Scientific Inquiry and the Natural World · 5th Class

Active learning ideas

Erosion and Deposition

Students grasp erosion and deposition best when they see these forces in action. Active simulations let them observe how wind, water, and ice reshape land in minutes, not millennia. By handling materials and adjusting variables, they build durable understandings that static images or lectures cannot provide.

• NCCA Curriculum Specifications
• NCCA: Primary - Materials
• NCCA: Primary - Properties and Characteristics

• 30–50 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Case Study Analysis
• 45 min · Small Groups

Stream Table Simulation: River Erosion

Provide trays with sand, soil, and rocks. Pour water from a height to simulate rivers, observing how it erodes banks and deposits sediment downstream. Students measure changes in landscape before and after, sketching results. Discuss velocity's role in transport.

Explain how wind, water, and ice contribute to erosion.

Facilitation Tip

During the Stream Table Simulation, circulate and ask each group to predict where the fastest erosion will occur before they turn on the water.

What to look for

Provide students with images of different landforms (e.g., a canyon, a sand dune, a river delta, a moraine). Ask them to write the name of the landform and identify whether it is primarily created by erosion or deposition, and name the agent (wind, water, or ice) responsible.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Activity 02

• Case Study Analysis
• 35 min · Pairs

Wind Erosion Stations: Dune Formation

Set up fans blowing over trays of dry sand with barriers. Groups add pebbles or moisten sand, then record how wind moves particles and forms dunes. Rotate stations and compare deposition patterns. Clean up and share findings.

Analyze the relationship between erosion and deposition in shaping landscapes.

Facilitation Tip

At the Wind Erosion Stations, set a timer so students rotate every three minutes; this keeps the focus on the effect of wind speed on sand movement.

What to look for

Pose the question: 'Imagine a new housing development is planned for a hillside area near a river. What are two potential problems related to erosion that might occur, and what are two specific actions the developers could take to reduce these problems?' Facilitate a class discussion where students share their predictions and proposed solutions.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Activity 03

• Case Study Analysis
• 50 min · Small Groups

Glacier Model: Ice Erosion

Freeze sand-water mixtures into ice blocks. Place on sloped wax paper trays; let melt under weight to mimic glaciers. Students track scratches and debris trails, measuring deposition piles. Predict outcomes with different loads.

Predict the long-term effects of human activities on erosion rates.

Facilitation Tip

When running the Glacier Model, have students mark the initial position of the ice block so they can measure how far it scrapes the tray during melting.

What to look for

During a hands-on activity simulating erosion with a water source and soil, ask students to observe and record: 'What happens to the soil when the water flows over it?' and 'Where does the soil end up?' This checks their understanding of the movement and settling of materials.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Activity 04

• Case Study Analysis
• 30 min · Whole Class

Whole Class Debate: Human Impacts

Show images of Irish eroded farmlands. Students vote on solutions like terracing, then debate in teams using evidence from prior activities. Vote again and summarize consensus.

Explain how wind, water, and ice contribute to erosion.

What to look for

Provide students with images of different landforms (e.g., a canyon, a sand dune, a river delta, a moraine). Ask them to write the name of the landform and identify whether it is primarily created by erosion or deposition, and name the agent (wind, water, or ice) responsible.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

A few notes on teaching this unit

Teachers should let students struggle slightly when making predictions before giving hints. Research shows this builds stronger conceptual models than immediate corrective feedback. Avoid telling them the answers; instead, pose questions like, 'Where do you think the heaviest sand grains will land?' Use hand lenses to let students examine the texture of deposited materials, reinforcing connections between particle size and transport.

By the end of these activities, students should accurately explain how different agents transport and deposit sediments. They will justify their claims with evidence from stream tables, wind stations, and glacier models. Clear oral and written explanations show they can connect processes to landforms and human impacts.

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Watch Out for These Misconceptions

• During the Stream Table Simulation, watch for students who assume water is the only agent of erosion. Redirect them by asking, 'How might this river behave differently if wind or ice were acting here?'

  After the Stream Table Simulation, ask groups to compare their river’s behavior with the wind and glacier stations. Use a Venn diagram on the board to highlight which landforms each agent creates, forcing them to articulate differences.

• During the Wind Erosion Stations, watch for students who believe deposition only happens far from erosion sites. Redirect them by asking, 'Why did some sand settle right at the edge of your dune?'

  After the Wind Erosion Stations, have students measure the distance from the fan where the first grains settled. This quantitative data helps them see that deposition occurs immediately after transport ends.

• During the Glacier Model activity, watch for students who think changes happen too slowly to matter. Redirect them by asking, 'What minor changes did you observe in just ten minutes?'

  After the Glacier Model activity, ask students to create a timeline showing the short-term changes they observed (scratches, displaced soil) and compare it to images of real moraines formed over centuries.

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Methods used in this brief

• Case Study Analysis