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67 Cards in this Set

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Physical Properties
properties that can be observed w/o altering the identity of a substance
Chemical properties
properties that can only be observed by changed the identity
examples of physical properties
meling point, density, color
ex of chemical propertis
reactivity, flammability
physical change
doesnt change the composision of the material
chemical change
chage that changes the composition of the material
examples of ph ysical change
crush, molding, tearing, boiling, melting
ex of chemical change
dying hair, burning, cooking, rusting
law of conservation of matter
matter is neither destroyed or created only transformed
law of conservation of energy
energy cannot be createdd or destroyed
matter
anything with masss and volume
characteristic of a solid
particles are closely together
definite volume
particular shape
characteristics of a liquid
particles flow freely
definitate volume
does not hold its own shape
gas
very spread apart particles
no def shape or volume
ex of solid
wood, brick
ex of liquid
h20 milk
ex of gas
oxygen, nitrogen
chemistry
chemistry is the study of all substances and how they change
energy
the capacity to do work or produce heat
forms of energy
radiant
kinetic
potential
kinetic enery
energy in motion
train
potential energy
stored energy
roller coaster, food
mixture
combination of pure substances; can be seperated into those substances by physical change
heterogeneous mixture
you can see the different parts
homogeneous mixtures
cannot see the parts
how do we seperate mixtures
distillation
filtration solid from liquid
crystallization form pure solid
chromotography
element
substancde that cant be broken down into similar substances even by chemical means
compound
two or more elements combined ina chemical rx.
scientific method
set of steps to solve any problem or answer a question
steps of the method
observation
question
hypothesis
expiriment
variable
the thing that your testing
experimental control
basis for comparisod
natural law
tells what happens, but now why
theory
predict what will happen
Mega
10^6
Kilo
10^3
Centi
10^-2
milli
10^-3
micro
10^-6
nano
10^9
pico
10^-12
Metric prefixes
M K D C M M N P

Milo the King drank choclate milk from M N P
major units of science
metric, SI
mass
kg
length
s
length
meters
time
seconds
temperature
kelvin
volume
cubic meter
pressure
pascal
energy
joule
mass
the amount of material in an object
Volume
how much space an object takes up
diff btw mass and weight
mass deals with gravity
Desnity
mass/volume
percent erro
absolute value of experimental- theorteical divided by the theoreticaland multiplied by 100
Freezing point for Celsius
O
Freezing point for kelvin
273
converting from celcius to kelvin
subtract 273
converting from kelvin to celsius
add 273
1 in =
1.54
1 gal
3.785 L
1 cal
4.184 j
1 atm=
101,325 pa
1 ft
12 in
1 mi
5280 ft
1 atm
760 mm Hg