CWK 8.8B: Electricity and Magnetism Benchmark Review

How do we represent an area of stronger magnetic force on a magnet?

• By adding more field lines

• By separating the field lines

• By drawing the field lines shorter

• By drawing the field lines toward the North Pole

Are the magnetic field lines in the picture to the right correct?

• Yes, because they point from north to south

• No, because they point from north to south (they are supposed to go the other way)

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A bar magnet is a ________________________.

• Permanent Magnet

• Temporary Magnet

• Compass

• Induced Magnet

True or False: The magnetic field around a permanent magnet can be turned off and on.

• True

• False

True or False: A magnet can have just a North Pole.

• True

• False

What happens to an object whenever it is negatively charged?

• The atoms in the object lose protons

• The atoms in the object lose electrons

• The atoms in the object gain electrons

• The atoms in the object gain protons

The paper shavings shown in the picture to the right are attracted and move upward sticking to the DVD. Which statement about what is shown in the picture is most likely false?

• The paper and DVD are both electrically charged.

• The paper and the DVD must be oppositely charged.

• A transfer of electrons has occurred.

• The paper and DVD are both positively charged.

Tags

NGSS.MS-PS2-3

Which of the following statements best describes static electricity?

• The balance of electrical charge on an object

• The discharge of electrical charge

• The imbalance of electrical charge on an object

• The build-up of protons in the nucleus of an atom

The image to the right shows the removal of electrons from a perspex rod by rubbing it with a cloth. This will give the rod a:

• Negative charge

• Positive charge

• Neutral charge

Tags

NGSS.MS-PS2-3

You rub a balloon on your hair. The balloon becomes negatively charged; therefore, your hair:

• Gained neutrons

• Lost protons

• Lost electrons

• Gained atoms

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5