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2-Measurement
Term | Definition |
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Precision | refers to the ability to take the same measurement and get the same result over and over |
Accuracy | refers to how close a measured value is to the true measurement (true value) of something |
Weight | A measure of the pull of gravity between an object and the earth. Therefore, weight is actually a measure of force. |
Mass | A measure of the quantity (or amount) of material in a substance |
Volume | The amount of space that matter occupies or takes up. (For solids, length x width x height) |
Length | A measure of how long an object is or the distance an object spans. |
Density | The amount of matter per unit of volume. How much matter occupies a given space. Density equals mass divided by volume |
Temperature | A measure of the average kinetic energy (energy of motion) of particles of matter. |
Force | The amount of push or pull on an object, such as gravity and magnetism. |
Pressure | The amount of force exerted per unit area. Pressure equals force divide by area. |
Extrinsic (extensive) properties | Properties that change based on the amount of substance present. Mass is an example of an extrinsic property. The larger an object, the more mass it has. |
Energy | A measure of the ability to do work or generate heat. There are many different forms, including mechanical, chemical, and thermal energy |
Multipliers | prefixes greater than one, such as deca–, kilo–, and giga– |
Intrinsic (intensive) properties | Properties that do not change based on the amount present. (a small amount water has the same density as a large amount) |
Scientific notation | The method scientists use to quickly write very large or very small numbers by writing 10 with an exponent instead of many zeroes. |
Fractions | prefixes less than one, such as deci–, milli–, and nano– |