Copyright © 2011 InteractiveScienceLessons.com Electromagnets- 6 mini investigations Have books open to page ___ for some readings.

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Presentation transcript:

Copyright © 2011 InteractiveScienceLessons.com Electromagnets- 6 mini investigations Have books open to page ___ for some readings

Copyright © 2011 InteractiveScienceLessons.com Task: Build an electromagnet.

Copyright © 2011 InteractiveScienceLessons.com Good job everyone.

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

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

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

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

Copyright © 2011 InteractiveScienceLessons.com Electromagnets 1.The strongest part of an electromagnet is… at the ends, just like on a bar magnet. 2.Disconnecting the electricity causes… it to lose its magnetism.

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

Copyright © 2011 InteractiveScienceLessons.com Electromagnets 1.The strongest part of an electromagnet is… at the ends, just like on a bar magnet. 2.Disconnecting the electricity causes… it to lose its magnetism. 3.Winding the wire 10 more times causes… the magnetism to become stronger.

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

Copyright © 2011 InteractiveScienceLessons.com Electromagnets 1.The strongest part of an electromagnet is… at the ends, just like on a bar magnet. 2.Disconnecting the electricity causes… it to lose its magnetism. 3.Winding the wire 10 more times causes… the magnetism to become stronger. 4.When the 1.5 volt current is reversed… nothing changes (that we can see).

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

Copyright © 2011 InteractiveScienceLessons.com Electromagnets 1.The strongest part of an electromagnet is… at the ends, just like on a bar magnet. 2.Disconnecting the electricity causes… it to lose its magnetism. 3.Winding the wire 10 more times causes… the magnetism to become stronger. 4.When the 1.5 volt current is reversed… nothing changes (that we can see). 5.Removing the iron core (nail) causes… it to lose (most of) its magnetism.

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

Copyright © 2011 InteractiveScienceLessons.com Electromagnets 1.The strongest part of an electromagnet is… at the ends, just like on a bar magnet. 2.Disconnecting the electricity causes… it to lose its magnetism. 3.Winding the wire 10 more times causes… the magnetism to become stronger. 4.When the 1.5 volt current is reversed… nothing changes (that we can see). 5.Removing the iron core (nail) causes… it to lose (most of) its magnetism. 6.Doubling the electricity causes… the magnet to become stronger.

Copyright © 2011 InteractiveScienceLessons.com Clean up Straighten the wire Reduce residual charge in nail by throwing it down on hard floor Put 4 new handouts in your box

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