Magnet

The Earth is like a giant magnet. This is called...

• Geomagnetism

• Magno-Eartho

• Earthmagnetism

• Magnearth

A mixture of iron filings and sulfur can easily be separated by--

• placing the mixture in water

• performing a chemical reaction

• heating the mixture

• using a magnet

A student uses a magnet to move a .04 kg ball bearing. The magnet exerts a force of 4N, which causes the ball bearing to begin moving. What is the acceleration of the ball bearing when it begins to move?

• .01 m/s2

• .16 m/s2

• 3.96 m/s2

• 100 m/s2

Tags

NGSS.MS-PS2-2

What is NOT a way to increase the strength of an electromagnet?

• decrease the number of coils

• use a stronger battery

• use a stronger magnet

• increase the number of coils

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NGSS.MS-PS2-3

How can you test to see if an electromagnet is stronger after adding more coils of wire?

• if it picks up fewer paperclips

• compass still points toward the electromagnet when moved further away

• if it picks up the same number of paperclips

• compass still points toward the electromagnet when moved closer

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Jacob holds a magnet with the north pole out near a magnet suspended on a string. The magnet on a string spins until the south pole is facing his magnet. Why did the magnet turn direction?

• The like poles are attracted to each other from gravity

• The like poles are attracted to each other from magnetic force

• The unlike poles are attracted because of gravity

• The unlike poles are attracted because of magnetic force

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is the primary component of a magnet that allows it to attract certain metals?

• Iron

• Copper

• Aluminum

• Plastic

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NGSS.MS-PS2-3

Which of the following materials is NOT typically attracted to a magnet?

• Iron

• Nickel

• Cobalt

• Wood

Tags

NGSS.MS-PS2-5

What happens when you cut a bar magnet in half?

• Each half becomes a separate magnet with a north and south pole

• The magnet loses its magnetic properties

• One half becomes a north pole and the other a south pole

• The magnetic strength doubles

Which of the following is a real-world application of magnets?

• Magnetic Resonance Imaging (MRI)

• Solar panels

• Wind turbines

• Hydraulic presses

Tags

NGSS.MS-PS2-3