magnetism

What do the lines around this magnet represent?

• North Pole

• South Pole

• Magnetic Declination

• Magnetic Field

What is responsible for the Magnetic Field around Earth?

• The Earth's crust

• The Earth's molton iron core

• The Earth's mantel

• The Sun

Which direction is the North Pole of this electromagnet?

• Right

• Left

• Up

• Down

Electric motors are devices that convert _____ energy into _____ energy.

• electrical; mechanical

• mechanical; electrical

• chemical; potential

• mechanical; kinetic

What kind of magnet can be turned on and off?

• refrigerator magnet

• electromagnet

• magnetite

• iron

The strongest part of a magnet is..

• the bars.

• the force field.

• the poles

If a glass plate is placed over a magnet and iron filings are sprinkled over the glass, a pattern will be visible. What does this pattern indicate?

• The magnetic field

• The electrostatic field

• The piezoelectric effect

• The chemical reaction of the magnet and the filings

How can a wire become magnetic?

• point it north

• add a resistor

• heat it up

• run a current through it

What causes magnetism?

• the sun

• moving neutrons

• moving charges

• friction

the earth behaves likes a magnet

• true

• false