DEFINE MATTER
Anything that has mass and volume
Compare and Contrast Mass and Weight
mass is a measure of the amount of matter. It is independent of gravity. Weight is the effect of gravity on matter.
Why does chemistry involve the study of the changes in the world at a microscopic level
The changes you see with your eyes all begin with changes at the microscopic level.
If your weight is 120 pounds and your mass is 54 kilograms, how would those values change if you were on the moon? The gravitational force on the moon is 1/6 the gravitational force on Earth.
Your mass will still be 54 kilograms, but your weight will be 1/6 your weight on Earth (120 lb/6 = 20 lb)