Density – Sinking or FloatingDensity – Sinking or Floating

DensityDensity

Density is the amount of Density is the amount of matter in a given amount matter in a given amount of space.of space.– Density = mass ÷ volumeDensity = mass ÷ volume

Measured in kg/L g/mL, kg/mMeasured in kg/L g/mL, kg/m33, , or g/cmor g/cm33

The higher the density the The higher the density the more likely a thing will more likely a thing will sink.sink.

The lower the density the The lower the density the more likely a thing will more likely a thing will float.float.

Mass is measured on an electronic Mass is measured on an electronic balance in either kilograms or balance in either kilograms or

grams.grams.

Volume is measured in two ways. Volume is measured in two ways. 11stst Way Way

Mathematical equations can be used.Mathematical equations can be used.

22ndnd Way Way Volume is found by water displacement.Volume is found by water displacement.

So density is mass So density is mass ÷ volume÷ volume

So if an object has a mass of 2 kg and So if an object has a mass of 2 kg and a volume of 10 L.a volume of 10 L.

Density = 2 ÷ 10 = 0.2 kg/LDensity = 2 ÷ 10 = 0.2 kg/L

EX:EX: 0.2 kg/L0.2 kg/L

1010 2.02.0

-2.0-2.0

00

Understanding densityUnderstanding density

0.02 g/mL0.02 g/mL

1.0 g/mL1.0 g/mL

2.0 g/mL2.0 g/mL

3.0 g/mL3.0 g/mL

The lower the density, it floats to the top.

If it’s in between densities then its in between other objects of lower and higher densities.

The higher the density, it sinks.

Monkey Ninja Street says,Monkey Ninja Street says,

““Density is Density is important to think important to think about especially about especially when you think of when you think of me cutting the me cutting the mass off someone mass off someone with my monkey with my monkey ninja sword!”ninja sword!”