1. Bernoulli’s Principle Natalie O’Neal Vickie Rincones Emily Perkins Brittany Schultz Tenneille Duke

2. Introduction Subject: Science Objective: To discover Bernoulli’s Principle Materials: Hair dryer, ping pong balls, balloons, straws, and coke cans Methods: Notes and experiments Grade: 8 th grade Age: 13 & 14 year olds Languages: 2 - English and Spanish

3. Strategies Sheltered Instruction Scaffolding by repetition of vocabulary Cooperative learning by working in groups Students learn through:  Kinesthetics by performing experiments  Auditory learning by listening to lecture  Visual learning by seeing realia and watching video

4. Bernoulli’s Principle

5. What are we learning today? –Bernoulli’s Principle Why are we learning about it? –To understand pressure systems and apply them to real life examples How are we going to learn? –We will learn through note-taking and hands- on experiments. What should we know before we begin? –Key Terms: Speed, Velocity

6. Who is Bernoulli? 18 th century Swiss scientist Studied fluid flow in pipes *Fluid = any liquid

7. Vocabulary Speed = Rapidez - how fast something moves Formula: Distance / Time Velocity = Velocidad – speed of an object and its direction of motion Air Pressure = Presión de Atmosférica – the force exerted by air on any surface in contact with it Lift = Ascender – raise from a lower position to a higher position *Exerted = pushed

8. Bernoulli’s Principle Textbook Definition: When the speed of a fluid increases, internal pressure in the fluid decreases. Our Definition: When speed increases, pressure decreases. *Increase = to go higher *Pressure = a type of force *Decrease = to go lower

9. High Pressure/Low Pressure High Pressure always travels to Low Pressure areas.

10. Experiments Video Link: http://www.youtube.com/watch?v=ctJyu5ete6Y http://www.youtube.com/watch?v=ctJyu5ete6Y Hair dryer demonstration Coke can demonstration

11. Additional Examples 1. Umbrella –The curved part of an umbrella causes air moving across it to have a higher velocity (similar to an airplane’s wing). –On a windy day, the higher velocity creates much lower pressure on the top of the umbrella. –The high pressure under the umbrella pushes up to the lower pressure, causing the umbrella to turn inside out.

12. Additional Examples 2. Faucet and ball –The moving water creates low pressure because of the increased velocity. –The high pressure around the stream pushes the ball towards the low pressure, causing it to touch the water stream.

13. Additional Examples 3. Perfume Sprayer –When you squeeze the bulb, air rushes across the open end of the tube to create low pressure. –Higher pressure on the liquid pushes it up and it is carried away by the stream of air.

14. Additional Examples 4. Insects –Insects increase their lift by flapping their wings forward and backward, not up and down. –The tilt of their wings provide an angle to create low pressure and lift.

15. Additional Examples 5. Shower curtain –When taking a shower, the moving water creates low pressure inside the shower. –High pressure outside the shower moves towards the low pressure, causing the shower curtain to swing against your legs.