MASS AND
WEIGHT
DEFINITIONS
Mass- the amount of matter an object has.
Matter- something that has mass and takes
up space.
Weight- is the amount of mass of an object,
it is dependent upon gravity.
Units for Measuring Mass
 Mass
is measured in grams and
kilograms.
1
paper clip= 1 gram
 1000g=1 kilogram
 The average human adult weighs 75kg.
Tools for Measuring Mass
**The Triple Beam Balance is the tool we
use to measure mass.
How to use a Triple Beam
Balance
1. Make sure the balance scale is at zero.
2. Place the object to be weighed on the
balance plate and move the largest RIDER
one notch at a time until the beam drops.
Move the rider back one notch until it locks
into place.
3. Move the next largest rider until the
beam drops. Back it up one notch, and
lock it in place.
4. Move the smallest rider until the beam
swings equally above and below the
zero mark.
• ADD UP ALL THE NUMBERS AND
THAT WILL GIVE YOU THE MASS!
**Always remember to write the unit
of mass down. (ex.- kg, g)**
COMPARE AND CONTRAST
MASS
vs.
WEIGHT
 Always remains constant
Depends on gravity
 Does not depend on gravity
weight=mass x gravity
weight of an object
changes if the gravity
changes
THE END