Suggest how and why friction has been the methods used in terms of friction. reduced or increased in unfamiliar situations. Explaining: Lubrication demonstration Exceeding Demonstrate how a linear air track Draw lines of best fit on scatter works and show students how long a graphs. glider can continue to move if the track is set up with rubber bands at each end. Get students to explain what a lubricant is. Use alternative demonstrations if you wish. Plenary: Thinking about friction Consider All Possibilities: A bicycle is not going very fast. (Possible answers: the axles need lubricating; the brakes are catching; there is a strong wind blowing; the cyclist is not pedalling hard.) Lesson 7Kd: Pressure Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Starter: Demonstrating pressure n/a Resources n/a Demonstrate State what is meant by: pressure. Demonstrate the effects of pressure from 7Kd the effects of Recall that 1 Pa = 1 N/m2. by placing various masses on Exploring pressure by Describe how the pressure depends on modelling clay and measuring the Science. placing various force and area. depth of the impression made. Ask masses on Describe the effects of high or low students to explain the relationship modelling clay pressure in simple situations. between pressure, weight and area. and measuring Securing the depth of the Recall some common units for Exploring: Reducing pressure under impression measuring pressures. vehicles made. Use the formula relating force, Ask students to use the Internet to pressure and area. find pictures of different ways in Exceeding which the pressure beneath vehicles Explain applications of pressure in can be reduced, and to explain why different situations. this is necessary.
Suggest how and why friction has been reduced or increased in unfamiliar situations. Exceeding Draw lines of best fit on scatter graphs. the methods used in terms of friction. Explaining: Lubrication demonstration Demonstrate how a linear air track works and show students how long a glider can continue to move if the track is set up with rubber bands at each end. Get students to explain what a lubricant is. Use alternative demonstrations if you wish. Plenary: Thinking about friction Consider All Possibilities: A bicycle is not going very fast. (Possible answers: the axles need lubricating; the brakes are catching; there is a strong wind blowing; the cyclist is not pedalling hard.) Lesson 7Kd: Pressure Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing State what is meant by: pressure. Recall that 1 Pa = 1 N/m2. Describe how the pressure depends on force and area. Describe the effects of high or low pressure in simple situations. Securing Recall some common units for measuring pressures. Use the formula relating force, pressure and area. Exceeding Explain applications of pressure in different situations. Starter: Demonstrating pressure Demonstrate the effects of pressure by placing various masses on modelling clay and measuring the depth of the impression made. Ask students to explain the relationship between pressure, weight and area. Exploring: Reducing pressure under vehicles Ask students to use the Internet to find pictures of different ways in which the pressure beneath vehicles can be reduced, and to explain why this is necessary. n/a Resources from 7Kd Exploring Science. n/a Demonstrate the effects of pressure by placing various masses on modelling clay and measuring the depth of the impression made.
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