The+gold+standard

Explain what an alloy is, and give some examples of alloys. Describe some properties of gold that make it useful for jewellery. Explain the meaning of the terms ‘malleable’ and ‘ductile’. Calculate the purity of gold using given information.
 * Objectives (what you will learn this lesson) **


 * Starter **
 * review completed work
 * key term quiz

> Learn about how alloys can be useful in jewellery > media type="file" key="ES8_Gd100_13vco.flv" width="640" height="480"
 * Activities **
 * 1) What is an alloy and why are they useful? Discuss, find a definition and write it in your exercise book.
 * 1) Test your learning by trying to complete this worksheet on [|Gold and it's alloys]
 * 2) Now think about the different [|copper alloys] and see what they can be used for.
 * 3) Make your own jewellery by [|electroplating coins]
 * 4) Extension: research different alloys (other than ones based on copper and gold). Find out how they are different from the metals they are made from and what they are useful for. remember to state your sources in a bibliography.

Review completed classwork / key term quiz
 * Summary **

Download complete the gapfill on [|The gold standard], print-off and stick into your exercise book. You can copy and complete if you have a problem printing.
 * Homework **