1. Copyright © 2011 InteractiveScienceLessons.com Electromagnets: 6 mini investigations Have books open to page 628 for some readings

2. Copyright © 2011 InteractiveScienceLessons.com Task: Use the equipment in your box to build an electromagnet.

3. Copyright © 2011 InteractiveScienceLessons.com Good job everyone.

4. Copyright © 2011 InteractiveScienceLessons.com Wire wound evenly from top to bottom One wire tucked in permanently. Other touches on/off.

5. Copyright © 2011 InteractiveScienceLessons.com Task 1: Find the strongest part of the electromagnet.

6. Copyright © 2011 InteractiveScienceLessons.com Electromagnets 1.The strongest part of an electromagnet is… at the ends, just like on a bar magnet. Read p. ___ ¶ __ together

7. Copyright © 2011 InteractiveScienceLessons.com Task 2: Disconnect the current.

8. Copyright © 2011 InteractiveScienceLessons.com Electromagnets 2.Disconnecting the electricity causes… it to lose its magnetism.

9. Copyright © 2011 InteractiveScienceLessons.com Task 3: Wind the wire 10x more.

10. Copyright © 2011 InteractiveScienceLessons.com Electromagnets 3.Winding the wire 10 more times causes… the magnetism to become stronger.

11. Copyright © 2011 InteractiveScienceLessons.com Task 4: Reverse the current.

12. Copyright © 2011 InteractiveScienceLessons.com Electromagnets 4.When the 1.5 volt current is reversed… nothing changes (that we can see).

13. Copyright © 2011 InteractiveScienceLessons.com Task 5: Remove the nail.

14. Copyright © 2011 InteractiveScienceLessons.com Electromagnets 5.Removing the iron core (nail) causes… it to lose (most of) its magnetism.

15. Copyright © 2011 InteractiveScienceLessons.com Task 6: Double the current.

16. Copyright © 2011 InteractiveScienceLessons.com Electromagnets 6.Doubling the electricity causes… the magnet to become stronger.

17. Copyright © 2011 InteractiveScienceLessons.com Try to pick up the car!

18. Copyright © 2011 InteractiveScienceLessons.com Clean up Straighten the wire Reduce residual charge in nail by dropping it down GENTLY on hard floor Put all the parts back in your bin and return it to my desk

19. Copyright © 2011 InteractiveScienceLessons.com Uses of Magnets Read pp.628 – 631 in your Physical Science textbook. Read about some of the uses of electromagnets. Generators and Motors Transformers

20. Copyright © 2011 InteractiveScienceLessons.com Uses of Magnets Your group will investigate a use for magnets and share with the class on the big whiteboards. Include a picture and an explanation!