If objects are the same size they will have the same density.

Different materials have different densities.

Density is made up of two other measurements – mass and volume.

true

The density of a substance like gold is always different.

The density of a substance is the same for all samples of the substance.

The density of water is 1 g/mL. true

An object will float if it is more dense than the surroundingliquid.

An object will float if it is less dense than the surrounding liquid.

gold = 19.3 g/cm3

8 cm3 of gold = 154.4 g

water = 1 g/mL wood = 0.5 g/cm3

8 mL of water = 8 g 8 cm3 of wood = 4 g

1. If you pack more mass into the same volume, it’s more dense.

2cm2 cm

2 cm

Volume = 8 cm3

Mass = 8 g

Volume = 8 cm3

2 cm2 cm

2 cm

Volume = 8 cm3

2 cm

2 cm

2 cm

Mass = 16 g Mass = 24g

Density = 1 g/cm3 Density = 2 g/cm3 Density = 3 g/cm3

2. If you pack the same mass into a smaller volume, it’s more dense.

3 cm3 cm

3 cm

Volume = 27 cm3

Mass = 54 g

Volume = 8 cm3

2 cm2 cm

2 cm

Volume = 1 cm3

1 cm

1 cm

1 cm

Mass = 54 g Mass = 54 g

Density = 2 g/cm3 Density = 6.75 g/cm3 Density = 54 g/cm3

3. Just because something has more mass does not mean that it’s more dense.

Mass = 10 g Mass = 20 g

Volume = 2 cm3 Volume = 5 cm3

Density = 5 g/cm3 Density = 4 g/cm3

definition: the measure of how much mass is contained in a given volume of space

Made up of two measurements: mass and volume

density = massvolume

density of a solid

g/cm3

density of a liquid

g/mL

density

Formula: massvolume

Example:

styrofoam

mass = 8 g

volume = 35 cm3

density = 0.2 g/cm3

mass = 18 g

volume = 20 cm3

density = 0.9 g/cm3

candle

mass = 5 g

volume = 2 cm3

density = 2.5 g/cm3

marbles

mass = 78 g

volume = 10 cm3

density = 7.8 g/cm3

iron

mass = 3 g

volume = 6 cm3

density = 0.5 g/cm3

beach ball

mass = 35 g

volume = 50 cm3

density = 0.7 g/cm3

pumpkin

mass = 81 g

volume = 30 cm3

density = 2.7 g/cm3

aluminum

Definition:the measure of how much mass is contained in a given volume of space

Formula: D = mass volume

Units of Measurement:g/cm

g/mL

Booklet

Density Lab