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Phys Chap 3
| Question | Answer |
|---|---|
| Measurement | a comparison of a dimension of an object or substance to an appropriate standard, usually a calibrated scale |
| Dimension | a property that can be measured like length, mass |
| Standard | a known quantity |
| Instrument | Like thermometer, scale, meter stick used to make measurements |
| Unit | the segment of a dimension assigned the value of 1 |
| Calibrated scale | the size of the unit determines the spacing of the marks on the instrument |
| Data | information collected from a scientific observation |
| Qualitative data | word descriptions, like color, texture |
| Quantitative data | a measured numerical amount that has a number AND unit |
| SI | System International d'unit -- metric units |
| SI unit of length | meter |
| SI unit of mass | kilogram |
| SI unit of time | seconds |
| SI unit of volume | Liter |
| SI unit of temperature | Kelvins |
| Symbol of meter | m |
| Symbol of seconds | s or sec |
| Symbol of Liter | L |
| Symbol of Kelvins | K |
| Symbol of Kilogram | Kg |
| Bridge notation or conversion factors | used to convert units |
| Accuracy | evaluates how close the measurement is to the actual value |
| Precision | How exactly the measurement if made. The more decimal places the more exact. |
| Mass is measured on | electronic scales or triple beam scales |
| Volume is measured with | graduated cylinders |
| Length is measured with | rulers or meter sticks |
| If a quantity is defined or counted it has | infinite precision and sigfigs are not applicable |
| If a number has no unit what are not applicable? | sigfigs |
| significant figures | all the measured amounts plus one estimated place on an instrument |
| Kilo means | 1000 |
| centi means | 1/100 |
| deci means | 1/10 |
| milli means | 1/1000 |
| Giga means | billion or 1 000 000 000 or 10^9 |
| Mega means | million or 1 000 000 or 10 ^6 |
| Micro means | 1/1000 000 or 1 millionth or 10^-6 |
| nano means | 1/1000 000 000 or 1 billionth or 10^-9 |
| This indicates the amount of matter in an object as gravity pulls down on it | weight |
| Weight is measured in | Newtons |
| Hecto means | 100 |
| This is all the matter in an object | mass |
| weight is measured using a | spring scale |
| 1 centimeter cubed ( cm^3) is | cc |
| 1 cc is the same as | 1 mL |
| Density | How compact the particles are in a volume |
| Law of Mass Conservation | Matter is neither created nor destroyed |
| A way to express very large or very smaller numbers | scientific notation |
| The curved surface of most liquids in a cylinder | meniscus |
| Density = | m/v |
Created by:
kdcribb
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