth, including air, water, land, all living organisms, nutrients, rocks, and minerals
6.Material left after ore is extracted that may release harmful chemicals into surface water or groundwater
10.Natural resource, such as fresh air and most groundwater, than can be used indefinitely without causing a reduction in the available supply
11.Substance that disrupts Earth's geochemical cycles and can harm the health of living things or adversely affect their activities
Down
1.Naturally accumulating mixture of sand, gravel, and crushed stone found in flood plains, alluvial fans, or glacial deposits
2.Resources that exists in Earth's crust in a fixed amount and can be
3.Process that removes salt from ocean water in order to provide freshwater
4.Replacement of renewable resources at the same rate at which they are consumed
7.Process by which productive land becomes desert; in arid areas can occur through the loss of topsoil
8.Unweathered, solid parent rock that may consist of limestone, marble, granite, or other quarried rock
9.Mineral that contains a valuable substance that can be mined at a profit; natural resources that may be associated with igneous rocks or formed by processes at Earth's surface

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