Weathering and Erosion

Active learning helps students grasp weathering and erosion by making abstract processes visible and tangible. Hands-on stations and simulations let learners observe slow geological changes in minutes, building intuition about cause and effect.

• 6th Year
• Global Perspectives and Local Landscapes
• 4 activities
• 30 min–45 min

Learning Objectives

1. Compare the mechanisms of physical weathering, such as freeze-thaw and abrasion, with chemical weathering processes like carbonation and oxidation, citing specific examples.
2. Explain how agents of erosion, including water, wind, and ice, transport weathered rock material across different Irish landscapes.
3. Analyze the impact of specific weathering and erosion processes on distinct rock types, such as granite and limestone, found in Ireland.
4. Evaluate the role of water as an erosional agent in shaping features like river valleys and coastal cliffs, using local Irish examples.

Stations Rotation

⏱ 45 min·Small Groups

Stations Rotation: Weathering Processes

Prepare stations for physical weathering (freeze-thaw with ice cubes in rock cracks), chemical (vinegar on chalk and granite chips), biological (moss on stones), and control. Groups rotate every 10 minutes, measure mass loss or crack width, and sketch changes. Conclude with class share-out comparing rock responses.

Prepare & details

Compare the effects of physical and chemical weathering on different rock types.

Facilitation Tip: During the Station Rotation, circulate with a clipboard to listen for students using terms like ‘freeze-thaw’ or ‘carbonation’ when describing their observations.

Setup: Tables/desks arranged in 4-6 distinct stations around room

Materials: Station instruction cards, Different materials per station, Rotation timer

• Remember
• Understand
• Apply
• Analyze
• Self-Management
• Relationship Skills

Stations Rotation

⏱ 35 min·Pairs

River Erosion Demo: Stream Tables

Build stream tables with sand, soil, and rocks in trays. Pour water at varying speeds to simulate erosion and deposition. Students predict, observe sediment transport, and measure channel changes before and after. Discuss water as an agent.

Prepare & details

Explain how erosion transports weathered material across the landscape.

Facilitation Tip: For the Stream Tables, adjust the slope so water flows visibly but not too fast to obscure the erosion patterns students need to see.

Setup: Tables/desks arranged in 4-6 distinct stations around room

Materials: Station instruction cards, Different materials per station, Rotation timer

• Remember
• Understand
• Apply
• Analyze
• Self-Management
• Relationship Skills

Stations Rotation

⏱ 30 min·Small Groups

Wind Erosion Simulation: Sand Trays

Use hair dryers or fans to blow sand across trays with barriers like pebbles or vegetation. Students time transport distances and note deposition patterns. Rotate roles: observer, recorder, agent controller. Link to Irish coastal dunes.

Prepare & details

Analyze the role of water, wind, and ice as agents of erosion.

Facilitation Tip: In the Sand Trays, demonstrate how to vary wind speed with the fan before students experiment to ensure consistent comparisons.

Setup: Tables/desks arranged in 4-6 distinct stations around room

Materials: Station instruction cards, Different materials per station, Rotation timer

• Remember
• Understand
• Apply
• Analyze
• Self-Management
• Relationship Skills

Stations Rotation

⏱ 40 min·Pairs

Landscape Mapping: Local Features

Provide aerial photos or maps of Irish sites like Glencolumbkille. Students identify weathering/erosion evidence, label agents, and draw before-after sketches. Pairs present one feature to class.

Prepare & details

Compare the effects of physical and chemical weathering on different rock types.

Setup: Tables/desks arranged in 4-6 distinct stations around room

Materials: Station instruction cards, Different materials per station, Rotation timer

• Remember
• Understand
• Apply
• Analyze
• Self-Management
• Relationship Skills

Teaching This Topic

Teachers should emphasize the sequence: break first (weathering), then move (erosion). Use local examples to anchor abstract ideas. Avoid rushing through the vocabulary; give students time to touch, sketch, and discuss before formalizing definitions. Research shows that students retain concepts better when they connect them to familiar landscapes and repeat observations across different media.

What to Expect

Students will explain the difference between weathering and erosion, identify agents of each process, and link rock type to weathering rates. They will use evidence from models to justify their reasoning during discussions and written tasks.

Watch Out for These Misconceptions

Common Misconception

During the Station Rotation, watch for students using the terms weathering and erosion interchangeably when describing the same station.

What to Teach Instead

Pause the group at the first station and have them write two sentences: one describing how the rock broke in place, and another describing how material moved. Share these aloud before moving to the next station.

Common Misconception

During the Wind Erosion Simulation, watch for students assuming water is the only agent that erodes.

What to Teach Instead

Have pairs compare their sand tray results with a partner’s stream table results, noting which agent caused more change and why. Ask them to add a third column to their data table labeled ‘Other Agents’.

Common Misconception

During the River Erosion Demo, watch for students assuming all rocks weather at the same rate.

What to Teach Instead

Give each group two rock samples (limestone and granite) and ask them to predict which will change faster after five minutes in the stream table. Revisit predictions after the demo and discuss differences in rock composition.

Assessment Ideas

Quick Check

After the Station Rotation, display images of two landscapes and ask students to write which weathering process shaped each one and which erosional agent moved the material. Collect responses to check for accurate vocabulary and evidence-based reasoning.

Discussion Prompt

During the Landscape Mapping activity, ask students to work in groups and present one feature from their local map. Each group must explain the primary weathering process and erosional agent responsible, using evidence from their mapping and class discussions.

Exit Ticket

After the Stream Tables, provide a scenario: ‘A glacier moves through a valley with granite and shale. Describe how weathering and erosion will affect each rock type during transport.’ Students respond in writing and submit before leaving.

Extensions & Scaffolding

• Challenge: Ask students to design a miniature landscape in a tray that shows all four agents of erosion (water, wind, ice, gravity) and present it to the class with labeled explanations.
• Scaffolding: Provide sentence stems for students to use during the Station Rotation, such as “I see ______, which shows ______ weathering because ______.”
• Deeper exploration: Have students research how human activities like deforestation or quarrying affect weathering and erosion rates in a local context, then compare findings to their model results.

Key Vocabulary

Physical Weathering	The breakdown of rocks into smaller pieces without changing their chemical composition. Examples include freeze-thaw action and abrasion.
Chemical Weathering	The decomposition of rocks through chemical reactions, altering their mineral composition. Carbonation and oxidation are key processes.
Erosion	The process by which weathered rock material is moved from one place to another by natural agents like water, wind, or ice.
Carbonation	A type of chemical weathering where carbonic acid, formed when rainwater absorbs carbon dioxide, reacts with minerals, particularly in limestone.
Abrasion	A form of physical weathering where rocks are worn down by friction, often caused by particles carried by wind, water, or ice.