Floating+Trains

8J On the move

Recall the rules for magnets attracting and repelling. Recall what materials are magnetic. Describe how to make an electromagnet stronger. Describe some applications of electromagnets.
 * Objectives (what you will learn this lesson)**

Review homework / key term quiz
 * Starter**

> media type="file" key="ES8_Jc140_03vvv.flv" width="360" height="270" > media type="file" key="ES8_Jc140_11ani.swf" width="640" height="480" > media type="file" key="ES8_Jc140_08vco.flv" width="360" height="270"
 * Activities**
 * 1) You are given have 3 sealed envelopes, one contains a magnet, one contains a piece of iron and one contains a piece of aluminium. Work out what is inside the envelopes without opening them using the magnet provided. You have 3 minutes to decide, then declare your choice and then together as a class open the envelopes to see if you were right.
 * 2) View the video and animation about magnets
 * 1) Discuss what rules you can make about magnets from the activity you have just completed. Copy and complete the rules about magnets from the board.
 * 2) Learn about Maglev trains
 * 1) Look at the demonstration of the floating magnet to see how Maglevs work
 * 2) Answer Q5, 6 from p140-1 of Exploring Science 8
 * 3) See the demonstration to prove that electrical current in a wire generates a magnetic field (you can also review this [|tutorial])
 * 4) [|What is an electromagnet?] Watch brainpop to find out
 * 5) Investigate how to [|Making strong electromagnets]
 * 6) Extension: [|Safer circuits]

Review completed classwork / key term quiz
 * Summary**

Create a presentation about the uses of electromagnets:
 * Homework**
 * Your presentation can contain a maximum of 20 slides
 * No slide can have text on it other than a title
 * You must prepare notes to explain each use of electromagnets - you will be talking as your slideshow runs
 * Automate your slideshow (slides may only be shown for 20 seconds)
 * Slideshows maybe either in Movie, PDF or PowerPoint format

[|Magnetism and electromagnets explained by brainpop] [|What is a magnets and how can you make them?] [|How can you destroy magnets?]
 * Extra Information**