Magnetism Guided Notes Brainpop Answers 1j386

TEACHER COPY Magnetism BrainPOP

1. A magnet is any material that produces a magnetic field is basically a

magnetic field. A

force field. It’s an invisible area of

force that extends all around a magnet. That force attracts metals like iron, nickel, and cobalt. When those metals fall inside a strong enough magnetic field, they become temporarily magnetic. 2. All metals have arrangements of

atoms inside them called

magnetic domains. Usually, the poles of these domains are jumbled up, so they cancel each other out. In a magnet, all of the domains are lined

up, so that they face in the same direction.

That creates a magnetic

field.

3. Magnetic fields get

weaker the further away from the magnet you

go. Every magnet has a

north and south pole. It’s true that

opposites attract – a north pole will attract a

south pole. Two of

the same poles repel each other. Any magnetic metal has and south poles too, and

north

weak magnetic fields surrounding them.

4. Comes work because the

Earth has its own magnetic field, with

magnetic north and south poles. It pulls at lightly balanced pieces of

metal, like a com needle. That’s why a com needle always points north! 5. When you run an electric creates a

current through a piece of wire, it

magnetic field around the wire. That’s an

electromagnet. You can control the

strength of the magnetic field

by changing the amount of electric

current you run through the

wire. 6. Why were things attaching themselves to Moby? Be specific. What kinds of things were sticking to Moby? Tim turned up Moby’s current from 50 to 150 because Moby is a robot, and robots have electromagnets. Tim increased the strength of the magnetic field by increasing the electric current. Metal objects were sticking to Moby, like paper clips, nails, a tin can, and a refrigerator.