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72 Cards in this Set
- Front
- Back
The Scientific Method-
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systematic approach to research (ovservation-representation-interpretation)
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Hypothesis-
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a tentative explanation for a set of observations
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Law-
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a consice statement of a realtionship between phenomena that is always the same under all conditions
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Chemistry-
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the study of matter and the changes it undergoes
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Matter-
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anything that occupies space and has mass
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Substance-
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form of matter that has definite composition and distince properties
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Mixture-
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combination of 2 or more substances in which the substances reatain their distinct identities
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Homogenous Mixture-
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Composition of the mixture is same throughout
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Heterogenous Mixture-
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Composition is not uniform throughout
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Physical Means-
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can be used to separate a mixture into its components (distillation)
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Element-
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a substance that cannot be separated into simpler substances by shemical means
-113 |
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Compound-
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a substance composed of atoms of 2 or more differentslements chemically united in fixed proportions
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Physical Change-
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does not alter the comp. of a substance
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Chemical Change-
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alters the composition or identity of a substance (hydrogen burns in air to form water)
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Extensive Property-
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Material depends on how much matter is being considered
-mass, length, volume |
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Intensive Propery-
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Material does not depend on how much matter is being considered
-color, density, temp. |
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Matter-
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anything that occupies space and has mass
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Mass-
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measure of the quantity of mass
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What is the SI unit of mass?
(formula) |
Kilogram
1 Kg = 1000g =1 x 10^3g |
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Weight-
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force that gravity exerts on an object (depends on gravity)
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Name of unit and Symbol for each:
Length- |
meter
m |
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Mass
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kilogram
kg |
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Time
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second
s |
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Electrical Current
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ampere
A |
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Temperature
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kelvin
K |
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amount of substance
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mole
mol |
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Luminous intensity
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candela
cd |
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Symbol and meaning for the following (prifixes used with SI units)
Tera- |
T
1000000000000 or 10^12 |
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Giga-
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G
1000000000 or 10^9 |
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Mega-
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M
1000000 or 10 ^6 |
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Kilo-
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k
1000 or 10^3 |
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Deci-
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d
1/10 or 10 ^-1 |
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Centi
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c
1/100 or 10^-2 |
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Milli
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m
1/1000 or 10^-3 |
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Micro
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(u)
1/1000000 or 10^-6 |
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Nano
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n
1/1000000000 or 10 ^-9 |
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Pico
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p
1/1000000000000 or 10^-12 |
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Volume-
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SI derived unit for volume is cubic meter (m^3)
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Density-
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mass
_____ volume |
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Give symbol for each element:
Aluminum |
Al
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Arsenic
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As
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Barium
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Ba
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Bismuth
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Bi
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Bromine
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Br
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Calcium
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Ca
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Carbon
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C
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Chlorine
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Cl
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Chromuim
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Cr
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Cobalt
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Co
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Copper
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Cu
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Fluorine
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F
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Gold
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Au
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Hydrogen
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H
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Iodine
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I
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Iron
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Fe
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Lead
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Pb
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Magnesium
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Mg
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Manganese
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Mn
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Mercury
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Hg
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Nickel
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Ni
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Nitrogen
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N
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Oxygen
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O
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Phosphorus
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P
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Platinum
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Pt
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Potassium
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K
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Silicon
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Si
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Silver
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Ag
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Sodium
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Na
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Sulfur
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S
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Tin
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Sn
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Tungsten
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W
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Zinc
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Zn
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