Study guide: magnets Flashcards
magnetic field
magnetic force exerted in the region around a magnet
permanent magnets
made from materials which retain their magnetic properties for a long time.
most common magnetic materials
metals
iron
cobalt
nickel
where is the magnetic field strongest?
the poles
static electricity
The buildup of electric charges on an object
static discharge
The escape of static electricity as charges move off an object
ex: shock felt when you rub your feet on the carpet and then touch a metal
doorknob.
friction
transfer of electrons from one object to another
ex: think of rubbing a (neutral) balloon against your (neutral) hair
induction
By inducing electrons to move from one object to the other.
ex: think of a (negative) ruler touching an (neutral) the ruler’s electrons travel to the rod
conduction
having two objects TOUCH each other and transfer electrons from one object to the next
ex: think of a (negative) balloon floating towards (neutral) metal. the electrons are repulsive and protons attracted to the balloon
If a bulb is missing or broken in a series circuit, will the other light bulbs light?
no, because there
is a break in the circuit and there is no complete path for the electric current to flow through
If a bulb is missing or broken in a parallel circuit, will the other light bulbs light?
yes, because the
electricity has other paths to flow through.
what is a virus
a non-living particle that can infect living things.
How do viruses multiply?
y injecting their genetic material into the cells of
organisms and taking over the host cells’ functions to manufacture more viruses.
solution: properties
A solute dissolved in a solvent;
particles will not settle to bottom
suspension: properties
Mixture with no solute and no solvent;
particles will settle to bottom
