Notes on mass, volume
& density
Weight

Weight: A measure of the force of gravity
on an object.
Weight
Weight: A measure of the force of gravity
on an object.
 Weight will change if you move an object
from Earth to another planet.

Mass

An unchanging measurement of how
much matter an object contains.
Mass
An unchanging measurement of how
much matter an object contains.
 Mass will stay the same from planet to
planet.

Mass
An unchanging measurement of how
much matter an object contains.
 Mass will stay the same from planet to
planet.
 Mass is measured in grams or kilograms.

Volume

Volume is a measurement of the amount
of space that matter occupies.
Volume
Volume is a measurement of the amount
of space that matter occupies.
 Volume is commonly measured in mL for
liquid and cubic cm (cm3) for solids.

Volume
Volume is a measurement of the amount
of space that matter occupies.
 Volume is commonly measured in mL for
liquid and cubic cm (cm3) for solids.
 The formula for measuring volume is
Length x Width x Height.

Volume

How can you measure the volume of an
object with an irregular shape?
Volume

How can you measure the volume of an
object with an irregular shape?
Put the object in a cylinder containing
water and measure the change in the
volume of water.
One cubic centimeter (cm3) is the
same as

One milliLiter (mL).
Which weighs more, a ton of
feathers or a ton of bricks?
________________
Think about it!
Density

Density is the measurement of how much
mass is contained in a given volume.
Density
Density is the measurement of how much
mass is contained in a given volume.
 The formula for measuring density is
Density = Mass/Volume, or D=M/V.

Density
Density is the measurement of how much
mass is contained in a given volume.
 The formula for measuring density is
Density = Mass/Volume, or D=M/V.
 The / means “per” or “for each,” which in
math is the same as “divided by.”

Density
Density is the measurement of how much
mass is contained in a given volume.
 The formula for measuring density is
Density = Mass/Volume, or D=M/V.
 The / means “per” or “for each,” which in
math is the same as “divided by.”
 Units of measure for density could be
g/cm3, g/mL, kg/mL, kg/cm3, etc.

The density of water

is 1 g/mL, or 1 g/cm3.