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39 Cards in this Set
- Front
- Back
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a tentative explanation for an observation, phenomenon, or scientific problem that can be tested by further investigation
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hypothesis
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a broad generalization that explains a phenomenon
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theory
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numerical info (measurements)
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quantitative
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non-numerical info (descriptions)
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qualitative
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If- then, If I drop something, then it will fall is an example of a...
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hypothesis
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the variable you control, - you change this
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independent variable
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the variable you measure, - your results
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dependent variable
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the _________ variable should be placed on the X-axis
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independent
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the _________ variable should be placed on the Y-axis
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dependent
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SI Base Unit for length
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meter
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SI Base Unit for mass
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kilogram
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SI Base Unit for time
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second
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SI Base Unit for Temperature
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kelvin
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SI Base Unit for Concentration(amount on substance)
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Mole/Molarity
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Unit for Area
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m(2)
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Unit for Volume
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m(3)
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Unit for density
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kg/m(3)
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Unit for Molar Mass
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kg/mole
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a ratio that shows the equivalence relationship between the two units
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Conversion Factor
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all digits in a measurement that are known with certainty plus a final estimated digit
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Significant Figures
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study of composition, structure, and properties of matter, plus the changes it undergoes
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Chemistry
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anything that has mass and takes up space
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Matter
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the amount of matter *not the same as weight, *weight depends on gravity, and ______ does not
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mass
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smallest unit of an element that maintains the properties of that element
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atom
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a pure substance made of one kind of atom
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element
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substance made from atoms of two or more elements that are chemically bonded
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compound
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depends on the amount of matter present
volume mass amount of energy |
extensive properties
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does not depend on the amount of matter present
melting/boiling points density color conductivity |
intensive properties
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can be observed without changing the identity of the substance
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physical properties
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describes how the substance reacts with other substances to form new substances
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chemical properties
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a change that does not alter the identity of the substance
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Physical Change
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three most common states of matter
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solid, liquid, gas
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definite volume and definite shape
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solid
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definite volume and indefinite shape
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liquid
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indefinite volume and indefinite shape
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gass
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one or more substances are converted into different substances
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Chemical Change
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organiazes the elements bases on their chemical properties
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The periodic table
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the vertical columns in the periodic table are the......
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groups or families
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the horizontal columns in the periodic table are the......
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periods
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