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What does matter mean?
amount of mass and the volume
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What two things made up matter?
Pure substances and mixtures
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What does pure substances mean?
anything that contains ONE type of particle
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What two things made up pure substances?
Elements and compound
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What does elements mean?
- simplest form of a particle
- -cannot be 'changed' int anything simpler
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What does compound mean?
2 or more elements (ex. H20)
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What two things make up mixtures?
Homogeneous mixtures and heterogeneous mixtures
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What does mixtures mean?
Combination of 2 or more pure substances
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What is a Homogeneous mixture?
homo=same, substances the are evenly & microscopically mix together (ex. peanut butter)
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What is a Heterogeneous mixture?
hetero=different, a mixture that is NOT uniform (ex. choco chips, oil water)
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What are physical properties?
- observed with senses, measure, or calculate
- (color and hardness)
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What are the three states of matter?
solid, liquid, gas
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Solid
be picked up, carried around without being in a special container
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Liquid
flow to the lowest level, can be poured
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Gas
take both the volume and shape if any object
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What does it mean when metals are malleable?
beaten into thin sheets
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What does it mean when metals are ductile?
"drawn" into wires
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What is solubility?
degree to which a substance will dissolve in a given amount
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What is conductivity? What is it used for?
ability of a material to conduct electricity or heat, wiring electricity, protect against electrical flow
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Do all things conduct electricity? Name some examples.
Metal
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What is density and what is the 'formula' for finding density for any matter?
- Mass per unit volume of a substance, the 'heaviness'
- density -mass
- -volume
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What are chemical properties?
describes the behavior of a substance as it changes into a new substance.
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What does it mean when a matter is flammable?
it can burn, rapid reaction of some substances with oxygen
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Name 2 types of matter that are not flammable and give reasons why they are important.
water, carbon, cools and smothers fire
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What is corrosion? What element is required in order for a matter to erode?
slow reaction of certain metals with oxygen form metal oxides, metal and oxygen
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what is acid and why is reaction with acid a chemical change?
a highly reactive liquid, it produces carbon dixoide gas
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