1. THE AMOUNT OF MATTER IN A GIVEN VOLUME
Density:
THE AMOUNT OF MATTER IN A GIVEN VOLUME

2. UNDERSTANDING DENSITY
Different substances have different densities.
If the density of an object is greater than the density of a fluid, it will sink when placed in the fluid.
What would happen if the density of an object is less than the density of a fluid?

3. UNDERSTANDING DENSITY
Different substances have different densities.
If the density of an object is greater than the density of a fluid, it will sink when placed in the fluid.
What would happen if the density of an object is less than the density of a fluid?
IT FLOATS!!!

4. UNDERSTANDING DENSITY
What if the object has the SAME density as the liquid?

5. UNDERSTANDING DENSITY

6. CALCULATING DENSITY Units:
liquids and gases: grams per millilitre (g/mL)
kilograms per litre (kg/L)
solids: grams per cubic centimetre (g/cm3)

7. Density and PMOM
Most Dense
Least Dense

8. Changing Density Increasing temperature = Lower density
BIGGER SPACES BETWEEN THE PARTICLES, MORE VOLUME
Increasing concentration = increasing density
MORE PARTICLES, SMALLER SPACES

9. Density and Buoyancy
When an object is in a liquid, the force of gravity pulls it down.
The liquid, however, exerts an OPPOSITE force, called the BUOYANT FORCE that pushes the object upward.
If the density of the object is greater than the liquid, the object will sink because
force of gravity > buoyant force.
If the density of the object is less than the liquid, the object will float because
buoyant force > force of gravity.