energy Flashcards
battery
a device that stores chemical energy and converts it to electrical energy
energy
the ability to do work
watt
unit of power measuring electric flow
electricity
form of energy resulting from the existence of charged particles
joule
measuring of capacity to do work or heat
conductor
allow electrons to move through them more easily. The best conductors are metals.
current
current is the rate of flow of negative chargers in an electric current.
alternating current
the value of the quantity and direction of the current is not constant; it changes at a regular interval
direct current
the electric current that flows consistently in one direction
semiconductor
it conducts some bad and others good
transformers
a device that transfers electric energy from one current to the other
ions
an atom or molecule with a net electric charge
electrode
good conductors of electricity that are usually connecting nonmetals.
catalyst
a substance that changes the rate of a chemical reaction
power
the rate at which energy is transferred by an electric circut
Ohm’s Law
volts = resistance x current
parallel circuits
multiple pathways for the branches of electricity to flow
voltage
a pressure from an electrical circuit power source that pushes charged electrons
series circuit
only one path for the electric current to follow
energy transformation
the change of energy from one form to another
resistance
the measure of how difficult it is for electrons to floe through material
insulator
a material in which electrons cannot move from place to place
what is the difference between a series circuit and a parallel circuit?
In a series circuit, the components are connected in a line, and the same current flows through all of them. In a parallel circuit, the components are connected so that each has its own separate branch, and the same voltage is applied to each component.
for series circuit is where there is only one path for electricity to flow
parallel circuits and multiple paths
what is the difference between endothermic and exothermic?
Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products. An exothermic reaction is when energy is released in the form of light or heat. The energy is absorbed from the surroundings into the reaction.
endothermic absorbs heat, exothermic releases heat
kinetic energy
the energy an object has because of it’s motion
electric current
a steady flow of electrons through a conductor measured in units of ampers
Law of Conservation of Energy
energy cannot be created nor destroyed only changed in form
Potential energy
the energy that comes from position or condition
circuit
a circuit is a closed path through which an electric current can flow
