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Rocks and their Properties
7th Grade Science
15
Science
7th Grade
04/07/2014

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Term
atom
Definition
smallest part of an element that can be identified as that element
Term
element
Definition
simple substances that cannot be broken down into simpler substances by ordinary chemical means
Term
compound
Definition
substance made up of two or more elements that are chemically combined
Term
molecule
Definition
smallest part of a substance that has all the properties of that substance
Term
chemical symbol
Definition
number in a chemical formula that shows how many of each atom are in one molecule of a compound
Term
chemical formula
Definition
shorthand way of writing the name of an element
Term
physical property
Definition
observable characteristic that describes an object
Term
streak
Definition
color of the powder left by a mineral
Term
luster
Definition
how a mineral's surface reflects light
Term
hardiness
Definition
property of a mineral that relates to how much the mineral resists being scratched
Term
density
Definition
amount of matter in a given volume
Term
magnetism
Definition
force of attraction or repulsion associated with magnets
Term
fracture
Definition
tendency of some minerals to break into pieces with uneven surfaces
Term
evaporation
Definition
process by which a liquid changes into a gas
Term
precipitation
Definition
examples include rain, sleet, snow, and hail
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