Activity 01
Inquiry Circle: The Erosion Table
In small groups, students build a 'mountain' of sand and soil. They simulate 'rain' using a spray bottle and 'wind' using a fan, observing and sketching how the landscape changes. They then add 'plants' (grass or twigs) to see how it slows the process.
Differentiate between physical and chemical weathering processes.
Facilitation TipDuring The Erosion Table, circulate with a document camera to project close-ups of sediment movement so all students see the same details simultaneously.
What to look forProvide students with three labeled rock samples: one showing clear signs of physical weathering (e.g., rounded edges), one with a color change suggesting chemical weathering (e.g., rust spots), and one with a small crack from a plant root. Ask students to write which type of weathering is most evident on each sample and why.
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Activity 02
Stations Rotation: Weathering Wonders
Set up stations showing different types of weathering: 'Physical' (shaking sugar cubes in a jar), 'Chemical' (vinegar on chalk), and 'Biological' (looking at photos of tree roots splitting rocks). Students identify the 'force' at each station.
Analyze how plant roots contribute to biological weathering.
Facilitation TipIn Weathering Wonders, assign each station a one-minute timer so students rotate efficiently and stay on task without rushing.
What to look forPose this question: 'Imagine a large granite boulder in a hot, dry desert versus the same boulder in a cool, wet rainforest. Which type of weathering would likely be dominant in each location, and what specific processes would be at play?' Facilitate a class discussion where students justify their predictions.
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Activity 03
Gallery Walk: Australian Landmarks
Display photos of the Bungle Bungles, the Remarkable Rocks, and the Blue Mountains. Students move in pairs to discuss and write down whether they think wind, water, or ice was the primary force of erosion for each site.
Predict the dominant type of weathering in a cold, mountainous region.
Facilitation TipFor the Gallery Walk, provide sticky notes in three colors so students categorize each landmark by the dominant weathering type as they move between images.
What to look forOn an index card, ask students to draw a simple diagram illustrating one type of weathering. They should label the diagram and write one sentence explaining the process shown. Collect these to gauge understanding of individual weathering types.
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Generate Complete Lesson→A few notes on teaching this unit
Start with a concrete anchor: show a time-lapse video of a rocky coastline eroding over decades, then break the process into the three weathering types. Avoid teaching these as isolated facts by embedding discussions about scale and time into every activity. Research shows that pairing visual models with hands-on tasks strengthens spatial reasoning, so use cross-sections and labeled diagrams alongside rock samples to link microscopic changes to large landforms.
Students will accurately differentiate between physical, chemical, and biological weathering, explain how each type shapes landforms, and apply their knowledge to real-world examples like Uluru and the Twelve Apostles. Success looks like clear labeling, reasoned predictions, and confident explanations during discussions and investigations.
Watch Out for These Misconceptions
During The Erosion Table, watch for students who label both the breaking and the moving as erosion. Use the mnemonic 'Break it, Take it' while circulating and ask them to point to where the rock is breaking and where the pieces are being taken.
During Weathering Wonders, provide a Venn diagram template and have students sort cards with images and captions into physical, chemical, or biological weathering. Stop at one station and model how to write a sentence that explicitly states what stays still (weathering) and what moves (erosion) for each example.
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