Unit Overview, "Electricity "

This material is developed for students with special needs integrated into a heterogeneous academic class . The material is designed to compliment and adapt the use of the text, "Science +3", for these students


Sc +


Unit Sections

(Concept development)





Sources of Electric Current












Making electricity in the real world


1.0 Electric energy can be produced from the following:

1.10 Chemical Energy in Cells

.12 Electricity from a dry cell

.13 Your Turn at a Dry Cell

.14 Electricity From a Wet Cell

1.20 Light Energy in Solar Cells

1.30 Magnet and a Coil of Wire

1.40 Heat in a Thermcouple

1.50 Magic Square

.51 Version-1

.52 Version-2

1.60 Electric energy in the real world comes from the following:

.61 Dry cells

.62 Cell Summary

.63A Comparing 12V Batterries

.63B"Makita", NiCad Advert.

.64 Generators


.64B-Variables affecting quantity of current generated

.64C-Construction of a dynamo



























Trail Blazing for electricity





2.10 Trail Blazing (Identifying significant variables affecting electric current)

.11 Kind of Material

.12 Length of Path

.13 Width of the Path

.14 Path Temperature

2.20 Electric Energy Conversion














Path Finders


3.0 It's All in The Connections

3.10 Simple minimum requirements for a working electric circuit are as follows:

- a source of electric energy

- a complete conducting path

- an appliance (electric energy converter)

3.20 Two useful path connections:

.21Single path

.22Multiple path

.23 Mystery paths

A) Tracing Mystery Paths

B)Tracing Mystery Paths in the Real World

3.30 Single path, simple unbranched circuits

(series, one path )

.31 Increasing the number of cells increases the current strength

.32 Increasing the lamps weakens the current

.33 One break shuts it off

.34 Usefulness/application

.35 A/B (Cryptogram/Fix It

3.40 Branched paths

( parallel, alternate path)

.41 adding branches does not weaken the current in each branch

.42 adding branches increase the current in the whole circuit

.43 a break shuts it off only part of the circuit

. 44A Current Comparisons

series / parallel .

.44B Brightness (current) Quiz

. 45 usefulness/application

.45A) Perplexing Puzzles

- Julie & Jennifer's Puzzle

-Jeff's Puzzle

-Tom's Puzzle

- Mr. Carson's Puzzle

.45B Cryptogram Summary

.45C Advantage of Parallel Circuits

3.50 Overloaded Circuits

.51A/B The long and "short" of circuits

.51C Octopus Connection

.51D Disadvantages of Parallel Circuits

.51E Managing a Safety Problem


















































4. Electricity and Magnets














Magnets and electricity


4.0 A current in a wire makes an electromagnet

4.10 The strength of an electromagnet

.11 increasing the number of coils

.12 putting an iron core in the magnet

.13 increasing the current

4.20 Electromagnets are used in the following

.21 electric bells.

.22 buzzers

.23 motors

.30 Magnets produce electricity in a coil of wire when they are moved (see generators 1n 1.23 above)


















5. Circuits at Home


5.0 Circuit connections at home

5.10 Kinds of Circuits at Home

.11Circuit Materials


5.20 Plugged In To Safety

.21 Puzzle-1

.22 Puzzle-2

.23 Puzzle-3











6. Electrical Energy


6.0 Save-cents

6.10 Electric Energy Conversion

6.20 Cost of Appliance Operation

.21 Version -1

.22 Version -2

.23 Energuide labels

6.30 Your Electric Bill

.31The Meter

.32 Meter Reading

.33 Cost Read From the Meter

.34 Word Search
















When Electrical Energy Became of Age (History)


7.1 Stienmetz, Electrical Genius comes to N.A.

7.2 The Men Who Lit Our Cities

7.2 Energy Comes to Rural N.S., "Hot Potatoes In Your Boots"