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Cambridge IGCSE Combined Science practice

Paper 6 structured question: Alloys and their properties

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Alloys and their properties

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Paper 6Alternative to PracticalPractical3 marks

Analyzing the results of an alloy hardness test.

Results Table

Results of Alloy Hardness Test

The table below shows the hardness values of different alloys tested.

AlloyHardness (HV)
Steel200
Brass150
Aluminum Alloy100
  1. a

    Explain why steel is harder than aluminum alloy based on the results.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 6 structured question: Alloys and their properties

Paper 6Alternative to PracticalPractical1 marks

Method

Method for Testing Alloy Hardness

1. Prepare samples of different alloys. 2. Use a hardness tester to measure the hardness of each sample. 3. Record the results in a table. 4. Repeat the test for accuracy.

Alloy TypeHardness (HV)
Steel200
Brass150
Aluminum Alloy100
  1. a

    State the independent variable in this experiment.

    Aim for approximately 1 distinct marking point.

    [1]