Unit One Chemistry Test
Terms
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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
- joule
- 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
- the amount of material in an object
- length
- meters
- time
- seconds
- temperature
- kelvin
- volume
- cubic meter
- pressure
- pascal
- 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