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32 Cards in this Set
- Front
- Back
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mineral
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a solid material of Earth's crust with a definite composition
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luster
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the way light bounces off a mineral's surface
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streak
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the color of the powder left when a mineral is rubbed against a hard, rough suface
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hardness
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how well a mineral resists scrating
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cleavage
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the tendency of a mineral to break along flat surfaces
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ore
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a mineral containing a useful substance.
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gem
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a mineral valued for being rare and beautiful
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nonrenewable resourse
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a resourse that can't be replaced over a short period of time or at all
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igneous rock
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a rock that forms when hot liquid rock material hardens into a solid
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sedimentary rock
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rock that forms from other piece of rock squeezed toghether
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metamorphic rock
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a rock that forms from another type of rock that is changed by heat, pressure, or a chemical reaction
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humus
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decayed plant or animal material in soil
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pollution
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adding any harmful things to Earth's land water or air
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rock cycle
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rocks changing from one type of rock to another in a process that never ends
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lode
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a veinlike mineral deposit ( often gold) in solid rock
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prospector
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a person who searches for gold or other valuable minerals
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placer deposits
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particles of gold found in loose gravel
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renewable resourse
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a resourse that can be replaced in a short period of time
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ozone layer
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a layer of ozone gas in the atmosphere that screens out much of the sun the sun's UV rays
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fossil fuel
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a fuel formed from the decay of ancient forms of life
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smog
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a mixture of smoke an fog
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acid rain
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moisture that goes to earths surface after being mixed with wastes from fossil fuels
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desalination
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getting fresh water from sea water
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water cycle
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the on going movement btw earths surface and the air changing from liquid to gas to liquid
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groundwater
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water that goes into the the ground into places btw rocks and soil
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water table
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the top of the water filled spaces in the ground
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aquifier
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an underground layer of rock and soil filled w/ water
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spring
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a place where ground water come out of the ground
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well
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a hole dug below the water table that water goes into
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reservoir
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a place where fresh water is kept
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nuclear fission
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the SPLITTING of nucleus with a large mass into two nuclei with smaller masses
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nuclear fusion
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the merging of nuclei with smaller masses into a nuclus with a larger mass
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