refers to how close a series of measurements are to one another; precise measurements show little variation over a series of trials but might not be accurate
precision
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boom
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seesaw
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rocket
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baam
Lose 20 points!
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10
refers to how close a measured value is to an accepted value
accuracy
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15
law of definite proportions
states that, regardless of the amount, a compound is always composed of the same elements in the same proportion by mass
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5
technology
the practical use of scientific information
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10
conclusion
a judgment based on the information obtained
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15
a technique that is used to separate the components of a mixture based on the tendency of each component to travel or be drawn across the surface of a fixed substrate
chromatography
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5
a transition of matter from one state to another
phase change
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10
an explanation supported by many experiments; is still subject to new experimental data, can be modified, and is considered valid it if can be used to make predictions that are proven true
theory
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eraser
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gift
Win 25 points!
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gift
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banana
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15
law of conservation of mass
states that mass is neither created nor destroyed during a chemical reaction but is conserved
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trap
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gift
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rocket
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lifesaver
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10
Which of the following is a compound?
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10
one that has a uniform composition throughout and always has a single phase; also called a solution
homogeneous mixture
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5
Copper
Element
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5
experiment
a set of controlled observations that test the hypothesis