Science at key stage 3 (Year 9)
Unit 9L: Pressure and moments
Section 8: b. How do levers work?
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Objectives |
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- about examples of levers in the body
- how pairs of antagonistic muscles produce turning effects at skeleton joints
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Activities |
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Outcomes |
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Children: |
- Ask two pupils to arm wrestle (gently) to demonstrate how arms act as levers. Elicit pupils' ideas about how longer arms are an advantage.
- Show or ask pupils to make a model of the arm with the biceps and triceps attached, as an example of antagonistic muscles. Identify the elbow joint as the pivot and ask pupils to explain how the forearm operates as a lever, both up and down.
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- describe the arrangement of muscles on the arm and associate them with the parts of a lever
- explain how an antagonistic muscle pair works
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Points to note |
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This unit is divided into sections. Each section contains a sequence of
activities with related objectives and outcomes. You can view this unit by
moving through the sections or print/download the whole unit.
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