Density.

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Presentation transcript:

Density

Density- The measure of how compact an object is. Density = mass volume Mass = grams Volume = cm3 Density = g/cm3

On your way home from school you find an antique coin On your way home from school you find an antique coin. To help determine the value of the coin you want to know what it’s made of. You find the mass of the coin to be 48.3 g and the volume to be 4.7 cm3. What is the density of the metal that the coin is made of? Round your answer to the nearest tenth. Density = mass / volume Density = 48.3 g / 4.7 cm3 Density = 10.3 g/ cm3

Gold = 19.32 g/ cm3 Copper = 8.96 g/ cm3 Silver = 10.49 g/ cm3

What is the density of an object with a mass of 40 g and a volume of 30 cm3? Density = mass / volume Density = 40 g / 30 cm3 Density = 1.3 g/ cm3

What is the density of an object with a mass of 20 g and a volume of 15 cm3? Density = mass / volume Density = 20 g / 15 cm3 Density = 1.3 g/ cm3

A brick has a density of 11. 35 g/cm3 and a volume of 48 cm3 A brick has a density of 11.35 g/cm3 and a volume of 48 cm3. What is the brick’s mass? Round to nearest tenth. Mass = Density X Volume Mass = 11.35 g/cm3 X 48 cm3 Mass = 544.8 g

A block of wood has a density of 0. 69 g/cm3 and a volume of 35 cm3 A block of wood has a density of 0.69 g/cm3 and a volume of 35 cm3. What is the wood block’s mass? Round to nearest tenth. Mass = Density X Volume Mass = 0.69 g/cm3 X 35 cm3 Mass = 24.2 g

A rock has a density of 11. 69 g/cm3 and a mass of 78 g A rock has a density of 11.69 g/cm3 and a mass of 78 g. What is the rock’s volume? Round to nearest tenth. Volume = Mass/Density Volume = 78 g / 11.69 g/cm3 Volume = 6.7 cm3 m D v

Density of Water