NGSS.MS-PS2-3

The force of magnetism is stronger when magnets are ________________

• cold
• round
• closer together
• farther apart

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What are two ways to make an electromagnet stronger?

• 1. add more coils of wire around the iron core
  2. wrap a thinner wire around the core
• 1. add less coils of wire around the iron core
  2.add more electricity flowing through a wire
• 1. add more coils of wire around the iron core
  2. add less electricity flowing through the wire
• 1. add more coils of wire around the iron core
  2. add more electricity flowing through the wire

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NGSS.MS-PS2-3

Magnets that are arranged like this will _______. 

• move away from each other (repel)
• move towards each other (attract)

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Electric fields are often associated with what other kind of field? 

• Magnetic Fields 
• Nuclear Fields 
• Particle Fields 
• Corn Fields 

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Movement of electrons. 

• Nuclear Energy
• Radiant Energy
• Mechanical Energy
• Electrical Energy

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The girl's hair and the comb are attracting  one another.  The hair and the comb have

• opposite charges
• like charges

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S8P5ac Which material could be used for the core of an electromagnet?

• a wooden rod

• a vial of water

• a plastic rod

• a nickel rod

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If you bring two north poles together, or two south poles together, they attract and the magnets stick together?

• True

• False

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In magnets and electromagnets, similar poles attract

• true

• false

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Which statement best describes the electric fields in the image?

• The charges are neutral.

• Both charges are negative, so the field lines are alike.

• The field lines move toward a positive charge and away from a negative charge.

• The field lines move away from a positive charge and toward a negative charge.

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