Magnetic Forces
an object that attracts or pulls on materials that contain iron
magnet
An electromagnet is different that a bar magnet because (there are 3 reasons- give one)
turned on and off
strength can be changed
can have direction reversed (poles)
Electric charges are from ______________ and _______________________ (sweater and balloon lab)
protons, electrons
push or pull applied to an object
force
How many degrees are in a circle?
360
like poles _____
repel
More Wraps= ______________ magnetic field
stronger
force of attraction or repulsion between objects due to their charges
electric force
includes the speed and direction of and object
velocity
Which artist had a hit in 1999 with “No Scrubs”
TLC
Two materials other than iron that are magnetic are
cobalt , nickel
Electromagnets are extremely useful because they can be turned ______ and ______
on and off
opposite charges __________
attract
a force that can act at a distance
non contact force or force field
Which metal is found the most at the center of the Earth? (causing the Earth to be a magnet- also in your content connections)
iron
Strength of force between two magnets depends on
the distance between them
The magnetic field around around the wire of an electromagnet forms a ______________.
circle
accumulation of excess electric charges on an object (close out of a dryer causing a shock)
static electricity
the amount of matter in an object
mass
How many bones does a shark have?
The region where the magnet is the strongest is
magnetic pole
Give three examples of an electromagnet because they are common in our everyday life
earbuds, headphones, speakers, generators, MRIs, Electric motors, junkyard cranes, Ms. Baker's door
Electric forces increase as the _____ of the charge increases.
magnitude or amount
The acceleration of an object depends on the mass of the object and the amount of force applied is (what Law is this)
Newton's Second Law
When you mix all the colors of light, what color do you get?
white