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23 Cards in this Set
- Front
- Back
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matter
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Anything that has mass and takes up space.
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units
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system of measurements (English, metric) In science, numbers mean nothing unless there are units attached to them.
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metric system
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A standard set of units that will be used by everyone.
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mass
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The quantity of matter as determined from its weight or from Newton's second law of motion.
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gram
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In the metric system, the unit for mass is the gram. If an object has a mass of 10 grams, we know that it has 10 times the matter that is in an object whose mass is 1 gram
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Newton
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the metric unit for weight
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slug
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the English unit for mass
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meter
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the metric system's unit for distance
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foot
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the English unit for distance
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liter
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the main unit for measuring volume in the metric system
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gallon
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the main unit for measuring volume in the English system
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seconds
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the way time is measured in both the English and metric systems
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“prefix units”
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There are alternative units for measuring small things as well as alternative units for measuring big things. These alternative units are part of the metric system.
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factor-label method
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conversion method between units within the metric system
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derived units
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Units like cm 3 are called derived units because they are derived from the basic units that make up the metric system.
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graduated cylinder
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When chemists measure volume, they use a graduated cylinder. This device looks a lot like a glass rain gauge. It is a hollow glass cylinder with markings on it. These markings, called graduations, measure the volume of liquid that is poured into the cylinder.
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graduations
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markings on the graduated cylinder that measure the volume of liquid that is poured into the cylinder
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meniscus
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The curved surface of the liquid that is in the graduated cylinder and this surface (the bottom of it) is what you measure by.
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accuracy
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An indication of how close a measurement is to the true value
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precision
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An indication of the scale on the measuring device that was used
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significant figures
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used to determine the precision of a measurement
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scientific notation
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Writing numbers so that no matter how large or how small they are, they always have a decimal point in them.
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density
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An object's mass divided by the volume that the object occupies
Since mL and cm 3 are equivalent, we often see density expressed in grams per cm 3 |
