Scientific Measurements

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US Customary Units vs. The Metric System

• In the United States our units of measurement is based on the old English units.

• For science it is much simpler to use the French devised units because it is base on increments of 10l

A_Brief_History_of_Measurement

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• To measure how long or how far an object is

• Volume is the amount of space that something occupies.

• The SI unit for volume is cubic centimeter or liter

• A graduated cylinder is used to measure volume.

Volume of a solid

• To measure the volume of a regular solid, measure the length x width x height.

• Your answer will be in cubic centimeters or cm3.

• Remember in science we always use the metric system.

• To measure length –use meters.

Rectangular Prisms

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How to use a Graduated Cylinder

• In a graduated cylinder, the liquid surface curves downward to form a meniscus.

• To measure accurately, read the scale at eye level at the lowest part of the meniscus.

Measuring_Volume

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• Mass is the amount of matter that an object contains.

• An object’s mass always stays the same no matter where the measurement is taken.

• Mass and weight are not the same.

Measuring_Mass

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• There are three different scales used to measure temperature.

• Fahrenheit scale – water freezes at 320 and boils at 2120F

• Celsius (centigrade) scale- water freezes at 00C and boils at 1000C

• Kelvin scale – there are no negative numbers in the Kelvin scale. 00K is the lowest possible temperature.

Measuring_Temperature