**
It is expected that students will relate electrical energy to power consumption.**

**Students who have fully met the prescribed learning outcome are able to:**

Define electrical energy and power

Calculate the following:

- power—using voltage and current

- energy consumption—given the power rating of a device

and duration of use

**RESOURCES:**

BC Hydro: Energy Teaching Modules

One Day is the City of Vancouver's community engagement process in support of its Community Climate Change Action Plan.

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Review ways electricity is generated (dry cell,

static electric charges, thermocouples,

piezoelectric crystals, solar cells, and electric

generators). Show students a video on

hydroelectric generation as well as other

possible forms of electric energy generation

(solar, wind, geothermal, etc.). Alternatively,

set up stations for each of several generation

systems. Have students circulate through the

stations and complete reports in which they

identify for each system, as appropriate,

(wind) ( hydroelectric) (solar)

- the size of cells

- number of cells

- temperature difference

- size of magnet

- number of coils

- speed of rotation of coil or magnet

Have students draw diagrams and explain

how different devices generate electricity and

the factors that affect how much electricity is

generated. If a stations approach is used,

student reports can be assessed on accuracy

of observations and factors that affect current

and voltage generation.

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Remind students of the differences between

energy and power. Review definitions for

force, work, energy, power, voltage, current,

resistance, and the appropriate units for each.

• Define electrical energy and power using their

formulas. Demonstrate how to solve problems

using E = VIΔt and P = VI. Explain the use of

kW•h and J for energy and W, kW, and MW

for power. (Glossary)

• Ask students to observe their home energy

home energy consumption for a week, record the daily

readings, and determine the cost of their

electrical energy.

• Have students construct a concept map for all

the terms listed in the vocabulary for this

section.

Have students write definitions and solve

problems with respect to electrical energy and

power and duration of use. Verify that students

use appropriate units, including kilowatt,

megawatt and kilowatt-hour as well as the power

rating of devices. Award marks for proper use of

units and showing work, as well as obtaining

correct results. (Glossary)

• Assess the energy consumption records for

organization, completeness, as well as correct

calculations and use of appropriate units.

• To assess students’ concept maps, use the concept

map rubric provided at the end of the Classroom

Model for this grade.

**RESOURCES:**

EnerGuide Heating Cost Calculator

Appliances - EnerGuide Ratings

Interactive Energy Cost Calculator; much will it cost to operate your new appliance over the long term?

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