Magnetic Forces

3rd Grade Science

Motion and Matter: Forces

Force and Motion: Magnetic Force

Every Magnet has two different sides , or ends called Poles. One poles is called the north pole. The other is called the south pole.

Force and Motion: Magnetic Force

Every Magnet is surrounded by an invisible magnetic field. This field is made up of countless lines going out from the north pole in larger and larger loops and coming back to the magnet at the south pole.

Motion and Matter: Forces

Magnetic Force

Magnets push and pull. Scientists call push or pull force. The force exerted by a magnet is called a magnetic force.

When 2 magnets interact, they can pull together, or attract, or they can push apart, or, repel.

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Force and Motion: Magnetic Force

If the same poles of two magnetic approach each other , the fields will push on each other or repel.

Force and Motion: Magnetic Force

If the opposite poles of two magnetic approach each other , the fields will pull towards each other or attract.

Motion and Matter: Forces of Magnetism

Working in pairs you will experiment with magnets.

1)Test what happens when you bring two magnets close to each other.

2) Test the small bar magnetic with the hanging bar magnetic.

Force and Motion: Magnetic Force

Small Bar Magnetics

Small Bar Magnet and Popsicle stick

Draw, Label and Record your observations in the spaces above

Force and Motion: Magnetic Force

Does the magnetic force only work when the magnet is touching something or can the force work at a distance?

1)Test the magnetic force my tying a paper clip on the end of a string then swing the paperclip over the magnetic.

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2)Place a magnet on opposite sides of a popsicle stick

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Record your observation on your observation sheet.

Force and Motion: Magnetic Force

Small Bar Magnet and Paperclip

Small Bar Magnet with Hanging Magnet

Draw, Label and Record your observations in the spaces above

Force and Motion: Magnetic Force

1)Tape the one end of string to the table and tie a paperclip to the other end of the same string. Can you make the paperclip flow in the air, but not touch the magnet?

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2)what happens when you stack ring magnets on a Pencil?

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Record your observation on your observation sheet.

Force and Motion: Magnetic Force

Small Bar Magnet and Paper Clip and String

Ring Magnets on Pencil

Draw, Label and Record your observations in the spaces above

HOW IS THE MAGNETIC FIELD AFFECTED WHEN MORE MAGNETS ARE ADDED?

Let’s test how magnetic fields are affected by measuring the force of magnets on a paper clip.

Start with one magnet at Zero on your tape measure then slowly move a paperclip toward the magnetic ½ cm at a time a release the paperclip.

You are watching for the paperclip to SNAP toward the magnet.

When the paperclip SNAPs to the magnet, record how far the paperclip moved on the chart.

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Name:____________________________________

Directions: Start with one magnet at Zero on your tape measure then slowly move a paperclip toward the magnetic ½ cm at a time a release the paperclip.

You are watching for the paperclip to SNAP toward the magnet.

When the paperclip SNAPs to the magnet, record how far the paperclip moved on the chart.

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Fill in the table below. Record the distance at each point where the paperclip snaps to the magnet.

Which magnet grouping was the strongest?

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Which magnet grouping was the weakest?

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Draw and Annotate you findings when testing the magnets and paperclip.

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Name:______________________________

Magnetic Force Testing

Magnet , Paperclip Snap Recording Chart