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Year 8 - Design and technology

Testing physical properties of materials

Material testing

Unit Summary

This unit will develop pupils' knowledge of the physical and working properties of materials. They will compare material properties through testing, with a focus on metals. The environmental and social impact of materials will also be introduced.

Lesson Summary

You will learn to test the physical properties of materials.

Key Notes

  • The physical properties of materials can be tested.
  • A material's density can be calculated by comparing its mass and volume.
  • A material's absorbency can be measured by taking the wet weight away from the dry weight.
  • Electrical conductivity of materials can be tested circuits to show whether a material is a conductor or an insulator.

Vocabulary To Learn

  • density: a measurement of mass per unit volume
  • absorbency: the ability of a material to soak up liquids
  • electrical conductivity: the ability of material to allow electricity to flow through it

Common Mistakes To Avoid

  • Absorbent materials hold water on their surface.

3 Quick Questions (With Answers)

1. Explain the lesson in two key points.

The physical properties of materials can be tested. A material's density can be calculated by comparing its mass and volume.

2. What does this key word mean in this lesson? 'density'

a measurement of mass per unit volume.

3. Correct this common mistake.

Mistake: Absorbent materials hold water on their surface. Correction: Absorbency involves the liquid being drawn into the material.

More Lessons In This Unit

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