Magnets
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Magnets only work on some metals. In general,
these metals are iron. Steel is 90% iron.
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A great example of magnets is a compass. The
core of the earth is iron. Thus the magnet at the center of the compass will
pull towards the center of the earth, north.
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Opposites attract with magnets.
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Lesson Activity: Total fortified with iron
cereal for a science experiment. Crush the cereal and run a magnet over it and
the iron is visible.
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Cow Magnet- a magnet that is force-fed to a cow.
This causes any metals that the cow may eat to stay in its first stomach and
not pass on to the other stomach and rip up intestines. Cows eat just about
anything. Lesson Grabber: put a cow magnet in each finger of a glove. Slap the
glove on something metal and leave it hanging. Cow magnets can be found at any
feed store (i.e. Tractor Supply).
Here is an activity to teach students exactly what a magnet will and will not attract:
Here is my lesson plan that I used in a kindergarten classroom:
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