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19 Cards in this Set
- Front
- Back
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Hypothesis
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A testable statement.
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Scientific method
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A logical approach to solving problems by observing and collecting data, formulating hypotheses, testing hypotheses, and formulating theories that are supported by data.
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Model
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An explanation of how phenomena occur and how data or events are related.
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Conversion factor
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A ratio derived from the equality between two different units that can be used to convert from one unit to the other.
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Derived unit
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A unit that is a combination of of SI based units.
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Density
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The ratio of mass to volume or mass divided by volume.
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Quantity
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Something that has magnitude, size, or amount.
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System
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A specific portion of matter in a given region of space that has been selected for study during an experiment of observation.
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Theory
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A broad generilization that explains a body of facts or phenomena.
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SI
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The measurement system accepted worldwide.
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Weight
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A measure of the gravitational pull on matter.
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Volume
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The amount of space occupied by an object.
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Accuracy
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The closeness of measurements to the correct or accepted value of the quantity measured.
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Indirectly proportional
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Numbers that when are divided by each other give constant value.
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Precision
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The closeness of a set of measurements of the same quantity made in the same way.
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Significant figures
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Digits whos measurements are known with certainty plus one final digit, which is somewhat uncertain or is estimated.
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Directly proportional
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Direct proportions are numbers that give constant values when divided by each other.
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Percent error
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A value calculated by subtracting the experimental value from the accepted value, dividing the difference by the accepted value, and then multiplying by 10.
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Scientific notation
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Numbers written in the form M x M^n where the factor M is a number greater then or equal to 1 but less then 10 and n is a whole number.
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