Secretive and wary, weasels are difficult to study in. nature, and many gaps remain in our knowledge of their. reproduction. Two of the species covered in this Wild-. life Note (the ermine and the long-tailed weasel) exhibit.
Extensive - Properties that do depend on the amount of matter present. Mass - A measurement of the amount of matter in a object (grams). Weight - A measurement of the gravitational force of attraction of the earth acting on an object. Volume - A measurement of the amount of space a substance occupies. Length.
Density is a physical property that is determined by dividing the mass of a given amount of a substance by its volume. It is often reported in units of g/mL, which means 'grams per milliliter'. Density is an intensive property because the density of a pure substance will be the same no matter how much of it you have.