1. Fluids  SWBAT: define and explain examples of pressure, buoyant force, Archimede’s principle and Pascal’s principle.

2. Fluids Pressure- Amount of force exerted per unit of area. Unit: Pascal

3. Fluids  Buoyant Force- the upward force that fluids exert on matter.  Archimede’s Principle- buoyant force on an object in a fluid is equal to the weight of the fluid displaced by the object.  Explains why boats, ships and barges float.

4. Fluids (Blaise Pascal)  Pascal’s Principle- pressure applied to a fluid is transmitted unchanged (equally) throughout the fluid.  Diver Demo- Diver dives no matter where we push on the bottle because the pressure is exerted equally through the bottle.

5. Fluids and Gas Laws  SWBAT: define and give examples of Boyle’s law, Charles’s law, Gay- Lussac’s law, Bernoulli’s Principle

6. Gas Laws (Robert Boyle)  Boyle’s law- If you decrease the volume of a container of gas, the pressure of the gas will increase, provided the temperature does not change.  Example: If you squeeze a balloon making it smaller, the pressure will increase (and it may pop).  http://en.wikipedia.org/wiki/File:Boyles_L aw_animated.gif http://en.wikipedia.org/wiki/File:Boyles_L aw_animated.gif http://en.wikipedia.org/wiki/File:Boyles_L aw_animated.gif

7. Gas Laws (Jacques Charles)  Charles’s law- the volume of gas increases with increasing temperature, provided the pressure does not change.  Page 90- Liquid Nitrogen  http://en.wikipedia.org/wiki/File: Charles_and_Gay- Lussac%27s_Law_animated.gif http://en.wikipedia.org/wiki/File: Charles_and_Gay- Lussac%27s_Law_animated.gif http://en.wikipedia.org/wiki/File: Charles_and_Gay- Lussac%27s_Law_animated.gif

8. Gas Laws (Joseph Louis Gay-Lussac)  Gay-Lussac’s law- the pressure of a gas increases as the temperature increases if volume of the gas does not change.  Spray cans (like spray paint) may explode when heated.

9. Fluids (Daniel Bernoulli)  Bernoulli’s Principle- As the velocity of a fluid increases, the pressure exerted by the fluid decreases.

10. Fluids  Assignment:  Answer the following section review questions found on page 86- 1,2,3.  Answer the following section review questions found on page 78-1,3,4,5

11. For the test:  Make sure you know the definitions for Boyle’s law, Charle’s law, Archimede’s principle, Pascal’s principle, and Bernoulli’s principle.  Make sure you can explain one of the demonstrations done in class and identify which law or theory the demonstration shows.