Name
_______________________
Period _____ Date_____________
1. The
E-Learning Zone: Use this site to
answer the questions or complete the activities. Click on the topics to see the information
for each section. http://www.cornwallis.kent.sch.uk/intranet/elearn/science/elecmag/1elec_index.html
Electric
Charges:
Give
something electrons = Makes it ___________________ charged.
Take
away electrons = Makes it ____________________ charged.
Like
charges ___________________. Unlike
charges __________________.
Batteries and
Circuits:
Draw
the symbols for the following:
|
Cell
|
Wire
|
Switch |
Bulb |
Ammeter |
Voltmeter |
|
|
|
|
|
|
|
Series and
Parallel Circuits:
Series
-Two bulbs in series will be dimmer than ________ __________ on its own.
Why?
If
one bulb was to blow, then the circuit would __________________________.
Parallel
– Two bulbs in parallel will still ___________
__________________.
Why?
If
one bulb blows, what happens? Why?
Resistance:
The
unit of resistance is the ohm, and its symbol is: ______
Thicker
wire = ____________ resistance.
Thinner
wire = ____________ resistance.
Shorter
wire = ____________ resistance.
Longer
wire = ____________ resistance.
The
heating elements in many home appliances have very high resistance. What type of material is the heating element
of a toaster made of?___________________
Electrical
Energy:
Electrical
appliances usually have a power marked on them, this is given in ___________ or
kilowatts. A kilowatt is __________
Watts.
The
electrical energy used by the device depends upon two things:
_________________________
and ______________________________________
How
much energy does a 4 kW heater use for 5 hours?______________kW
h
2. How Stuff Works: Why are my power bills so
high?
If
a kilowatt-hour of electricity costs $.10, how much does it cost to run a
refrigerator for one hour? $_________ two hours?$__________24 hours $________
http://www.howstuffworks.com/question272.htm
3. Electric Circuits:
This
is a very simple site to explore. Click
on the links and make the circuits.
http://www.geocities.com/thesciencefiles/electric/circuits.html
4. The Blobz Guide to
Electric Circuits:
A
simple but effective way to learn the symbols for electric circuits. Do the activity and the quiz.
http://www.andythelwell.com/blobz/
5. Make an Electric Circuit Online:
Follow
the directions and make an online circuit.
Reread the directions. Be sure to
click on the circuit to add a component.
http://gwydir.demon.co.uk/jo/elect/
6. Molecular Expressions: Electricity &
Magnetism Introduction: Ohm’s Law
Ohm’s
Law: The current in a circuit is ____________________ proportional to the
applied voltage and __________________ proportional to the ____________________
of the circuit.
Click
on the resistance slider to change resistors.
Click
on the voltage slider to adjust voltage of the variable power supply.
http://micro.magnet.fsu.edu/electromag/java/ohmslaw/
7. Virtual Laboratory: Voltage Circuit Simulator
Read
the directions and experiment with the online circuit to see the relationship
between voltage, amperage, and resistance, __________ Law. You may need to reread the directions.
http://jersey.uoregon.edu/vlab/Voltage/
8. Ohm Zone:
Read
the directions to build and test circuits. Click on the ? to see the help pop-ups. Use the hand to see how the program
works to build different types of circuits.
After you have built the circuit, click on the visualize button.
http://www.article19.com/shockwave/oz.htm
9. Power House:
You
can find how much electrical energy is used by household appliances. Click on
the ? to see the help pop-ups. Use
the hand to view the demonstrations to help you get started.