rocks and minerals
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| 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 |
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Created by:
mslay
on 2007-04-23