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What is Volume Volume is defined as the amount of space taken up by a three-dimensional object. How do we calculate it? We use Length x Width x Height for regular shaped solids. EX: 6 X 6 X 6 EX: 12 x 5 x 6 How to Measure LENGTH Review Most metric rulers have lines indicating centimeters and millimeters. The centimeter lines are the longer, numbered lines. The shorter lines are millimeter lines. When you use a metric ruler, line up the 0-centimeter mark with the end of the object being measured. How many cm? How many mm? How many cm? How many mm? Back to volume.. However, Volume often refers to liquid volume, which is defined as the amount of space taken up by a liquid, which spreads completely to fill its container. Measuring Liquid Volume We will use the graduated cylinder. The reading must be done to the bottom of the meniscus. Volume of Liquids Reading a Meniscus Look to the scale Look to the scale What if its not a regular shape? We then have to measure by displacement Measuring Volume by Displacement Used for irregular shaped objects Select a graduated cylinder large enough to put the object in Add water - at least 10 mL and record accurately SLOWLY add the object to be measured. Read the new level of the water The water will rise an amount equal to the volume of the object What not to do Here’s what the cylinder should look like Do the math 1. 2. 3. Original reading of volume Final volume of water This will equal the volume of the object 22.5 mL - 17.4 mL = 5.1 mL Therefore, the volume of the object by displacement is 5.1 mL How to Measure LENGTH Most metric rulers have lines indicating centimeters and millimeters. The centimeter lines are the longer, numbered lines. The shorter lines are millimeter lines. When you use a metric ruler, line up the 0-centimeter mark with the end of the object being measured. How many cm? How many mm? How many cm? How many mm?