Magnets and Magnetic Field Lines

If you hold two magnets a short distance apart and let go, which of the following is a possible result? CHOOSE ALL THAT APPLY!

• they will snap together

• they will be pushed apart

• they will remain motionless

• they will become an electric circuit

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NGSS.HS-PS3-5

Which of the following statements is FALSE?

• All metals are magnetic in nature.

• Any wire that carries an electrical current will produce a magnetic field and will deflect the needle of a compass.

• The force of magnetism is caused by moving electrical charges.

• In an electromagnet, electrical current moving through a wire coil produces a powerful magnetic field.

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

Most of the magnets we encounter in our daily lives contain:

• iron atoms.

• carbon atoms.

• the element copper.

• electric current.

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

In iron and other ferromagnetic materials, the magnetic field produced by one atom influences the motion of electrons in neighboring atoms until they are spinning in sync. True or False?

• True

• False

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NGSS.HS-PS3-5

Explain why the object on the left is not magnetized while the one on the right is magnetized.

• The non-magnetized object on the left has domains with magnetic fields pointing in all directions, while the magnetized object on the right has domains with the magnetic fields all pointing in the same direction.

• The non-magnetized object on the left must be made out of a material other than iron, while the magnetized object on the right must be made out of iron.

• The non-magnetized object on the left has to be plastic, while the magnetized object on the right has to be metal.

• The non-magnetized object on the left is an electromagnet with the electric current turned off, while the magnetized object on the right is an electromagnet with the electric current turned on.

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which of the following are true statements? CHOOSE ALL THAT ARE TRUE!

• All magnets contain a north pole and a south pole.

• The north pole of a magnet is the end that tends to point toward the North Pole of Earth.

• The south pole tends to point towards the South Pole of Earth.

• North poles of magnets are attracted to south poles of other magnets and vice versa.

If the south pole of one magnet is placed near the north pole of another, the field lines join the poles and the two magnets are pulled together. True or False?

• True

• False

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NGSS.HS-PS3-5

Water is repelled by very strong magnets.

• True

• False

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which of the following elements are ferromagnetic?

• iron, nickel, and cobalt

• iron, aluminum, and steel

• iron, copper, and gold

• platinum, lead, and aluminum

Which of the following IS NOT a depiction of magnetic field lines?

• 
• 
• 
• 

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NGSS.HS-PS2-5

NGSS.HS-PS3-5