1. Mass Weight measure of quantity of matter in an object
measure of the downward pull (gravity) of the earth an object
experiences
not constant, depends on gravity
constant, does not depend on gravity
determined by comparing the mass of an object with a set of standard masses that are part of a balance
determined by reading the amount that an object pulls down on a spring

2. Mass vs. Weight
On the Moon the downward pull is approximately 1/6 of that on Earth
1988 Leonid Taraneko set the world lifting record by lifting kg
1 kg weighs about 9.8 N or 2.2 pounds on Earth

3. earth
moon
deep space
downward pull
mass (quantity of matter in kg)
weight (pounds)
weight (newtons) 1
1/6
475.0
475.0
475.0
1045
174.2
4655
775.8

4. Will it hurt? no yes no no no yes no yes ACTION EARTH SPACE SHIP
tennis ball
bowling ball
drop on toes
hit with fist no
yes no no no
yes no
yes

5. Mass 1 g = 1 small paper clip
1 mg = 10 grains of salt or 2 drops of water.
1 gram is defined as the mass of 1 mL of water at 4 ºC.
1000 g = 1000 mL of water
1 kg = 1 L of water