Unit: Electricity
Central Concept- Coulomb’s law provide the mathematical models to describe and predict the effects of electrostatic forces between distant objects. Fields in space that can transfer energy through space explain forces at a distance. Magnets or changing electric fields cause magnetic fields; electric charges or changing magnetic fields cause electric fields. Attraction and repulsion between electric charges at the atomic scale explain the structure, properties, and transformations of matter, as well as the contact forces between material objects.
Central Concept-Definition of Energy: "electrical energy" may mean energy stored in a battery or energy transmitted by electric currents.
Central Concept-Conservation of Energy: energy can be transferred from place to place by electric currents.
Science and Engineering Practices-Analyzing and interpreting data: After data has been collected, it must be analyzed in order to derive meaning. This allows scientists and engineers to identify significant features and patterns in the data, which can lead to drawing conclusions and possible solutions.
Learning Objectives:
By the end of this unit, you should be able to.... (Those in bold will be essential & will be assessed formally in the curriculum)
1.
|
Recognize that an electric charge tends to be static on insulators and can move on and in conductors, and explain that energy can produce a separation of charges.
|
2.
|
Explain the charge model (mobile electrons and fixed positive ions; conservation of charge), and recall the unit of charge (Coulomb).
|
3.
|
Explain triboelectric charging, charging by conduction, and grounding by applying the charge model. Relate the charges on one object to the charges on another object used to charge it.
|
4.
|
Describe polarization in terms of the charge model, and how polarization starts.
|
5. |
Describe conceptually the attractive or repulsive forces between objects relative to their charges and the distance between them (Coulombs Law)
|
6. |
For a pair of point charges, describe the direction of the electric forces they exert on each other, and relate the strength of the force to the amount of charge and the separation of the objects (Coulombs Law)
|
7. |
Sketch electric fields around simple arrangements of charges, and predict the behavior of test particles in an electric field.
|
8. |
Describe how a charged object will do work on an electron moving near it.
|
9. |
Develop a qualitative and quantitative understanding of current, voltage, resistance, and the connection between them (Ohm's Law). |
10. |
Analyze simple arrangements of electrical components in both series and parallel circuits. recognize symbols and understand the functions of common circuit element (battery, connecting wire, switch, fuse, and resistance) in a schematic diagram.
|
11. |
Explain how electric current is a flow of charge caused by a potential difference (voltage) and how power is equal to current muleiplie by voltage.
|
12. |
Connect a battery, wire, and bulb so that the bulb lights up. Explain the functioning of such circuit. |
13. |
Identify and analyze simple, series and parallel circuits, using schematic diagrams |
Vocabulary:
charge |
static
|
insulators
|
conductors
|
attraction
|
repulsion
|
conduction
|
charge model (Conservation of Charge)
|
Coulomb
|
triboelectric charging
|
grounding
|
polarization |
induction |
source |
load |
wire |
AC |
DC |
current |
voltage |
resistance |
power |
Ampere |
Ohms |
Watts |
simple circuit |
series circuit |
parallel circuit |
complex circuit |
schematic diagram (circuit diagram) |
short circuit |
iterative process |
design |
modeling |
system
|
Worksheets/Labs/Handouts:
Static Electricity
Current Electricity
Supplement Material:
http://phet.colorado.edu/simulations/sims.php?sim=Electric_Field_Hockey
(play the Electric Field Hockey Game!!!)
Electricity Interactive Games
More Games
How Stuff Works-Electricity
Overview of Electricity/Quiz
History of Electricity
Discovery Videos about Electricity
NASA-Electricity in Weather
Extra Worksheets to Practice:
Home Page
Comments (0)
You don't have permission to comment on this page.