Key Concepts + Vocab
A ______ force can attract or repel an object at a distance.
What is magnetic?
To pull objects toward one another.
What is attract?
Why is the Earth considered a big magnet?
Because it's core is made of mainly iron
What are the only 3 things that can stick to a magnet?
Iron, nickel, and cobalt
What are three common household items that use magnets?
Fridge doors, speakers, hard drives
In a system of magnets there is a repelling force between like poles and an ______ force between opposite poles.
What is attracting?
To push objects away from each other.
What is repel?
The name of metals that are affected by magnets.
What are ferromagnetic metals?
Magnetism comes from moving electrons. What do we call moving electrons?
Electricity
Where is the earth’s magnetic field the strongest?
Strongest at the poles
The pattern of magnetic field lines around attracting magnets is different from the pattern of magnetic field lines around _______ magnets.
What is repelling?
One of the two ends of a magnet.
What is a magnetic pole?
The Earth's South Pole
What is Antarctica?
The electrons are all lined up
Are some planets magnetic fields stronger than the Earth’s? If so, which ones?
Jupiter, Saturn, Uranus, and Neptune
Space around a magnet in which magnetic forces can act on objects.
What is magnetic field?
Something that can be changed and may be measured.
What is a variable?
The Earth's North Pole
What is the Arctic?
What happens when you cut a magnet in half? (ex. Is one half only a north end and the other half only a south end?)
You end up with two smaller magnets, that still have a north pole and south pole
Do all planets have magnetic fields?
No
Line that connects opposite magnetic poles and represents strength and direction of magnetic field.
What is a magnetic field line?
To separate or set apart.
What is isolate?
Most common mineral made into a magnet
What is iron?
The Earth is considered a giant magnet because its core is made mostly of what two substances?
Mostly iron and nickel
How can you make an electromagnet?
Wrap a wire around a nail, and then connect the two ends of the wire to the posts of a dry cell. Then, make the nail touch the clips.