1. Review 3.3 What is density? What are two factors that affect density?
How does the Particle Model of Matter help explain density (in reference to temperature)
What is buoyancy?
What is buoyant force?

2. Unit A: Mix and Flow of Matter
3.0 Properties of Liquids and Gases
3.4 Compression of Fluids

3. Review of Density Density is the amount of matter in a given volume
Not all substances have the same density
It is the kind of particles in a substance that are important in determining the density of a substance

4. Review of Calculating Density
Density is the mass (weight) per unit of volume (size)
Density is found by dividing the mass of a substance by its volume
Density (d) = Mass (m)
Volume (V)
Liquids and gases are usually measured in grams per millilitre (g/mL) or kilograms per litre (kg/L)
Solids are usually grams per cubic centimetre (g/cm3)

5. Compressibility
Compressibility is the extent to which a solid liquid or gas can be compressed
Compression is the decrease of volume and the increase of density due to a force pushing on an object
Objects under compression tend to deform in shape

6. Compressibility
Compression of a golf ball

7. Compressibility Gases can be compressed much more than liquids
In fact very little compression takes place in a liquid. Materials in a liquid state are said to be incompressible
Incompressible=cannot be compressed easily
Liquid
Gas

8. Compressibility

9. Review ???Any Questions??? I have some for you…
What is compressibility?
What state has the most compressibility?
What is incompressibility?