Unit 8.3 Quiz 1

Which of these materials would be attracted to a magnet?

• penny

• piece of zinc

• iron nail

• copper wire

Answer explanation

The iron nail is attracted to a magnet because it is made of ferromagnetic material, which responds to magnetic fields. In contrast, a penny, zinc, and copper are not magnetic and will not be attracted.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The north pole of one magnet will ___________ the south pole of another magnet.

• not interact with

• attract or pull

• repel or push

Answer explanation

The north pole of one magnet will attract or pull the south pole of another magnet due to the fundamental magnetic principle that opposite poles attract each other.

Tags

NGSS.3-PS2-3

The south pole of one magnet will ___________ the south pole of another magnet.

• not interact with

• attract or pull

• repel or push

Answer explanation

The south pole of one magnet will repel or push the south pole of another magnet due to the principle that like poles repel each other, while opposite poles attract.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which object will be strongly attracted to a magnet?

• copper wire

• lead pipe

• steel plate

• glass marble

• wooden block

Answer explanation

The steel plate is ferromagnetic, meaning it is strongly attracted to magnets. In contrast, copper, lead, glass, and wood are not magnetic and will not be attracted to a magnet.

Based on the chart below, which object can a magnet attract?

• brass

• scissor

• gold ring

• silver spoon

Answer explanation

A magnet can attract objects made of ferromagnetic materials. Among the options, scissors are typically made of steel, which is magnetic, while brass, gold, and silver are not attracted to magnets.

Tags

NGSS.MS-PS2-3

Which object can a magnet attract and repel?

• iron nail

• aluminum foil

• compass needle

• copper coil

Answer explanation

A compass needle can be attracted to a magnet due to its iron content and can also be repelled depending on the orientation of the magnet. This dual behavior distinguishes it from the other options listed.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

When we built and tested a homemade speaker, we changed a variable to see if we could make the sound louder. What was the manipulated (independent) variable?

• volume of sound

• type of coil

• number of magnets

• number of coil wraps

Answer explanation

The manipulated (independent) variable is the 'number of magnets' because changing this directly affects the strength of the magnetic field, which influences the loudness of the sound produced by the speaker.

When we built and tested a homemade speaker, we changed a variable to see if we could make the sound louder. What was the responding (dependent) variable?

• volume of sound

• type of coil

• number of magnets

• number of coil wraps

Answer explanation

The responding (dependent) variable is the volume of sound, as it changes in response to the manipulated variables like the number of magnets or coil wraps. Thus, the correct choice is the volume of sound.

Tags

NGSS.MS-ETS1-3

NGSS.MS-ETS1-4