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**Making Measurements in Science**

The standard system of measurement all scientists use is the METRIC SYSTEM

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Measuring Mass Mass is a measurement of the amount of matter in an object Instrument: Balance (triple beam, double pan or electronic) Base unit: gram (g) Other common units: milligram (mg) kilogram (kg) Which is larger than a gram? Which is smaller?

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Measuring Distance Distance is a measurement of how far apart objects are from each other. Instrument: Meter stick Base unit: meter (m) Other common units: millimeter (mm) centimeter (cm) kilometer (km) Which of the units are larger than a meter? Which are smaller?

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**Measuring Liquid Volume**

Volume is a measurement of the amount of space an object or matter occupies Instrument: graduated cylinder or beaker Which instrument will give you a more accurate measurement? Base unit: liter (L) Other common unit: milliliter (mL) Is this smaller or larger than a liter?

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Reading the Meniscus When measuring liquid volume, you must remember to read the meniscus properly The meniscus is curve of a liquid when placed in a cylinder Always make your measurement at the middle of the meniscus What is the measurement in the graduated cylinder?

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**Measuring Solid Volume**

How do you measure the volume of an object that has a regular shape, such as a block of wood? Instrument: meter stick Formula: Volume = l x w x h Base unit: cubic meter (m3) Other common unit: cubic cm (cm3) Why is the unit cubed?

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**Measuring Solid Volume Water Displacement Method**

How do you measure the volume of an object that has a irregular shape, such as a rock? There are actually 2 methods, both involving water. Instrument: graduated cylinder or overflow can Base unit: cubic meter (m3) Other common unit: cubic cm (cm3) Which do you think is more accurate?

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Measuring Weight Weight is a measurement of the force of gravity acting upon an object Instrument: Spring scale Base unit: Newton (N)

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**Measuring Temperature**

Temperature is the measurement of the energy of the molecules in an object The higher the temperature, the faster the molecules are moving Instrument: thermometer Base unit: degrees Celsius (oC) Other unit: Kelvin (K)

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Any Questions?

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The Metric System.

The Metric System.

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