Erosion: Shaping the LandscapeActivities & Teaching Strategies
Active learning transforms abstract earth science concepts into tangible experiences. By modeling erosion with water, wind, and ice, students connect textbook definitions to real processes shaping Ontario’s landscape, building lasting understanding through observation and measurement.
Learning Objectives
- 1Analyze the distinct landforms created by water, wind, and ice erosion in various Canadian landscapes.
- 2Compare the effectiveness of vegetation in preventing soil erosion versus engineered solutions for coastal erosion.
- 3Design a mitigation strategy to reduce the impact of coastal erosion on a specific Ontario shoreline.
- 4Explain the role of natural erosion processes in shaping physical patterns within a changing world.
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Stream Table Lab: River Erosion
Provide trays filled with layered sand and soil. Students adjust water flow rates and slopes to simulate rivers, adding sticks as vegetation. Measure gully depth and sediment moved after 10 minutes, then discuss variables.
Prepare & details
Analyze how natural processes of erosion conflict with human land use.
Facilitation Tip: During the Stream Table Lab, circulate to ensure groups adjust slope and flow rates incrementally, recording observations every two minutes to capture cumulative change.
Setup: Varies; may include outdoor space, lab, or community setting
Materials: Experience setup materials, Reflection journal with prompts, Observation worksheet, Connection-to-content framework
Wind Tunnel Demo: Dune Building
Use hair dryers or fans over sand trays with barriers like pebbles. Students vary wind speed and surface cover, sketching dune shapes before and after. Compare results to photos of Canadian dunes.
Prepare & details
Explain what role vegetation plays in preventing soil degradation.
Facilitation Tip: In the Wind Tunnel Demo, place a ruler along the tunnel’s side to help students measure dune height growth after each 30-second interval of wind exposure.
Setup: Varies; may include outdoor space, lab, or community setting
Materials: Experience setup materials, Reflection journal with prompts, Observation worksheet, Connection-to-content framework
Glacier Push Model: Ice Action
Freeze soil-sand mixtures into ice blocks. Students push them over clay landscapes, noting U-shaped valleys formed. Rotate blocks and record changes every 5 minutes for group comparison.
Prepare & details
Design strategies for humans to mitigate the impact of coastal erosion.
Facilitation Tip: For the Glacier Push Model, use a ruler to track the farthest advance of the ice block every minute, ensuring students record both distance and time for rate calculations.
Setup: Varies; may include outdoor space, lab, or community setting
Materials: Experience setup materials, Reflection journal with prompts, Observation worksheet, Connection-to-content framework
Design Challenge: Coastal Protection
Give groups model beaches with waves from trays. They test barriers, plants, or rocks, then redesign based on erosion rates. Present strategies linking to Ontario shorelines.
Prepare & details
Analyze how natural processes of erosion conflict with human land use.
Setup: Varies; may include outdoor space, lab, or community setting
Materials: Experience setup materials, Reflection journal with prompts, Observation worksheet, Connection-to-content framework
Teaching This Topic
Teachers should balance hands-on modeling with structured questioning to guide students from observation to explanation. Avoid over-explaining processes; instead, let students articulate patterns from their data. Research shows that students grasp erosion best when they connect small-scale models to real-world examples in their local environment.
What to Expect
Students will demonstrate mastery by explaining how agents of erosion create landforms, using evidence from models to compare rates and patterns. They will also evaluate human impacts on erosion and propose solutions grounded in their observations of natural systems.
These activities are a starting point. A full mission is the experience.
- Complete facilitation script with teacher dialogue
- Printable student materials, ready for class
- Differentiation strategies for every learner
Watch Out for These Misconceptions
Common MisconceptionDuring the Stream Table Lab, students may assume erosion only happens when water flows rapidly or overflows the tray.
What to Teach Instead
Use the stream table to measure sediment movement during steady, low-flow conditions first, then gradually increase flow to show how cumulative small changes create visible erosion over time.
Common MisconceptionDuring the Wind Tunnel Demo, students may believe wind erosion only happens in deserts or during storms.
What to Teach Instead
Have students run the tunnel at consistent, moderate wind speeds for several trials, then measure the gradual buildup of dunes to show how wind sculpts landscapes continuously.
Common MisconceptionDuring the Glacier Push Model, students may think glaciers only cause erosion when they advance quickly, like in videos.
What to Teach Instead
Use the model to demonstrate how even slow ice movement polishes rock surfaces over time, and have students examine the base of the ice block for scratches after each trial.
Assessment Ideas
After the Wind Tunnel Demo, provide images of a sand dune, a river valley, and a glacial moraine. Ask students to identify the primary erosional agent for each and write one sentence explaining how it formed the landform.
During the Stream Table Lab, present students with a scenario: 'A farmer clears trees from a hillside to plant crops.' Ask them to write two sentences explaining how this increases soil erosion and one sentence describing how planting grass along the bottom of the hill could help prevent it.
After the Glacier Push Model, facilitate a class discussion using the prompt: 'Imagine a popular beach is experiencing rapid shoreline retreat. What are two conflicting interests that might arise between protecting the beach and allowing natural erosion processes to continue?'
Extensions & Scaffolding
- Challenge students to design a second stream table trial that tests how adding rocks or vegetation alters erosion rates, then compare results to their first trial.
- For struggling learners, provide pre-labeled diagrams of the stream table or wind tunnel to guide data collection and interpretation.
- Deeper exploration: Have students research how Indigenous communities in Ontario observe and adapt to erosion processes along waterways, then present findings to the class.
Key Vocabulary
| Abrasion | The process where rocks and sediment carried by wind, water, or ice grind against and wear away other rocks and surfaces. |
| Deposition | The geological process in which sediments, soil, and rocks are added to a landform or landmass, often occurring after erosion. |
| Glacial Till | Unsorted rock material deposited directly by a glacier, often creating hummocky terrain or moraines. |
| Shoreline Retreat | The process by which the edge of a coastline moves landward due to erosion, often caused by wave action and rising water levels. |
Suggested Methodologies
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