Different+changes

8G All that glitters

Explain the difference between a physical change and a chemical reaction. Give an example of a chemical reaction that needs heat to start it off. Describe what happens in a precipitation reaction. Write word equations for chemical reactions.
 * Objectives (what you will learn this lesson) **


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

> media type="file" key="ES8_Gb096_09ani.swf" width="640" height="480"
 * Activities **
 * 1) Review different changes, are they chemical or physical changes?
 * 1) Discuss and review what the signs are that a reaction is a physical or a chemical one
 * 2) Investigate and find out [|Is there a reaction?]
 * 3) Complete the worksheet on [|Precipitation and decomposition] to summarise your learning
 * 4) Copy and complete the table. Decide whether a chemical reaction is a decomposition, precipitation reaction or neither.
 * 5) Answer Q8 from p96-7 of Exploring Science 8
 * 6) Extension: Complete [|the concept map] to show how what you have learn this lesson fits in with the chemistry you have learnt previously

Review completed classwork / key term quiz
 * Summary **

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

There are lots of different types of chemical reactions what the video to see some different examples media type="file" key="ES8_Gb097_06vvv.flv" width="640" height="480"
 * Extras**