Vocabulary
Give the definition for attract.
to pull together
What is a current
continuous flow of electrons
what is an electron
What is the buildup of electrical charges on a surface produced by contact and separation of dissimilar materials called?
static electricity
What is a switch? (HINT: NOT THE NINTENDO KIND)
A device that can open or close an electric circuit
what is a magnetic field
the invisible field that carries magnetic force to other objects
what is thermal energy
heat energy caused by moving particles.
what does repel mean?
to push apart
What is a measure of how well a given material will conduct electricity called?
Resistance
Good conductors have little resistance. Light bulbs have a higher resistance. Insulators have a very high resistance.
what is resistance?
a measure of how well given material will conduct electricity. Good conductors have little resistance. Light bulbs have a higher resistance. Insulators have a very high resistance.
Anything that slows something down
what is an electromagnet
a magnet produced by an electric current, usually a core of iron wrapped in a conductor.
what is a dry cell?
a battery that changes chemical energy into electrical energy.
what is a circuit?
an unbroken path of an electrical conductor that allows electrical current to flow from the power source and back again.
what is a closed circuit?
a circuit with no breaks or interruptions
what is a material that permits electric charge called?
a conductor
what is material that does not permit electric charge to pass through it easily called?
an insulator
what is a magnet
a device that attracts other magnets, iron containing materials, and other metals such as nickel.
what is an open circuit?
a circuit with a break in it
what is radiant energy
energy obtained from light sources such as the sun or laser beams
what is electrical energy
energy related to the movement of charged particles; electrical energy comes from batteries and power plants
what is electricity
anything involving electric charges, but usually refers to static, direct current, and alternating current electricity
energy of motion; (ex: wind, water in a waterfall, and a jet plane speeding through the air have mechanical energy; sound is a form of mechanical energy)
Good conductors have little resistance or high resistance?
little resistance
energy sent out in the form of electromagnetic waves, heat, light, and radio waves
radiant energy
true or false: a magnet only repels things.
False it attracts and repels!