Page 251 - The Ontario Curriculum, Grades 11 and 12: Science, 2008 (revised)

e2.5 analyse changes in household energy consump- tion over a given time period (e.g., throughout the course of a day; between a week in January and a week in May), and give reasons for the changes [AI, C]
E. Understanding Basic Concepts
By the end of this course, students will:
e3.1 describe basic electric circuit components, in- cluding those that regulate the flow of electricity or are used as safety mechanisms (e.g., switches, bimetallic strips, resistors, ground fault inter- rupters [GFIs], surge protectors), and explain their layout in an electric circuit
e3.2 describe forms of energy (e.g., electrical, mechanical, sound, light, thermal) and the energy transformations that occur in common electrical devices, including production of waste energy (e.g., heat)
e3.3 identify situations in which direct current (DC) and alternating current (AC) are used (e.g., DC is used in a portable appliance such as a flashlight; AC is used in a household appliance such as a kettle)
e3.4 explainthedifferenceinvoltagerequirements, and identify some household appliances that require 110 V AC (e.g., microwave oven, blender) and some that require 220 V AC to operate (e.g., conventional oven, clothes dryer)
e3.5 describe safety procedures to be followed when using electric systems at home or at work (e.g., ensuring that tools and appliances are properly grounded; unplugging appliances by pulling the plug, not the cord), and explain how dangerous situations can occur (e.g., an overloaded circuit can overheat and cause a fire; digging through buried electrical cable can cause a severe shock)
ELECTRICITy AT HOME AND WORK
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Science
SNC4E