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Published byKristina Sharp Modified over 4 years ago

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Metric System (international system of units or SI) - A decimal system (based on 10) that scientists and everyone else in the world uses, except the U.S.

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Meter - basic unit of length. A little more than 3 feet. Use to measure a room. Kilometer - = 1000 meters. Use to measure long distances. About 2/3 of a mile. Centimeter - 100 cm = 1 meter. Use to measure smaller objects, like a bird. Millimeter - 1000 mm = 1 meter. Use to measure even smaller objects, like the pupil of an eye. Micrometer - 1 million = 1 meter. Use to measure microorganisms. Nanometers - 1 billion = 1 meter. Use to measure very small organisms, like viruses.

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The amount of space an object takes up is called its volume. Liter - (L) the basic unit of volume in the metric system, slightly larger than the quart. Milliliter-(mL) 1/1000 of a liter: 1000 mL= 1 L Use L and mL to measure liquids and gases.

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Kilogram - (Kg): a little more than 2 lbs. Gram - (g): 1/1000 of a Kg. 1000 g = 1 Kg Milligram - (mg): 1/1000 of a gram

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Mass is not equal to weight Mass - the measure of the amount of matter in an object. Is constant Weight - is a measure of the force of attraction between objects due to gravity. Is not constant.

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The measurement of how much mass is contained in a given volume of an object. Density=Mass/Volume Every substance has its own characteristic density.

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Scientist use the Celsius scale 0 degrees = the freezing point of water. 100 degrees = boiling point of water.

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1. What are 2 benefits of using the International System of Units? 2. What is the basic unit for length? For mass? For volume?

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