1. DENSITY Depends on: Depends on: Mass Mass Volume Volume D = m/v (g/cm 3 ) D = m/v (g/cm 3 ) Mass usually expressed in grams Volume usually expressed in cm 3 or liters, etc.

2. What would take up more space??? A kilogram of feathers….. or a kilogram of steel?? OR

3. The proximity of like atoms or molecules The proximity of like atoms or molecules More than just the “heaviness” of a substance, density includes how much space an object takes up!! More than just the “heaviness” of a substance, density includes how much space an object takes up!! All substances have density including liquids, solids, and gases All substances have density including liquids, solids, and gases Density is the measure of the “compactness” of a material

4. “Compactness”

5. DETERMINING DENSITY mass, then measure displacement of a liquid (usually water) by that irregularly shaped object mass, then measure displacement of a liquid (usually water) by that irregularly shaped object

6. Relative Density (Speific Gravity) Instead of just speaking of density, we use a standardized label, specific gravity. Instead of just speaking of density, we use a standardized label, specific gravity. So we compare the density of a material vs. the density of water So we compare the density of a material vs. the density of water