The material world 1. Mass
What is mass? An indication of the amount of matter in a substance, calculated in kilograms(kg), grams(g) or milligrams(mg)
What is matter A substance that occupies space and has a mass, all physical objects are made of matter, the smallest unit of matter is an atom This Photo by Unknown Author is licensed under CC BY-SA
Mass vs Weight Weight is the strength with which one object attracts another object. ( Gravity) Your weight can change but not your mass. (moon vs earth)
Units of measurement for mass
How to measure mass? P.18 Worlds