Title: Buoyancy and Viscosity
1 2Buoyancy
- Why are objects easier to lift in water?
- Is it easier to swim in the ocean or in a lake?
Why?
3 How is viscosity important in
Viscosity
- Exclusive property of fluids
4- Viscosity is determined primarily by shape of
fluids molecules
Which of these would be more viscous?
Why?
Large, bumpy molecules cause more friction than
small, smooth molecules.
5Liquid viscosity decreases with increase in
temperature.
- What happens to hot fudge on your sundae after a
few minutes?
- How is the type of motor oil that you use
affected by the change of seasons?
6States of Matter
Solids
- Molecular motion?
- Shape and volume?
7Liquids
- Molecular motion?
- Shape and volume?
8Gases
- Molecular motion and spacing?
- Shape and volume?
9Plasma
- Temporary, high-energy state of molecules
- Exists on the sun, in neon lights,
and lightning
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10 11How does temperature affect the state of a
substance?
12Melting
Does size affect melting point?
Different substances have different melting
points.
13Freezing
A substances freezing point and melting point
occur at the same temperature.
14Boiling
Different substances have different boiling
points.
15Condensation
Why does your glass get sweaty?
Condensation and boiling occur at the same
temperature.
16Sublimation
- Can you think of something that sublimes?
17Deposition
Example Water vapor in the freezer becomes
frost
18Heat
19Pressure also affects state changes.
- Freezing points are also affected.