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67 Cards in this Set
- Front
- Back
Physical Properties
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properties that can be observed w/o altering the identity of a substance
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Chemical properties
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properties that can only be observed by changed the identity
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examples of physical properties
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meling point, density, color
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ex of chemical propertis
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reactivity, flammability
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physical change
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doesnt change the composision of the material
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chemical change
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chage that changes the composition of the material
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examples of ph ysical change
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crush, molding, tearing, boiling, melting
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ex of chemical change
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dying hair, burning, cooking, rusting
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law of conservation of matter
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matter is neither destroyed or created only transformed
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law of conservation of energy
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energy cannot be createdd or destroyed
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matter
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anything with masss and volume
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characteristic of a solid
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particles are closely together
definite volume particular shape |
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characteristics of a liquid
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particles flow freely
definitate volume does not hold its own shape |
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gas
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very spread apart particles
no def shape or volume |
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ex of solid
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wood, brick
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ex of liquid
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h20 milk
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ex of gas
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oxygen, nitrogen
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chemistry
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chemistry is the study of all substances and how they change
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energy
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the capacity to do work or produce heat
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forms of energy
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radiant
kinetic potential |
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kinetic enery
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energy in motion
train |
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potential energy
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stored energy
roller coaster, food |
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mixture
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combination of pure substances; can be seperated into those substances by physical change
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heterogeneous mixture
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you can see the different parts
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homogeneous mixtures
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cannot see the parts
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how do we seperate mixtures
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distillation
filtration solid from liquid crystallization form pure solid chromotography |
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element
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substancde that cant be broken down into similar substances even by chemical means
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compound
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two or more elements combined ina chemical rx.
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scientific method
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set of steps to solve any problem or answer a question
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steps of the method
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observation
question hypothesis expiriment |
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variable
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the thing that your testing
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experimental control
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basis for comparisod
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natural law
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tells what happens, but now why
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theory
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predict what will happen
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Mega
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10^6
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Kilo
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10^3
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Centi
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10^-2
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milli
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10^-3
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micro
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10^-6
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nano
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10^9
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pico
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10^-12
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Metric prefixes
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M K D C M M N P
Milo the King drank choclate milk from M N P |
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major units of science
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metric, SI
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mass
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kg
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length
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s
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length
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meters
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time
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seconds
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temperature
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kelvin
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volume
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cubic meter
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pressure
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pascal
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energy
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joule
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mass
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the amount of material in an object
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Volume
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how much space an object takes up
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diff btw mass and weight
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mass deals with gravity
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Desnity
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mass/volume
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percent erro
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absolute value of experimental- theorteical divided by the theoreticaland multiplied by 100
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Freezing point for Celsius
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O
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Freezing point for kelvin
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273
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converting from celcius to kelvin
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subtract 273
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converting from kelvin to celsius
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add 273
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1 in =
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1.54
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1 gal
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3.785 L
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1 cal
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4.184 j
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1 atm=
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101,325 pa
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1 ft
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12 in
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1 mi
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5280 ft
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1 atm
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760 mm Hg
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