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Main Curriculum Tie:
Background For Teachers:
Magnets have special properties, qualities or characteristics. We know that magnets could attract, draw objects together. When we turn one magnet the other way, we are not able to keep them together. This unknown force caused the magnets to repel, push apart. This is a world of magnetism. This amazing magnetic force is the push or pull of a magnet on other magnetic material. There are unseen magnetic fields around single magnets, between two magnets attracting each other, and between two magnets repelling each other. North and South polarized ends of magnets are where the strong pulling and repelling occurs. Bar, ring, disc, domino, and horseshoe magnets each have different, distinctly shaped magnetic fields. The lines that form these magnetic field patterns are called magnetic field lines. These lines seem to flow away from the north end of a magnetic field and return again to the south end.
We know that magnets have forces that will draw iron and steel objects toward them. We also know that magnets have poles usually referred to as north and south. Opposite poles attract each other and like poles repel. (North ends attract south ends, South ends attract north ends. North ends repel North ends and South ends repel South ends.) If they are close enough, depending upon the strength of the magnet, they will come together with great force. All magnets show properties of magnetic attraction and repulsion.
With the use of iron filings, we can see these magnetic fields. When iron filings are
sprinkled on a bar magnet, you see that these magnetic field lines start at the magnet's
north end and will end at the magnet's south end. The field lines that curve toward each
other show attraction. You will even see these curved lines if you sprinkle iron filings on
two attracting bar magnets. However, if iron filings are sprinkled between two bar magnets
repelling each other, the magnetic field line will curve away from each other and even
stand on edge. The magnetic field forces are pushing each other away, and this causes the
curving and standing on edge.
Natural magnets are naturally magnetized by Earth’s magnetic field and are made of an iron
ore that is called magnetite. A permanent magnet is an object that keeps its magnetism after
it has been magnetized. Iron and nickel are the most common materials magnets are made
from. You can make a permanent magnet from steel nail by taking a magnet and rubbing
the mail the same direction several times. Now the nail will pick up pins, staples, paperclips
or other small items made of iron.
Intended Learning Outcomes:
Demonstrate to the students the “flying paperclip” magnet pendulum For construction see instructions below in “Activity Connected to Lesson.) Give the pendulum magnet a push, and watch! Vary the location and poles of the magnets to develop other patterns. You can arrange the magnets so that all of them have the same pole up, or you can mix them up. Notice that a tiny change in the location of one of the fixed magnets or in the starting position of the pendulum magnet may cause the pendulum to develop a whole new pattern of swinging.
Ask questions like: Why is the paper clip suspended in mid‐air? How many other things can you attach to a string and suspend with a magnet? Does using a circular magnet alter the experiment? How about a horseshoe magnet?
Have students put their hand between the magnet and the paperclip. Discuss whether they can see or feel the magnetic force field. Let them move the paperclip from the magnetic field. Watch how the magnetic force pulls the paperclip.
A. Inquiring Minds Want to KNOW About the Magnetic Field of a Bar Magnet
Instruct students to use scientific method steps to inquire about magnets. The students will begin to see that scientists are not the only ones who use scientific steps to produce credible explanations of natural phenomena that can be validated by further investigations.
Students write in their journals the first four steps to investigate questions about the magnetic fields of different magnets.
B. Inquiring Minds want to KNOW More about other Magnets
Teacher modeling of Stations ‐ The students will observe the teacher showing them how the stations will work.
C. Inquiring Minds Want to KNOW About the Magnetic Fields of Different Magnets
The students will explore the magnetic fields of other magnets. Provide the materials in tote trays for six different magnets.
Conclusion:Students write their conclusion, addressing their hypothesis, data observations, and knowledge gained from the investigation.
Lesson and Activity Time Schedule:
Activity Connected to Lesson
Activities connected to the lesson are embedded in the lesson.
Instructions for the teacher to do before the activities are included here:
Created Date :