DENSITY. The amount of mass per unit of volume Items with low density: feathers, marshmallows, pillows, etc. Items with high density: rock, most metals,

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Presentation transcript:

DENSITY

The amount of mass per unit of volume Items with low density: feathers, marshmallows, pillows, etc. Items with high density: rock, most metals, etc.

Mass The amount of matter in an object Metric units are grams (g) or kilograms (kg) Measured with a digital scale NOT WEIGHT! (that’s mass compared to gravity)

VOLUME The amount of space an object takes up Measured in 3 ways: 1.REGULAR SOLIDS - Length x width x height (ruler) - in cm 3 2.LIQUIDS - use a graduated cylinder or beaker – in mL

VOLUME 3.IRREGULAR SOLIDS Displacement (Archimedes Principle) - add object to a known volume of water - the amount the water rises is the volume of the object - since density of water is 1, use grams because the object is a solid

Eureka! YouTube: 8Fk 8Fk

CONVERSIONS Mass: 1000 g = 1 kg Volume: 1000 mL = 1 L cm 3 = 1 m cm = 1 m 100 x 100 cm = 1 m x 100 x 100 cm = 1 m 3