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Earth Resources-C25-2

Jashon Washington

Earth Resources-C25-2

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Across
6.natural resource, such as fresh air and most groundwater, than can be used indefinitely without causing a reduction in the available supply (2 Words)
7.natural resource that may be associated with igneous rocks or formed by processes at Earth's surface
9.occurs when air contains harmful levels of pollutants; can be caused by natural phenomena, such as forest fires or volcanic eruptions (2 Words)
10.process that removes salt from ocean water in oder to provide freshwater
11.resources provided by Earth, including air, water, land, and all living organisms, nutrients, rocks, and minerals (2 Words)
Down
1.resource that exists in Earth's curst in a fixed amount and can be replaced on by geological, physical, or chemical processes that take hundreds of millions of years (2 Words)
2.process by which productive land becomes desert; in arid areas can occur through the loss of topsoil
3.naturally accumulation mixture of sand, gravel, and crushed stone found in floodplains, alluvial fans, or glacial deposits
4.marterial left after ore is extracted that may release harmful chemicals into surface water of groundwater
5.substance that disrupts Earth's geochemical cycles and can harm the health of living things adversely affect their activities
8.unweathered, solid parent rock that may consist of limestone,marble, granite, or other quarried rock

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