what is density?
mass per unit volume of a material
objects that are less dense have what?
a lower mass
particles are more spread out
objects that are more dense have what?
larger mass
particles are closer together
formula for density?
p= m/v
what is density measured in?
kg/m cubed
gases are more or less dense than solids?
less dense than solids
why are gases less dense than solids?
molecules are more spread out
same mass over a larger volume