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Unit 6

Earths Structures

TermDefinition
mineral A natural, usually inorganic solid that has a characteristic chemical composition and an orderly internal structure.
element A substance that cannot be separated or broken down into simpler substances by chemical means ; all atoms of an element have the same atomic number.
atom the smallest unit of an element that maintains the properties of that element.
compound A substance made up of two atoms or irons of two or more different elements joined by chemical bonds.
matter Anything that has mass and takes up space.
crystal Natural solid substance that has a definite geometric shape.
streak The color of a mineral in powdered form.
luster The way in which a mineral reflects light.
cleavage In geology, the tendency of a mineral to split along specific planes of weakness to form smooth, flat surfaces.
weathering The natural process by which atmospheric and environmental agents, such as wind, rain, and temperature changes, disintegrate and decompose rocks.
erosion The process by which wind, water, ice, or gravity transports soil and sediment from one location to another.
deposition The process in which material is laid down.
igneous rock Rock that forms when magma cools and solidifies.
sedimentary rock A rock that forms from compressed or cemented layers of sediment.
metamorphic rock A rock that forms from other rocks as a result of intense heat, pressure, or chemical processes.
rock cycle The series of processes in which rock forms, changes from one type to another, is destroyed, and forms again by geologic processes.
uplift The rising
subsidence
rift zone
crust
mantle
convection
core
lithosphere
asthenosphere
mesosphere
Created by: user-2016591
 

 



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