Force and Motion · JHS2 Science

Lesson notes

Learning Objectives

Indicator: B8.4.4.2.1 - Identify complex machines and describe their functions in life

By the end of the lesson, learners can:

Define a complex machine and distinguish it from a simple machine with at least two clear differences.
Identify at least three simple machines (lever, pulley, wheel and axle, inclined plane, screw, wedge) embedded within a given complex machine.
Describe the function of at least two complex machines found in their daily lives, explaining how those machines combine simple machines to do work.
Explain, with a specific example, how a complex machine can improve the quality of life in their community.
Construct a labelled diagram of one complex machine showing the simple machines inside it.

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Curriculum details

Strand: Forces and Energy (Strand 4)
Sub-strand: Force and Motion (4.4)
Content standard: B8.4.4.2 - Demonstrate understanding of complex machines and how they work
Indicator: B8.4.4.2.1 - Identify complex machines and describe their functions in life
Suggested placement: Term 3, Week 2 (Week 26 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: Science, Common Core Programme (JHS1-JHS3), 2023, p. 75
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

1. Recap what simple machines are from B7.4.4.2.1
2. Explain what complex machines are and show how different they are from simple machines.
3. Identify simple machine in complex machines.
4. Explain how the functions of a complex machine can improve the quality of life.