Chapter 16 Notes: Electricity
Integrated Science I
Name: __________________________
Date: _____________
Block: _____
 Connection to previous knowledge: Parts of an atom that make electricity possible:
 Electrical conductors – a ________________ that _____________ electrons to flow
easily through it
o Ex) __________, ____________, ______________, etc.
 Electrical insulators – a _________________ that __________________ electrons to
flow easily through it
o Ex) ______________, __________________, _______________, etc.
 A complete _________________________ is needed for an electrical
circuit to work correctly. There are 2 types of circuits:
o 1. ___________________ - each device is
placed in its own __________________________
o 2. ___________________ - a device placed in a
____________________________
 What Exactly is a Circuit?
o An electrical circuit is a _________ in which ______________ from
a _______________ or current source flow
 Voltage or current source could be a ______________
 Flow freely in ____________________
 Do not flow freely in ____________________
o Electric current flows in a ________________________ called an
electric circuit and only flows in ______________________
 Examples of Circuits
o ______________________ are wired in __________________
o Why?
 ________________ power source supplying all lights and appliances with
the same voltage
 If one of the lights burns out, _________________ can still flow through
the rest of the house
o _________________________________ are typically wired in series
 This is why your whole strand goes out
 What kind of circuits are the following?
_______________
________________
 Circuit Protection
o For protection, household circuits contain:
 Circuit Breakers
 Contains a _____________________________ when it gets _____
 Fuses
 Contains a _________________________ that __________ if the
current becomes too ___________
 When it melts, it causes a __________ in the circuit, stopping the
flow of ___________________
 To fix, you must _______________ the blown fuse with a new one
 Electric Current
o Electric Current – is the _________ at which positive charge flows in a circuit
 It measures how ________ the ______________ are ____________ in
the circuit
 Flows from ___________ to _____________ (Think of it like ________
_________________)
 Measured in _________________ (___)
 Equals 1 coulomb of charge per second (C/s)
 Electrical Resistors
o A resistor ________________ the rate of charge flow in a circuit
o They are _______________________________________!
 Ex) _________________, ________________, ANYTHING that takes
electricity to run
o Resistance is a measure of “________________” it is to “_________”
____________________ through a circuit
o Unit of resistance is the __________ (____)
o If we ______________ the resistance, the voltage goes __________
 Because __________________ cannot flow as easily
o If we ______________ the resistance, the voltage goes _________
 Because _________________ can flow easily
o __________________ are _______________________ and _______________
are ________________________ in circuits
 Electrical Power
o *Electrical Power – _________________________________________________
o SI Unit: _____________ (____)
o Term for 1,000 units = _________________ (____)
In this example,
electrical power is
converted to light
energy in the light
bulb. The light bulb
acts as a resistor
 Brainstorm: What do you think causes the electrons to move?
o A _____________________ that separates ____________ and _____________
sides of the battery
o The separation is what causes the _______________ to _______ in the circuit
o Electrons then _______________________ to other objects and transform
electrical energy into other forms:
 ____________
 ____________
 ____________
o Current continues to ______, even after the electrons transfer their energy
 Voltage
o V = _______
o Definition: The SI unit of electromagnetic force,
the _______________________ that would
drive one ampere of ____________ against one
ohm _____________
o Voltage is also known as
____________________________
o Measured with a ______________________
o The voltage difference between the two holes
in a wall socket is typically _____ ___________
 Q&A
o Q: If electrons are never “used up” in a circuit,
why do batteries go dead?
o A: Batteries go dead because the _____________________________________
________________________________________________________________
o Q: Do batteries supply all of the electrons in a circuit?
o A: ____! Electrons are in _________________________________. The battery
provides the “_________” for the electrons
 In Summary…
o Important SI Units:
 Current = _____________________ (___)
 Voltage = _____________________ (___)
 Resistance = ___________________ (___)
o Types of Circuits:
 Series = _______________________ Parallel = ______________________
o Power source supplies the electrons in the circuit:
 ____________________________________________________________
____________________________________________________________
o Relationship between current, resistance, and voltage:
 If we ________________ the _______________, the ______________
goes __________
 If we ________________ the _______________, the ______________
goes __________