Investigation 3: The Force of Magnetism/Part 1: Magnets & Materials

Investigation 3: The Force of Magnetism

Part 1: Magnets & Materials

The object is a magnet. It is called a permanent magnet because it is always magnetic.

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​What Objects Stick to Magnets?

​a. Collect all the magnets from your group. Store them. You may not use the magnets during the predicting phase.

b. Get one bag of test objects. As a group, divide the objects into two identical sets of 19 objects each.

c. Work in groups. Each group sorts one set of objects into two piles:

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Objects you think WILL stick to magnets Objects you think WON'T stick to magnets

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d. Record your predictions on notebook sheet 19 and/or on the next slides.

e. Get your magnets and test your predictions.

f. Record the results.

Poll

What materials do you predict will stick to magnets?

• Aluminum foil

• aluminum nail

• black rock

• brass ring

• cardboard

Poll

What materials do you predict will stick to magnets?

• copper foil

• paper fastener

• plastic chip

• plastic straw

• river rock

Poll

What materials do you predict will stick to magnets?

• rubber band

• sponge

• steel nail

• steel paper clip

• steel screen

Poll

What materials do you predict will stick to magnets?

• steel screw

• steel washer

• wood stick

• wool yarn

Open Ended

Put all the objects back into the bag. Return the bags to the materials station.

Is there anything you notice that is the same about all the things that stick to magnets?

Open Ended

Are there any metals in the "Things that don't stick" column?

Open Ended

What do you think is different about the metal items that stick to magnets and the metal items that don't?

Multiple Select

Which objects stick to magnets and which conduct electricity?

• Sticks to Magnet

• Doesn't Stick to Magnet

• Conducts Electricity

• Doesn't Conduct Electricity

Multiple Select

Which objects stick to magnets and which conduct electricity?

• Sticks to Magnet

• Doesn't Stick to Magnet

• Conducts Electricity

• Doesn't Conduct Electricity

Multiple Select

Which objects stick to magnets and which conduct electricity?

• Sticks to Magnet

• Doesn't Stick to Magnet

• Conducts Electricity

• Doesn't Conduct Electricity

Multiple Select

Which objects stick to magnets and which conduct electricity?

• Sticks to Magnet

• Doesn't Stick to Magnet

• Conducts Electricity

• Doesn't Conduct Electricity

Multiple Select

Which objects stick to magnets and which conduct electricity?

• Sticks to Magnet

• Doesn't Stick to Magnet

• Conducts Electricity

• Doesn't Conduct Electricity

Multiple Select

Which objects stick to magnets and which conduct electricity?

• Sticks to Magnet

• Doesn't Stick to Magnet

• Conducts Electricity

• Doesn't Conduct Electricity

Multiple Choice

Compare and contrast the magnetic and conductivity properties of objects. Which pair of sentences is true?

• All metals stick to magnets.

• Some metals stick to magnets. Some metals

  conduct electricity.

• Some metals stick to magnets. All metals conduct

  electricity.

• All metals stick to magnets. Some metals conduct

  electricity.

Multiple Choice

A student has two keys. One is iron. One is aluminum. How can the student test the keys to find the one made of iron?

• Use a test circuit; only the iron key will conduct electricity.

• Use a test circuit; only the aluminum key will conduct electricity.

• Use a magnet; only the aluminum key will stick.

• Use a magnet; only the iron key will stick.