| the study of matter and the changes that it undergos |
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| anything that has mass and takes up space |
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| a measurement that reflects the amount of matter the amount of matter that an object possesses |
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| a measure of the gravitational force exerted on an object |
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| a systematic approach used in scientific study |
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| information that describes color, odor, shape, or some other physical characteristic data that describes the physical properties |
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| data that can be measured; examples include SI units-measurement, accuracy, and percision. |
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| a tentative explanation for what has been observed, is followed by an experiment to find out why this happened |
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| a set of controlled observations that test the hypothesis |
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| the variable that you plan to change |
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| the variable whose amount changes in response to a change in the independent variable |
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| a standard for comparison it is usually set at 0 or is completely unchanged, something that would be found in nature |
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| a judgement based on the information obtained in the experiment, states whether hypothesis was correct or not |
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| a visual, verbal, and/or mathematical explanation of experimental data |
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| an explanation that has been supported by many, many experiments |
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| a relationship in nature that is supported by many experiments but there is no explanation for why it happens |
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| units that are used in every country except for U.S.A. |
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| a defined unit in a system of measurement that is based on an object or event in the physical world |
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| the SI unit for length, it is measured with a yard stick |
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| the SI unit for mass, it is measured with a scale or triple-beam |
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| a unit that is defined by a combination of base units ex: density=mass(g)/volume(l) |
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| the SI unit for volume, is measured with water displacement for irregular shapes and geometry for regular shapes |
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| the ration of mass to volume in an object; the SI unit is g/cm3 (grams over cubic centimer); the gram represents volume and the cubic cintimeter represents mass |
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| the SI unit for temperature; add 273 to convert Celcius to Kelvin and subtract 273 to convert K to C measured with a thermometer |
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| writing a number so that it has only a tens place digitwise and will be multiplied to 10 with a power ex1; 12300×10(-3)=12.3 *3 is not being multiplied, it is used as an exponent ex2; 9.2561327×10(4)=92561.327 |
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| a ratio of equivalent values used to express the same quantity in different units changing kg to ml but not kg to l ex; 203kg=203000g |
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| a method of problem solving that focuses on the units used to describe matter to convert celcius to kelvin you focus on the relationship between the units |
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| how close a series of measured values are to to an accepted value or the true value |
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| how close a series of measurements are to one another |
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| the ratio of an error to an accepted value the equation used to find this is percent error=(error/acceptedvalue) multiplied by 100 |
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| the amount you have measured plus an extra digit ex; if measured 2.3 and 2.4 and 2.2, you may actually have gotten 2.35 and 2.48 and 2.21 and the number of significant figures in the measures are all 3 the rules: (orange are significant) 1. non zero #s are always significant 72.3 2. zeros between numbers are always significant 60.5 3. all final zeros to the right of a decimal place are significant 6.20 4. zeros that act as a placeholder are not significant 0.0253 & 4320 |
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