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Density

Unit 1 - Nature of Science

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Lesson 3: Questions

  • How does a change in mass and/or volume affect density?

  • What determines if an object will sink, float or remain suspended in a liquid substance?

  • How can density be used to identify a substance?

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Vocabulary

Define the following vocabulary words:

  • Mass
  • Volume
  • Density

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Density

Density - describes the relationship between a material's mass and volume.

Density = Mass D = M

Volume V

Units:

  • _________ = grams (g)
  • Volume = milliliters (mL) or cubic centimeters (cm3)
  • _________ = g/mL or g/cm3

D

M

V

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Density

Density = "Compactness"

CUBE A is more _________ than CUBE B.

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Density

Density = "Compactness"

CUBE B is more _________ than CUBE A.

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Density

Density = "Compactness"

CUBE A and CUBE B have the same _________ .

CUBE A

CUBE B

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Matter Graphic Organizer

Place these terms in the diagram:

-Density

-Volume

-Matter

-Mass

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Density

Water has a density of _________

  • Objects with a density ______ than 1.0g/mL will sink
  • Objects with a density ____ than 1.0g/mL will float

Ping Pong Ball:

  • Density = 0.0840 g/cm3.
  • Less than the density of water (1 g/cm3)
  • Floats

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Density

Water has a density of _________

  • Objects with a density ______ than 1.0g/mL will sink
  • Objects with a density ____ than 1.0g/mL will float

Glass Marble:

  • Density = 2.5 g/cm3.
  • Greater than the density of water (1 g/cm3)
  • Sinks

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Density

1.) Calculate: the density of carbon dioxide gas if 5g occupies a volume of 100mL?

D =

M =

V =

D

M

V

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Density

2.) Calculate: A block of aluminum occupies a volume of 15.0mL and has a mass of 40.5g. What is its density? Will it sink or float in water?

D =

M =

V =

D

M

V

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Density

3.) Calculate: A 10.0 cm3 sample of copper has a mass of 89.6g. What is the density of copper? Will it sink or float in water?

D = ?

M =

V =

D

M

V

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Density

4.) Calculate: A sample of iron has the same dimensions of 2cm x 3cm x 2cm. If the mass of this object is 94 g, what is the density of iron? Will it sink or float in water?

D = ?

M =

V =

D

M

V

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Density

5.) Calculate: Find the mass of 250mL of benzene. The density of benzene is 10 g/mL. �

D =

M =

V =

D

M

V

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Density

6.) Calculate: What volume of silver metal has a mass of exactly 500g. The density of silver is 10.5 g/cm3.

D =

M =

V =

D

M

V