Matter (3 main states (or "Phases") (Gas, Liquid, Solid),…
3 main states (or "Phases")
How much space something takes up
Related to gravity
Triple Beam Balance
How much matter is in an object
Not the same thing as weight
Is air matter?
What is our evidence? How did we measure the mass and volume of air?
Put air inside a ball and measure the air
"Dunking" the graduated cylinder
Flask and "thumb over the tube" demonstration