Volume (square objects, like a box)
Volume is the: amount of space something takes up.
FACTS ABOUT VOLUME MEASURMENTS:
• Volume is found by multiplying three distances.
• Volume = (Length) x (Width) x (Height)
• Units are also multiplied and become “cubed” 3
20 m
10 m
10 m
Length = 10m
Width = 10m
Height = 20m
(10m) X (10m) X (20m) = 2000m3
Volume (liquid, like water in a cup)
FACTS ABOUT LIQUID VOLUME MEASURMENTS:
• The unit for liquid volume is the Liter (L).
• Volume is found using a graduated cylinder.
• Units for small volumes are milliliters (ml).
You should always read a
graduated cylinder at the
bottom of the curve of the
liquid. That curve is called
the meniscus.
50
40
30
20
1L
= 1000 mL
Common Conversions
0
Mass
Mass is the: amount of matter “stuff” something is made of. Mass
will not change unless you add or take away matter.
FACTS ABOUT MASS MEASURMENTS:
• The unit for mass is the gram (g).
• Large masses are measured in kilograms (kg).
• A triple beam balance (NOT A SCALE) is used to measure mass.
1 kg
= 1000 g
Common Conversions
Weight
Weight is: how much gravity pulls on you or on any other object,
such as a planet.
Gravity changes from one place to another
150 Newtons
and thus so does your weight.
25 Newtons
The more massive the object,
the more it will pull on you...
You press
down less
on the
scale.
AND THE HIGHER YOUR
WEIGHT WILL BE.
MOON
1/6 the gravity
EARTH
Density
Density is: how closely packed particles in a substance are.
Said another way, Density is: the amount of matter (mass) in a
given space (volume).
Density = mass (g)
volume (cm3)
m= 10g
v = 10cm3
m = 10g
v = 2cm3
d= 1g/cm3
d= 5g/cm3
LESS DENSE
MORE DENSE
Density
Density = mass (g)
volume (cm3)
FACTS ABOUT DENSITY MEASURMENTS:
• Density is found by dividing a mass (g) or (kg) and a volume (cm3)
or (ml).
• Units must also be divided: Example: g/cm3.
Mass = 20g
3
=
2g/cm
Volume = 10cm3
Density
Density = mass (g)
volume (cm3)
• Given any two of these quantities (density, mass, or volume) you
can find the other by either multiplying or dividing appropriately.
Density = 2g
= 20g
3
Volume = 10cm
Mass = ?
(2g) x (10cm3)
m
d
v
Density Triangle