Wind Erosion: Shifting Sands

Active learning works for this topic because students need to see and feel how wind moves different sediments in real time. Watching dust lift, sand bounce, and pebbles roll makes abstract processes concrete, helping students remember and apply concepts accurately.

• Year 4
• Science
• 4 activities
• 30 min–45 min

Learning Objectives

1. Explain how wind speed and sediment size influence the processes of suspension, saltation, and surface creep.
2. Evaluate the role of vegetation in preventing wind erosion by comparing vegetated and non-vegetated landscapes.
3. Design and construct a model that demonstrates the formation of a specific sand dune type, such as a barchan dune.
4. Analyze the impact of human activities, like land clearing, on the rate of wind erosion in Australian environments.

Stations Rotation

⏱ 45 min·Small Groups

Stations Rotation: Sediment Transport Stations

Prepare four stations with fans at varying speeds and trays of clay, sand, and gravel. Students predict and test how far each sediment moves, measure distances, and record in journals. Rotate groups every 10 minutes to compare results.

Prepare & details

Explain how wind transports different sizes of sediment.

Facilitation Tip: During the Sediment Transport Stations, circulate with a decibel meter to ensure all fans run consistently so students compare wind speeds fairly.

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·Pairs

Pairs: Dune Formation Model

Partners layer dry sand in a tray, direct a fan to blow across it, and observe dune shapes forming. Add sticks as vegetation and note changes in erosion patterns. Sketch before-and-after diagrams.

Prepare & details

Evaluate the effectiveness of vegetation in preventing wind erosion.

Facilitation Tip: While students build their Dune Formation Model, ask guiding questions like, 'Where does the sand pile up first?' to focus their observations on slope formation.

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·Small Groups

Small Groups: Vegetation Barrier Test

Groups build wind barriers using grass clippings or sticks in sand trays, then apply fan wind. Measure eroded sand volume with and without barriers. Discuss why vegetation works.

Prepare & details

Design a model to demonstrate the formation of sand dunes.

Facilitation Tip: For the Vegetation Barrier Test, have students predict outcomes before testing so they notice discrepancies between expectation and result.

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·Whole Class

Whole Class: Erosion Mapping Walk

Lead a schoolyard or nearby park walk to identify wind-eroded spots like bare soil patches. Class sketches a map, hypothesizes causes, and proposes prevention ideas like planting.

Prepare & details

Explain how wind transports different sizes of sediment.

Facilitation Tip: During the Erosion Mapping Walk, bring a simple anemometer to measure wind speed at different spots so students connect data to landscape changes.

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 repeated observation and measurement when teaching wind erosion. Avoid relying solely on diagrams or videos, as students need tactile experiences to grasp how particle size and wind speed interact. Research shows that hands-on model building and data collection deepen understanding, especially in arid and coastal contexts where wind is a dominant force.

What to Expect

Successful learning looks like students correctly identifying sediment transport processes, explaining how wind shapes landforms, and justifying why vegetation matters in erosion control. They should use evidence from their models and observations to support their ideas.

Watch Out for These Misconceptions

Common Misconception

During Sediment Transport Stations, watch for students who assume a single fan speed moves all particle sizes the same way.

What to Teach Instead

Use the station’s variable-speed fan to show how fine dust lifts at lower speeds while pebbles only move at high speeds, and have students record thresholds in a shared table.

Common Misconception

During Vegetation Barrier Test, watch for students who think plants only block wind without trapping sediment.

What to Teach Instead

Ask students to measure sediment build-up behind barriers and compare to bare sand trays, using photos to document changes over time.

Common Misconception

During Dune Formation Model, watch for students who believe dunes stay fixed in place.

What to Teach Instead

Use a time-lapse video function on a tablet to capture dune movement over 10 minutes, then have students trace dune positions to visualize migration.

Assessment Ideas

Exit Ticket

After Sediment Transport Stations, provide students with three scenarios (strong wind over dusty field, moderate wind over sand, light breeze over grass) and ask them to identify the dominant transport process and explain their choice using evidence from the activity.

Quick Check

During Erosion Mapping Walk, ask students to sketch one landform they observe and label the wind processes creating it, then share with a partner to compare explanations.

Discussion Prompt

After Vegetation Barrier Test, pose the question, 'How would your results change if the vegetation was taller or denser?' and facilitate a class discussion about design trade-offs in windbreaks.

Extensions & Scaffolding

• Challenge: Ask students to design a windbreak using only natural materials and test its effectiveness by measuring how far sand travels in a tray.
• Scaffolding: Provide pre-labeled sediment trays for the Sediment Transport Stations so students focus on observing movement rather than setup.
• Deeper exploration: Have students research how Indigenous Australian practices, like fire management, influence wind erosion in desert regions and present their findings.

Key Vocabulary

Erosion	The process by which natural forces, like wind or water, wear away rocks and soil.
Sediment	Small, solid pieces of material that have been broken down from rocks or minerals, such as sand, silt, and clay.
Suspension	The process where very fine sediment particles, like dust, are lifted and carried long distances by the wind.
Saltation	The bouncing or hopping movement of sand grains along the ground surface as they are transported by the wind.
Surface Creep	The rolling or sliding of larger sediment particles along the ground surface, pushed by the wind or by other moving particles.
Sand Dune	A hill or ridge of sand built up by the action of wind, often found in deserts and coastal areas.