Ch. I Celebration of Learning

A magnet on your refrigerator drops on the floor. When you put it back on the door, it slides down. What has happened to the strength of the magnets?

• It has become weaker, because its magnetic domain is more aligned
• It has become stronger, because its magnetic domain is less aligned
• It has become weaker, because its magnetic domain is less aligned

Where is magnetic force the strongest for a magnet?

• Far from the poles
• Closest to either pole
• In the middle

Which of the following would most likely cause a bar magnet to demagnetize?

• Break the magnet in half
• It is placed in the freezer for a year.
• Heat up the magnet by a significant amount

When two magnets are brought close to each other, they repel each other. What can be concluded about these magnets?

• The magnets have been demagnetized
• A north pole and a south pole were brought together
• Either two north poles or two south poles were brought together.

In what TWO (2) ways can the domain of a magnet become scrabbled causing it to lose its magnetism?

• High Heat
• Impacts
• Getting wet

Which diagram best represents two magnets attracted to each other?

• A
• B
• C
• D

If a bar magnet is cut in half, what is the result?

• A
• B
• C
• D

What is observed when iron filling are sprinkled over a magnet like in the picture below?

• Magnetic poles
• The magnetic field
• The nucleus of the atom
• the magnetic domain

What are the ways to adjust the strength of an electromagnet? (more than one answer)

• Adjust the size of the iron core
• Adjust the number of coils
• Adjust the location of the Electromagnet
• Adjust the amount of power coming from the power source

Which of the following is true about the relationship between electricity and magnetism?

• Electricity can be used to create a magnet
• Magnetism and electricity cannot be converted into one another
• Magnetism is based on how gravity attracts electrical energy.
• Electrical energy and magnetism cancel each other out.