Measuring Mass
• Mass is the amount of
matter in an object
• Matter is some thing that
has mass and takes up
space
Units for measuring mass
• Mass is measured in grams
and kilograms
• 1 paper clip =1 gram
• 1000g = 1kg
• Average human adult is 75 k
=
Tools for measuring Mass
• The triple beam balance
How to use a triple beam balance
• 1) Make sure that the balance scale is at zero.
• 2) Place object on balance scale the larges and move the
largest rider one notch at a time until the beam drops.
Move the rider back one notch (make sure it lock in
place)
• 3) Move the next largest rider until the beam drops.
Back it up one notch.
• 4) Move the smallest rider until the beam swings
equally above and below the zero mark.
• 5) Add up all the numbers to find the mass!
Calculate The Mass
Mass Vs Weight
Weight depends on gravity
Mass does not depend on gravity
The mass of an object always
remains the same
Weight equals Mass X gravity
The weight of an object
changes if the pull of gravity
changes
The astronaut travled
to the moon what can
you tell me about his
mass and wieght on the
moon compared to
earth