Understanding Magnetic Force

What is the name of a magnet that stays magnetic only while it touches a permanent magnet, or one that is magnetic for a very short time

• Temporary magnet
• Permanant magnet
• Electromagnet
• Magnet

The picture is an example of an:

• Electric circuit
• Electromagnet
• Electric nail
• Electric power cell

what do magnets produce?

• attraction
• area of magnetic force called a magnetic field.
• a force against your hand

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what can be attracted to magnets?

• wood
• skin
• Metals such as iron, nickel and cobalt

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what is the earths magnetic field useful for 

• deflecting the solar wind, charged particles that come from the Sun.
• wind
• sun
• light

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how are electromagnets created?

• forces
• light
•  an electric current running through a surrounding coil. They have many uses including the generation of electricity in hydroelectric dams.

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What will happen when these magnets are brought close together?

• They will attract each other.
• They will repel each other.
• Both magnets will turn to the left
• Both magnets will turn to the right

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What characteristics do magnetic substances have?

• They can give you a "shock" when you touch them
• They can push or pull objects without touching them
• They are always black and cold to touch
• They fall faster than other objects when you drop them

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How is Earth's magnetic field similar to that of a magnet?

• It is hundreds of miles long
• It has north and south poles
• It is made in Earth's core
• It is shaped like a horseshoe

What is our best evidence that Earth has a magnetic field?

• All things fall toward Earth's center
• A compass needle lines up with it
• Winds blow from east to west
• Earth's oceans all have currents