Friction

7K Forces and their effects

Describe what friction is. Explain how rough and smooth surfaces affect friction. Describe some examples of helpful friction and unhelpful friction. Explain how lubricants reduce friction.
 * Objectives (what you will learn this lesson)**


 * Starter**
 * Review completed work
 * Key term quiz

> media type="file" key="ES7_Kb152_04vco.flv" width="640" height="480" > media type="file" key="ES7_Kb152_06vco.flv" width="640" height="480" > media type="file" key="ES7_Kb152_05ani.swf" width="640" height="480"
 * Activities**
 * 1) What is friction? Read pages 152-3 of Exploring Science 7 and discuss.
 * 2) Learn about how friction is used in rock climbing
 * 1) Learn about how friction helps and hinders mountain bikers
 * 1) Read through the guidelines about [|Investigating friction]. Write up your investigation in your exercise book as you carry it out. If you are not sure how to carry out the investigation look at the animation below:
 * 1) Answer Q1-3 and 5-7 from p152-3 of Exploring Science 7
 * 2) Extension: Read about this unusual sport, [|A curling question], and answer the questions about how friction is a crucial part of it.


 * Summary**
 * Review completed classwork
 * In groups complete [|Friction – true or false?], discuss the findings as a class

Complete the gapfill on [|Friction]. Either copy and complete in your exercise book or print it off when you are done.
 * Homework**


 * Extras **

Tutorials from [|Skoool.co.uk] on [|Friction] and [|Useful Friction]