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### 13 Cards in this Set

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 density the mass per unit volumeof a material. descrives how tightly packed a substance's molecules are. derived unit unit of measurement obtained by combining SI units. for example density= mass % volume graph a visual display of information or data- such as line graphs, bar graphs, and circle graphs- organized to help people interpret, understand, or quickly find information. kelvin the SI unit of temperature: zero K= absolute zero (the coldest possible tempurature, -273 kilogram the SI unit of mass: 1 kilogram (kg) = 1000 grams. liter the unit of liquid volume (L) that occupies the same volume as a cubic decimeter (dm3) and is slightly larger than a quart. mass a measurement of the amount of matter in an object: its SI unit is the kilogram (kg) meter the SI base unit of length (m): 100 cm = 1m. second the SI unit for time SI international system of units: standard, easy to us, worldwide system of measurement based on powers of 10. the SI standards are used by all scientists, and are a modern version of the metric system. standard in measurement, an exact quantity that everyone agrees to use as a basis of comparison time the interval between two events: the SI unit for time is the second. volume the amount of space occuupied by an object; volume units are found by combining other SI units of length.