chapter5
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Created by:
jamiemanley on December 13, 2010
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18 terms
Terms | Definitions |
|---|---|
mineral | a naturally occurring substance neither plant nor animal |
igneous rock | "fire-made" rock formed from melted rock |
sedimentary rock | a rock that forms when sand, mud, and pebbles at the bottom of rivers, lakes, and oceans pile up |
metamorphic rock | " a change in form" -a rock that has changed form through squeezing and heating |
soil | mixture of tiny rock particles, sand, minerals ans silt |
humus | left over decomposed plant and animal material |
fossil | the imprint or remains of something that lived long ago |
amber | hardened tree sap; often a source of insect fossil |
fuel | a substance burned for its energy |
water cycle | the movement of Earth's water over and over from a liquad to a gas and from a gas to a liquad |
evaporate | to change from a liquad to a gas, what happens to water when it moves from the water into the air |
condense | to change from a gas to a liquad, when water vapor cools and turns into water droplets |
ground water | water stored in the cracks of underground rocks and soil |
conserve | to use something wisely without wasting it |
natural resource | a material on earth that is necessary or useful to people; ex: soil, water, oil, air |
renewable resource | a resource that can be replaced or used over and over againex:plants,animals, water, soil |
nonrenewable resource | a resource that cannot be used over and over; ex: gems and metals |
pollution | the adding of harmful substances to land or water |
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