| Method |
Precise Learning Objective |
Linked |
Question / Activity
(Designed for maximum working out) |
Stepping Stones |
Pitstop Check
(Thinking Map) |
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Most metals in everyday use are alloys. |
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Are most everyday metals pure or alloys? Match up alloys names and what they are made from.
Practical: making solder |
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Bronze is an alloy of copper and tin. Brass is an alloy of copper and zinc. |
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What are the alloys bronze and brass made up of? |
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Gold used as jewellery is usually an alloy with silver, copper and zinc. The proportion of gold in the alloy is measured in carats. 24 carat being 100 % (pure gold), and 18 carat being 75 % gold. |
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What is the percentage of gold in 24 carat and 18 carat gold used for jewellery? |
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Steels are alloys of iron that contain specific amounts of carbon and other metals. |
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What elements are present in the alloy steel? |
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High carbon steel is strong but brittle. Low carbon steel is softer and more easily shaped. |
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How are the physical properties of high carbon and low carbon steels different? |
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Steels containing chromium and nickel (stainless steels) are hard and resistant to corrosion. |
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What are the benefits of stainless steels that contain chromium and nickel? |
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Aluminium alloys are low density. |
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What are the uses of low density aluminium alloys? |
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Students should be able to recall a use of each of the alloys specified. |
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What are the uses of high density steels? |
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