Shared Flashcard Set

Details

Grade 8 science unit 3 vocabulary
assessment rocks, minerals and soil
24
Science
8th Grade
11/05/2013

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Cards

Term
igneous rock
Definition
rock that forms from the cooling of magma below the surface or laba at the surface is called
Term
luster
Definition
the term used to describe how a mineral reflects light from its surface
Term
chemical weathering
Definition
processes by which the matericals in a rock are changed into new materials
Term
enviroment
Definition
physical, chemical, and biotoic factors acting in a community
Term
mechanical weathering
Definition
process by which rock is broken into smaller pieces
Term
oxidation
Definition
cause of chemical weathering; combines the element oxygen with other elements or molecules
Term
weathering
Definition
mechanical and chemical processes that change objects on earths surface over time
Term
decompostition
Definition
process that changes once living material into organic matter
Term
sediment
Definition
rock material that has been broken down or dissolved in water
Term
soil
Definition
mixture of weathered rock, rock fragments, decayed organic matter, water, and air
Term
rock
Definition
natural, solid mixture of minerals or particles
Term
gemstone
Definition
rare and attractive mineral that can be worn as jewelry
Term
extrusive rock
Definition
igneous rock that cools and crystallizes on earths surface
Term
lava
Definition
molten rock that erupts on earths surface
Term
magma
Definition
molten or liquid rock underground
Term
density
Definition
mass divided by volume
Term
biota
Definition
all of the living organisms in an area
Term
parent material
Definition
the starting material of soil
Term
cementation
Definition
when mineral dissolved in water crystallize
Term
rock cycle
Definition
the series processes that change one type of rock into another type of rock
Term
compaction
Definition
when the weight of layers forces out fluids and decrease the space between grains
Term
organic matter
Definition
remains of something that was once alive
Term
inorganic matter
Definition
materials that have never been alive
Term
horizons
Definition
are layers of soil formed from the movement of the products of weathering
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