Density

1
Density

• IPC A
• Packet 5

2
Physical Properties

• A. Definition Properties that DO NOT change the
  CHEMICAL NATURE of matter
• B. WILL NOT alter the substance
• C. Examples
• 1.COLOR
• 2. SMELL
• 3. FREEZING POINT
• 4. BOILING POINT
• 5. DENSITY

3
Chemical Properties

• A. Definition Properties that DO change the
  CHEMICAL NATURE of matter
• B. WILL alter the substance
• C. Examples
• FLAMMABILITY
• REACTIVITY WITH WATER

4
Density

• A. Definition a property that describes the
  relationship between MASS and VOLUME (how tightly
  PACKED the molecules are)
• B. Formula to find density D M/V
• a. D DENSITY
• b. M MASS
• c. V VOLUME

5
Density

• Each cube represents 1 mL of volume. The Most
  Dense
• Midrange Density
• The Least Dense

6
Reading a Density Graph
A
B
C
Order of liquids in the graduated cylinder
C
B
A
7
Density of Pigments

• The lower the colors are more dense than the
  colors that moved higher up the paper.

8
The Density Column

• Less Dense FLOATS
• More Dense SINKS.
• The clear liquid is the most dense. Blue is the
  least dense.

9
Water is Weird

• Water expands when it freezes, so its density is
  less than the liquid. That means that ice floats.
  
• Which is good for the fish and other water
  creatures. Why?

10
Density Labs

• Use a balance to measure MASS
• To measure Volume you use
• Graduated cylinder
• Ruler
• Beaker (not your first choice as its not very
  accurate)
• Density mass/volume

11
Its an ID number of sorts

• The density of a substance is the SAME, not
  matter what size of the stuff you have.
• If you divide a block of wood into three pieces
  or 30 the density of the wood is the same number!
  
• You can use the density value to identify the
  substance that you have in your possession. (you
  can also use color and hardness)

12
Dont be Dense

• So now, knowing about density, what does this
  common phrase mean?