Finding+the+way

8J On the move

Recall what a magnetic field is. Describe the shape of a magnetic field around a bar magnet. Recall the direction of a magnetic field. Describe the Earth’s magnetic field.
 * Objectives (what you will learn this lesson)**

Review homework / key term quiz
 * Starter**

> media type="file" key="ES8_Jd142_12vvv.flv" width="360" height="270" > media type="file" key="ES8_Jd143_07ani.swf" width="640" height="480" > media type="file" key="ES8_Jd142_11vvv.flv" width="360" height="270" > media type="file" key="ES8_Jd142_10ani.swf" width="640" height="480"
 * Activities**
 * 1) Review what a magnetic field is
 * 1) How does the magnetic field around an electromagnet compare with a bar magnet?
 * 1) [|Plot the magnetic field around a bar magnet and an electromagnet] using a compass to find out for yourself (make sure you add arrows to show the direction). Watch the video and simulation for help:
 * 1) Now try to answer the [|questions on magnetic fields]
 * 2) Answer Q1, 2 and 5 from p142-3 of Exploring Science 8
 * 3) Extension: How do magnets interfere with each other? Place magnets close to each other and plot their combined magnetic fields. [|Use this worksheet to guide you if you need help.]
 * 4) Extension: Learn more about magnetic fields by playing [|Electric Field Hockey by PhET]

Review completed classwork / key term quiz
 * Summary**

Complete the gapfill on [|Finding a way]. Copy and complete in your exercise book if you have problems printing it out. Use a magnet at home (fridge magnets are a good source to try and [|make a paperclip levitate]
 * Homework**