Science · Year 3

Active learning ideas

Weathering and Erosion

Active learning is crucial for understanding weathering and erosion because these processes can be difficult to visualize. Hands-on activities allow students to directly experience and manipulate variables, making abstract concepts like rock breakdown and sediment transport tangible and memorable.

• National Curriculum Attainment Targets
• KS2: Science - Rocks

• 25–40 min
• Pairs → Whole Class
• 3 activities

Activity 01

• Hot Seat
• 30 min · Small Groups

Format Name: Rock Weathering Simulation

Provide students with chalk or soft rocks. Have them simulate physical weathering by rubbing rocks together (abrasion) and chemical weathering by soaking chalk in vinegar. They should record observations on how the rocks change.

Analyze how wind and water change the shape of rocks over time.

Facilitation Tip

During the Rock Weathering Simulation, encourage students to experiment with different methods of applying force or substances to their chalk, prompting them to observe and record the results of physical and chemical weathering.

• Apply
• Analyze
• Evaluate
• Social Awareness
• Self-Awareness

Activity 02

• Hot Seat
• 40 min · Small Groups

Format Name: Erosion Tabletop Model

Create a tabletop model with soil, small rocks, and a ramp. Use spray bottles to simulate rain and observe how water moves the soil and rocks downhill. Discuss how different amounts of water or steeper slopes affect erosion.

Design a simple experiment to demonstrate weathering.

Facilitation Tip

In the Erosion Tabletop Model, guide students to systematically change variables like ramp height or water volume during the Experiential Learning activity, asking them to predict and then observe the impact on erosion rates.

• Apply
• Analyze
• Evaluate
• Social Awareness
• Self-Awareness

Activity 03

• Hot Seat
• 25 min · Individual

Format Name: Wind Erosion Art

Students can use straws to blow sand or fine dirt across a surface. They can experiment with different blowing strengths and angles to see how wind moves particles and creates patterns, mimicking wind erosion.

Explain the difference between weathering and erosion.

Facilitation Tip

For Wind Erosion Art, circulate during the Experiential Learning activity to prompt students to compare the effects of different blowing techniques or amounts of sand, reinforcing the concept of wind as an erosional agent.

• Apply
• Analyze
• Evaluate
• Social Awareness
• Self-Awareness

A few notes on teaching this unit

This topic benefits from a pedagogical approach that moves from concrete experiences to abstract understanding. Start with engaging, hands-on activities that allow students to see and feel weathering and erosion in action, then guide them to articulate the scientific principles involved. Avoid simply lecturing about definitions; instead, use student observations as the foundation for explaining the processes.

Students will demonstrate understanding by explaining the difference between weathering and erosion, identifying different types of weathering, and describing how agents of erosion move weathered material. They will be able to connect their observations from the activities to real-world examples.

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Watch Out for These Misconceptions

• During the Rock Weathering Simulation, watch for students who believe rocks only break down due to direct impact.

  Redirect students by asking them to compare the chalk that was soaked in vinegar to chalk that was only rubbed, prompting them to identify chemical vs. physical weathering and natural forces.

• During the Erosion Tabletop Model, watch for students who conflate the processes of weathering and erosion.

  Guide students to observe that the water (agent of erosion) is only moving material that has already been loosened or broken down (weathering); ask them to describe what happens if the soil is not 'weathered' first.

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Methods used in this brief

• Hot Seat