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25 Cards in this Set

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  • Back
Matter
anything that has mass and occupies space
Mass
measure of quantity of matter
Element
substance that cannot be broken down
Compound
substance made up of 2 or more elements chemically combined; can be broken down by chemical change
Mixture
consists of 3 or more substances; substances retain individual properties
Homogenous Mixture
sample from 1 part of mixture is same as sample from another part
Heterogeneous Mixture
sample from 1 part of mixture is different than another
Extensive Properties
depend on amount of sample
Intensive Properties
doesn't depend on amount of sample
Physical Properties
characteristics that can be observed with production of new substances
Chemical Properties
characteristics that describe how the substance interacts with other substances to produce new substances
Ex. of Chemical Change (3)
rusting nail, souring milk, burning paper
Ex. of Physical Change (3)
grinding to powder, color change, physical change
two states elements can be found
free & combined
three characteristics of a compound
def. proportion of elements; compound's properties differ from the elements that make it up; can be changed to form simpler substance by chemical means
3 ways to form mixture
Elem. & Elem.; Elem. & Comp.; Comp. & Comp.
characteristics of mixture
retains properties of elements and compunds that make it up; composition can very; homogeneous/heterogeneous
diff. btwn mass & weight
weight changes with location, mass doesn't
Ex. of Extensive Properties (3)
mass, volume, weight
Ex. of Intensive Properties (2)
melting point, boiling point
Law of Conservation of Matter
matter cannot be created nor destroyed by a chemical reaction
amount of crust made of oxygen
50%
amount of water contains oxygen (with hydrogen)
90%
amount of air made up of "free element" oxygen
23%
amount of crust taken up by silicon
1/4