Flying toilet paper, funnel ball and curve balls Miss Laverty 2012 ***experiments, lesson and worksheet adapted from the Edmonton Public School Division.

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Presentation transcript:

Flying toilet paper, funnel ball and curve balls Miss Laverty 2012 ***experiments, lesson and worksheet adapted from the Edmonton Public School Division curriculum book***

Tuesday, March 6 th )Hand out the work books 2)Grab today’s handout 3)Sit down and show me you are ready to make some toilet paper FLY!

Flying Toilet Paper Materials: one roll of toilet paper and one blow dryer

Flying Toilet Paper Procedure: 1.Have someone hold the toilet paper horizontally with their index fingers 2.Blow over the top of the roll with the hair dryer set on full speed 3.Observe and record results 4.Clean up the mess!

Flying Toilet Paper Results: – the toilet paper unraveled off of the roll and lifted into the air

Flying Toilet Paper Variations: Try this experiment with a strip of paper. Hold one end of the paper under you bottom lip and blow over the surface of the paper to make the paper to lift

Flying Toilet Paper Diagram

Flying Toilet Paper Inferences – Fast moving air exerts less pressure on the surfaces that it passes over – The air moving over the top of the roll has less pressure than the normal air below it – The normal air pressure is considered high compared to the fast moving air above the paper – This causes the normal air pressure under the paper to lift or rise the paper – This demonstration of Bernoulli’s principle

Flying Toilet Paper Real life examples – Streamers on a fan – Kite flying

Funnel Ball Challenge: try to blow the ball out of the funnel using only your breath Materials: funnel and ball (Styrofoam or Ping- Pong)

Funnel Ball Procedure: – Put the ball in the funnel and hold the funnel upright – Predict what will happen when you blow into the funnel – Blow hard into the funnel – Observe and record results

Funnel Ball Prediction: I predict that when I blow into the full the ball will _____________________. – Fly out, stay in, hover…

Funnel Ball Results: When I blew into the funnel the ball ____________________________________. Variations: Try this experiment upside-down. Does the ball stay in the funnel when you are blowing? Explain

Funnel Ball Diagram

Funnel Ball Inferences: – The air blowing through the funnel is moving quickly – Fast moving air exerts less pressure over the surfaces that it passes – This fast moving air creates a low pressure area – The regular air pressure of the room pushes down on the ball stopping it from leaving the funnel

Funnel Ball Would stronger, faster air flow blow out the ball? Let’s try the blow dryer!

Funnel Ball Real life examples – Curve ball in baseball –

Title Pages Work on title page sections: – Air takes up space and exerts pressure – Air is fluid and capable of being compressed – Air is composed of different gases – Bernoulli’s principle