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science

rocks and minerals

?A
cleavage the tendancy of a mineral to split along smooth, definite surfaces
hardness the ability of a mineral to resist being scratched
ores used to describe minerals or combinations of minerals from which metals and non-metals can be removed in usable amounts
fracture the tendency of a mineral to split along rough or jagged surfaces
sedimentary formed from particles that have been carried along and deposited by wind and water
sediments the particles that form sedimentary rocks
inorganic not formed from living things or the remains of living things
crystal how flat sides that meet in sharp edges and corners
mineral naturally occuring, inorganic solid that has a definite chemical composition and crystal structure, it can have certain physical properties that can be used to identify them
luster describes the way a mineral reflects light from its surface
gemstones the minerals that are hard, beautiful, and durable substances that can be cut, polished for jewelry and decoration
rocks the building blocks of earth, placed into 3 groups according to how they form:igneous, sedimentary, and metamorphic
streak the color of powder scraped off a mineral when it is rubbed against a hard, rough surface
density the amount of matter in a given space
metamorphic are formed when chemical reactions, tremendous heat, and/or great pressure change existing rocks into new kinds of rocks
rock cycle the continuous changing of rocks from one kind to another over long periods of time
igneous the originally hot, fluid magma within the earth, classified accordsing to their compo. and texture
metals elements that have shiny surfaces and are able to conduct electricity and heat
intrusive rocks igneous rocks formed deep within earth
extrusive rocks rocks formed from lava
nonmetals elements that have dull surfaces and are poor conductors of electricity and heat
mineral naturally occuring, inorganic solid that has a definite chemical composition and crystal structure, it can have certain physical properties that can be used to identify them
luster describes the way a mineral reflects light from its surface
streak the color of powder scraped off a mineral when it is rubbed against a hard, rough surface
Created by: mslay on 2007-04-23



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