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In this unit children build on their existing knowledge of forces and learn that forces can be measured and compared. The unit focuses on friction as a force which exists between objects moving across solid surfaces and opposes motion, and the forces of air resistance and water resistance which oppose the motion of objects moving through air and water.
Experimental and investigative work focuses on:
- deciding what evidence should be collected when planning and carrying out a fair test
- making measurements using a forcemeter
- looking for patterns in results, interpreting and suggesting explanations for these.
Work in this unit also offers opportunities to relate knowledge and understanding of frictional forces to everyday contexts and to recognise that science provides explanations for familiar phenomena related to friction.
This unit takes approximately 11 hours.
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