Recall the meanings of some prefixes used in the SI system (centi, milli, Plenary: Thinking about pressure kilo). Consider All Possibilities: You are sinking into the ground. (Possible answers: your feet do not have a big enough surface area to reduce the pressure; you are too heavy for the surface; the ground is boggy.) Lesson 7Ke: Balanced and unbalanced Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Starter: Balanced forces n/a Resources n/a Demonstrate State what is meant by: balanced from 7Ke various Demonstrate various situations where forces, unbalanced forces. Exploring situations forces are balanced (e.g. a Explain the effects of balanced and Science. where forces filled balloon tied to a mass to stop it unbalanced forces in simple situations. are balanced. rising). Discuss the types of forces Securing Discuss the and how students know they are Explain why a vehicle needs a force types of forces balanced. from the engine to keep moving at a and how constant speed. students know Exploring: Modelling forces Describe how new evidence changed they are Show students an image of a scientific ideas. balanced. situation with a way of showing the Exceeding forces present. Ask them to design Explain the effects of balanced and better or clearer ways of representing unbalanced forces in unfamiliar forces and movement. situations. Explaining: Forces and speed Show students clips of moving objects (e.g. motor cars, boats) and explain the forces on them to show that balanced forces do not affect the speed of moving objects. Provide additional clips for students to discuss whether the forces on the objects are balanced or unbalanced.
Recall the meanings of some prefixes used in the SI system (centi, milli, kilo). Plenary: Thinking about pressure Consider All Possibilities: You are sinking into the ground. (Possible answers: your feet do not have a big enough surface area to reduce the pressure; you are too heavy for the surface; the ground is boggy.) Lesson 7Ke: Balanced and unbalanced Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing State what is meant by: balanced forces, unbalanced forces. Explain the effects of balanced and unbalanced forces in simple situations. Securing Explain why a vehicle needs a force from the engine to keep moving at a constant speed. Describe how new evidence changed scientific ideas. Exceeding Explain the effects of balanced and unbalanced forces in unfamiliar situations. Starter: Balanced forces Demonstrate various situations where forces are balanced (e.g. a balloon tied to a mass to stop it rising). Discuss the types of forces and how students know they are balanced. Exploring: Modelling forces Show students an image of a situation with a way of showing the forces present. Ask them to design better or clearer ways of representing forces and movement. Explaining: Forces and speed Show students clips of moving objects (e.g. motor cars, boats) and explain the forces on them to show that balanced forces do not affect the speed of moving objects. Provide additional clips for students to discuss whether the forces on the objects are balanced or unbalanced. n/a Resources from 7Ke Exploring Science. n/a Demonstrate various situations where forces are balanced. Discuss the types of forces and how students know they are balanced. filled
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