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 atoms in certain types of metals

• the pairing off of electrons in certain types of metals

Describe what happens when magnets attract. What happens when magnets repel?

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.

• The mantle of the Earth is comprised of gold and cobalt, causing its magnetic sphere.

Magnets can be used in everyday life. What does MRI stand for? What does the magnetism in an MRI help accomplish?

• Magnetic Resonance Imaging; helps doctors see inside patients without surgery

• Magnetic Resonance Imaging; used for cooking

• Magnetic Resonance Imaging; helps in construction

• Magnetic Resonance Imaging; used for entertainment

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

• nickel

match the following

• magnetic field

• materials that are often characterized as hard, shiny,

  and conductive; magnets are attracted to many types

  of these

• repel

• to push back from something; resist

• metals

• the basic unit of all elements; a very small particle

• solar wind

• the area around a magnetic material in which a

  magnet will be close enough to react to that material

• atom

• charged particles that stream out

  from the Sun

Match the following

• force

• negatively charged particles inside an atom

• electrons

• the strength or energy of something

• core

• the deepest layer of the Earth

• attract

• to pull something closer; draw something in

• magnet

• A piece of material whose atoms are arranged so that it

  attracts other materials with the same atomic pattern