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Unit 1 Vocab JKosch
Question | Answer |
---|---|
Precision | The agreement between several measurements of the same quantity |
Accuracy | The agreement between a measured value and the true value |
Significant digits | The certain digits in a measurement as well as one uncertain digit which you have estimated |
Quantity | A property that can be measured and described by a number and a unit that names the standard used |
SI Base Units | Seven fundamental units (meter, kilogram, second, Kelvin, mole, ampere, candela |
Area | How much surface something covers |
Volume | Area multiplied by height |
Data | Observations and facts collected in science |
Density | Defined as mass per unit volume or ratio of mass to volume |
Slope | The ratio of the change in y to the corresponding change in x for any two points on a line |
Constant | Quantity that has the same value as the slope of a straight-line graph representing a direct proportion |
Macroscopic Observations | Observations made about what you see, feel, and smell in a world made up of matter |
Chemical changes | Changes that produce a new kind of matter with different properties |
Melting | The term used to describe the change of solid to liquid |
Solid | Substance with definite volume and shape |
Liquid | Substance that flows and takes the shape of it container |
Gas | Substance that takes the shape of and fills its container |
Submicroscopic | On an invisible level |
Fluid | Any substance that flows |
Mixture | Matter that can be physically separated into component parts |
Electrolysis | Passing an electric current through a substance, causing it to decompose into new kinds of matter |
Elements | Pure substances that CANNOT be decomposed into new kinds of matter. |