Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Bernoulli’s Principle Natalie O’Neal Vickie Rincones Emily Perkins Brittany Schultz Tenneille Duke 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: 8th grade • Age: 13 & 14 year olds • Languages: 2 - English and Spanish 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 Bernoulli’s Principle • 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 handson experiments. • What should we know before we begin? – Key Terms: Speed, Velocity Who is Bernoulli? • 18th century Swiss scientist • Studied fluid flow in pipes *Fluid = any liquid 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 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 High Pressure/Low Pressure • High Pressure always travels to Low Pressure areas. Experiments • Video Link: http://www.youtube.com/watch?v=ctJyu5ete6Y • Hair dryer demonstration • Coke can demonstration 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. 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. 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. 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. 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.