So

1
So.. What?

• Real life density, diffusion, and other atomic
  stuff.

2
The Duck Pond

• When feeding the ducks at first dam, have you
  ever noticed that you can control whether the
  bread floats or sinks?

3
Archimedes (250 BC) - Density

• Archimedes was a Greek mathematician who
  discovered how to use water displacement to
  measure volume.
• Archimedes was able to use this to prove that the
  kings craftsman was cheating him.

4
Oil Spills - density

• When a big ship has an oil spill, where does the
  oil go? (hint oil is less dense than water)
• Why is that a bad thing?
• Oil Spill Video

5
Oil Spills
6
Body Mass Indexes - density

• These two people have the same height, and the
  same mass.
• How does their density differ?

7
Body Mass Indexes
8
Dead bodies - density

• Why do dead bodies sink first, then float to the
  top of the water?

9
Dandelions - Density

• Why does dandelion fluff float through the air
  after you blow it off?
• How does its shape help it to float?

10
Perfume - diffusion

• How does perfume spread throughout a room?
• Why do you put perfume on your wrists and your
  neck?

11
Chocolate chip cookies

• Why is it so much easier to smell chocolate chip
  cookies when they are cooking?

12
Breath in winter Diffusion

• 1- Why can you see your breath in winter and not
  in summer?
• 2- Why does your breath quickly disappear after
  you see it?

13
Neutron star densities

• Neutron stars are the most dense thing in the
  universe (not counting a black hole).
• 1 cm3 of neutron star would have a mass of
  6,171,324,762,000 grams!