science test 3/20 magnetic fields

how do magnets move other objects?

magnets move by pulling on materials that have iron

the strength of the magnetic force can depend on which two factors?

amount of charge and distance

magnetic fields allow some objects to exert forces on each other even when they are not _____

touching

what are two metals that are attracted by magnets?

iron and nickel

the north pole of one magnet is always attracted to the _____ pole of another magnet

south

the north pole of one magnet is ________ to the north pole of another magnet

repelled

True or False: an electric field is generated by rubbing objects against each other and transferring negatively charged electrons from one area to another

true

the force of an electric charge gets _____ as the rod gets closer

stronger

why did the iron fillings rearrange themselves?

because of the magnetic field created

a ___________ magnetic field is created by when more coils are added

stronger

how do magnets move other magnets?

by either repelling (same poles) or attracting (opposite poles) each other

why do magnets repel same poles and attract opposite?

opposite poles attract because their magnetic field lines connect, and the same poles repel because their magnetic field lines do not connect and push away from each other

to pull objects toward one another

attract

to change from one type to another

convert

a type of magnet in which the magnetic field is produced by an electric current

electromagnet

the ability to make things move or change

energy

a push or a pull that change the motion of an object

force

to separate or set apart

isolate

the energy that an object has because it is moving

kinetic energy

the space around a magnet in which magnetic forces can act on objects

magnetic field

a line that connects opposite magnetic poles and represents the strength and direction of the magnetic field

magnetic field line

one of the two opposite ends of a magnet

magnetic pole

an object, diagram, or computer program that helps us understand something by making it simpler or easier to see

model

the energy that is stored in an object or system

potential energy

to provide evidence that goes against a claim

refute

to push objects away from each other

repel

a set of interacting parts forming a complex whole

system

to move from one object to another or one place to another

transfer

something that can be changed and may be measured

variable

what happens when you place two magnets close together?

they either repel or attract depending on if they are opposite or same poles

an invisible area of force around a magnet

magnetic field

magnets have a magnetic _________ making them different from other metals

field

a magnetic field allows magnets to ______ certain metal objects

attract

pushing two north poles of magnets together is hard because only ______ poles stick together

opposite

when an electric _______ flows through a wire, it can create a magnetic field

current

what can weaken a magnetic field?

distance