The Force Be with You!

Where does the force that creates a magnetic field come from?

• the activity of protons in atoms.

• the activity of neutrons in atoms

• the pairing off of electrons in certain types of metals

What happens when magnets attract?

• the magnets pull away from each other

• the magnets pull toward each other

• the magnets get lost

What happens when magnets repel?

• the magnets pull together

• the magnets push away from one another

• the magnets turn blue

According to the information in the article, the Earth acts like a giant magnet. Which of the following is correct about the Earth's magnetism?

• Earth's mantle is made up of silver and nickel, which gives it a magnetic sphere.

• Earth's core is comprised of iron and nickel, which causes its magnetic field.

• The core of the Earth is made up of iron and copper, giving it a magnetic field.

Magnets can be used in everyday life. What does MRI stand for?

• Magnetic resonance imaging

• Metal rising instantly

• Magnets raising ice

What does the magnetism of an MRI help accomplish?

• The MRI helps teachers to read.

• The MRI helps doctors see inside patients without surgery.

• The MRI helps the fireman put out fires.

A magnet will attract to many types of surfaces. Which of the following surfaces will a magnet not be attracted to.

• iron

• cobalt

• stainless steel

A magnetic field is:

• the area around a magnetic material in which a magnet will be close enough to react to that material.

• the basic unit of all elements.

• the deepest layer of the Earth.