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M V D Notes September 16, 2014
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MASS Definition: Unit: grams (g) or kilograms (kg) Quantity of matter
a measure of the amount of "stuff" in something. Unit: grams (g) or kilograms (kg)
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Mass (cont.) Mass is not measured in POUNDS--pounds are weight! (Weight is a force, but more about that later!)
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Mass Measurement Tool Electronic balance
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Volume How much space matter occupies Units: cm3 or ml 1 cm3 = 1 ml
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Volume Measurement Tool #1
Ruler (measured in centimeters) Unit: cm3 (cm x cm x cm) V = L x W x H
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Volume Measurement Tool #2
Water Displacement (unit: mL) Final Level Initial Level Volume (mL)
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Density Density is mass per unit of volume.
Lead is (more or less) dense than styrofoam. A loaf of bread is (more or less) dense than a brick.
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How to Calculate Density:
Density: D=m/v Units: g/mL or g/cm3 D =
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Density The metric system was designed so that the density of water = 1 g/ cm3 or 1000 kg/m3 DH20 =1 g/cm3
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Think about it! A rock from the moon fell in the parking lot at Skyview. To determine its density, a brilliant student measured its mass (10.0g) using an electronic scale and determined its volume (5.0 mL) using water displacement. What is the density of this moon rock?
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Think about it! The mass of the rectangular prism below is 10 g. What is the density of the rectangular prism below? 3 cm 2 cm 4 cm
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