History & Geography · Grade 7 · Natural Resources: Use and Sustainability · Term 3

Hydro-electricity and Fossil Fuels

Compare hydro-electricity and fossil fuels as primary energy sources for Canada, considering their advantages and disadvantages.

• Ontario Curriculum Expectations
• ON: Natural Resources around the World: Use and Sustainability - Grade 7

About This Topic

Students compare hydro-electricity and fossil fuels as Canada's main energy sources. Hydro-electricity uses dams on rivers to generate power from water flow, which explains its dominance in Quebec and Ontario where geography supports large-scale projects. Fossil fuels, such as coal, oil, and natural gas from Alberta's oil sands, offer steady supply but involve extraction and combustion processes.

This fits Ontario's Grade 7 curriculum on natural resources, use, and sustainability. Students examine hydro's prevalence through provincial maps and data, contrast environmental effects like river ecosystem changes from dams with fossil fuel emissions causing air pollution and climate change, and assess economic factors including oil sands jobs versus long-term cleanup costs.

Active learning works well for this topic. Students participate in structured debates or data graphing to weigh trade-offs firsthand. These approaches build analytical skills, link concepts to Canadian contexts, and make complex sustainability issues relatable and memorable.

Key Questions

1. Analyze the reasons for hydro-electricity's prevalence in Quebec and Ontario.
2. Differentiate the environmental impacts of hydro-electricity from fossil fuel combustion.
3. Evaluate the economic and environmental trade-offs of relying on the Alberta oil sands.

Learning Objectives

• Compare the environmental advantages and disadvantages of hydro-electricity and fossil fuels as primary energy sources in Canada.
• Analyze the geographical factors contributing to the prevalence of hydro-electricity in Quebec and Ontario.
• Evaluate the economic and environmental trade-offs associated with the extraction and use of fossil fuels, specifically from the Alberta oil sands.
• Differentiate the specific environmental impacts of hydro-electric dams on river ecosystems from those of fossil fuel combustion on air quality and climate.

Before You Start

Canada's Diverse Geography

Why: Understanding major Canadian landforms and water bodies is essential for grasping why hydro-electricity is geographically concentrated.

Introduction to Natural Resources

Why: Students need a foundational understanding of what natural resources are and how they are used before comparing specific energy resources.

Key Vocabulary

Hydro-electricity	Electricity generated from the energy of moving water, typically by using dams to control water flow through turbines.
Fossil Fuels	Natural fuels such as coal, oil, and natural gas, formed in the geological past from the remains of living organisms.
Oil Sands	Deposits of sand, clay, water, and bitumen (a heavy form of petroleum), requiring significant energy and water to extract oil.
Renewable Energy	Energy from sources that are naturally replenished on a human timescale, such as solar, wind, hydro, and geothermal.
Non-renewable Energy	Energy from sources that exist in finite quantities and are consumed much faster than they are formed, such as fossil fuels.

Watch Out for These Misconceptions

Common Misconception

Hydro-electricity causes no environmental harm.

What to Teach Instead

Dams flood habitats and block fish migration, altering ecosystems. Hands-on watershed models let students simulate flooding effects, helping them revise ideas through observation and group discussion.

Common Misconception

Fossil fuels power most of Canada's electricity everywhere.

What to Teach Instead

Provinces vary: hydro leads in Quebec and Ontario, while fossil fuels dominate elsewhere. Mapping activities reveal regional differences, prompting students to question assumptions with real data.

Common Misconception

Oil sands are not fossil fuels.

What to Teach Instead

Oil sands extract bitumen, a fossil fuel requiring energy-intensive processing. Case study jigsaws distribute research roles, so students piece together facts and correct each other collaboratively.

Active Learning Ideas

Debate Prep: Energy Source Pros and Cons

Assign small groups one energy source. Provide fact sheets on advantages and disadvantages. Groups prepare 3-minute arguments with evidence from Quebec hydro or Alberta oil sands. Present to class for rebuttals.

45 min·Small Groups

Data Stations: Provincial Energy Mix

Set up stations with charts on Canada's energy production by province. Groups rotate, graph hydro versus fossil fuel percentages, and note regional patterns. Discuss findings as a class.

40 min·Small Groups

Model Build: Dam vs Coal Plant

Pairs construct simple models using trays: one simulates a dam with water flow and turbine spin, the other a coal plant with 'smoke' from baking soda reactions. Compare outputs and impacts.

35 min·Pairs

Trade-Off Cards: Sort and Justify

Distribute cards listing economic, environmental, and social factors for each source. In pairs, sort into advantage or disadvantage piles and justify choices with examples from key provinces.

30 min·Pairs

Real-World Connections

• Engineers at Hydro-Québec design and maintain massive dam systems like the James Bay Project, which generates a significant portion of the province's electricity and influences local ecosystems.
• Geologists and environmental scientists in Alberta study the impact of oil sands extraction on land reclamation and water usage, working for companies and government agencies to mitigate environmental damage.
• Consumers in Ontario rely on electricity generated by both provincial hydro facilities and natural gas power plants, influencing their monthly energy bills and the province's carbon footprint.

Assessment Ideas

Discussion Prompt

Pose the question: 'If you were a policymaker in Canada, which energy source, hydro-electricity or fossil fuels, would you prioritize for future development and why?' Students should use specific examples of environmental and economic impacts discussed in class to support their arguments.

Quick Check

Provide students with a Venn diagram template. Ask them to fill it out comparing hydro-electricity and fossil fuels, listing unique advantages and disadvantages in the respective circles and shared characteristics in the overlapping section. Review for accuracy of points.

Exit Ticket

On an index card, have students write two sentences explaining why hydro-electricity is a major energy source in Quebec, and one sentence describing a potential environmental concern with the Alberta oil sands.

Frequently Asked Questions

Why is hydro-electricity so common in Quebec and Ontario?

These provinces have vast rivers and waterfalls ideal for dams, producing over 90% of their electricity from hydro. Students explore this through maps and timelines of projects like Niagara Falls, connecting geography to energy choices and Canada's export power.

What are the main environmental differences between hydro and fossil fuels?

Hydro disrupts local ecosystems via flooding and barriers but emits little during operation. Fossil fuels release CO2, smog, and toxins from combustion and extraction. Comparison charts help students quantify impacts, like greenhouse gases versus habitat loss, fostering balanced views.

How does active learning benefit teaching hydro-electricity and fossil fuels?

Activities like debates and models engage students directly with trade-offs, making abstract concepts tangible. Group data analysis on provincial energy reveals patterns, while role-plays simulate stakeholder views. This builds critical thinking, retention, and real-world application over passive lectures.

What economic trade-offs come with Alberta oil sands?

Oil sands create jobs and revenue but demand high investment for extraction and reclamation. Students evaluate GDP contributions against cleanup costs exceeding billions. Cost-benefit simulations clarify short-term gains versus long-term fiscal burdens on Canada.