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Lesson X

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Lesson X

  1. 1. LESSON x: 3.6 Understanding Bernoulli’s principle Pedagogy: Observation and classroom discussion with LCD presentation Time: 2 periods DEVELOPMENT OF LESSON Learning Activities Content T&L Strategies / Methods Introduction Refer to text book page 100. (Work sheet is given out to students.) (30 – 40 minutes) (i) When a fluid moves, there is a change in Carry out activities to gain its fluid pressure. • Carry out Activity 3.6A, 3.6B, 3.6C an idea that fluid velocity (ii) The higher the fluid velocity, the lower text book page 101. Teachers are affects fluid pressure. the fluid pressure. advised to split the students in groups Writing observations on to do the 3 activities. The 3 activities work sheet. are placed in 3 separate stations to encourage as many students as possible to participate actively in them. The groups rotate among stations. • Students fill in answers in their worksheet as they do the activities. Scientific Skills : Observing, inferring, predicting Development 1 Bernoulli’s principle states that the pressure • Teacher states Bernoulli’s principle. (10 – 15 minutes) of a moving fluid decreases as the speed of (Text book page 100) Referring to text book, the fluid increases. • Teacher demonstrates Bernoulli’s discussion. principle using a Venturi tube. (Text book page 102)
  2. 2. Development 2 • Students carry out experiment 3.5 (30 – 35 minutes) (practical book page 55). Practical session. • Students write down their Write down the observations. observations. Development 3 The airplane wing (an aerofoil) is shaped in • Students are requested to refer to text (10 – 15 minutes) such a way that the air flowing past it creates book page 103, Physics in Action to Refer to text book, discuss a lifting force on it. The lift is strong enough discuss applications. applications of Bernoulli’s to balance out the gravitational pull on the • View computer simulations to observe principle. airplane. air flow over an aerofoil to gain an Answer questions in work idea on lifting force sheet. • Guide students to go through the questions in the work sheet. Scientific Skills : Connecting and predicting. Moral and Scientific Value: • Having critical and analytical thinking. • Being flexible and open-minded. Closure (i) Summary from work sheet. • Guide students to summarise the (5 to 10 minutes) (Go over the answers work sheet.) lesson by referring to their work sheet. Summarising the lesson. • Give homework to students – 3.6 Problem solving Questions (text book page 104) (homework) Moral and Scientific Value: • Having an interest and curiosity towards the environment. • Cooperation

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