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9Sci CH2
9th Science CH2 Physical Science Methods
| Term | Definition |
|---|---|
| density | the mass per unit volume of a material describes how tightly packed a substance’s molecules are |
| derived unit | unit of measurement obtained by combining SI units; for example, density is a derived unit formed by dividing an object’s mass by its 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 temperature, -273C) |
| kilogram | the SI unit of mass; 1 kilogram (kg)=1000 grams (g) |
| liter | the amount of liquid volume (L) that c=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 a 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-use, 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; for example, a centimeter, meter, kilogram, cubic diameter, milliliter, liter, kelvin, joule, and so on |
| time | the interval between two events; the SI unit for time is the second |
| volume | the amount of space occupied by an object; volume units are found by combining other SI units of length |
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djhockett5
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