Types of Weathering

Weathering and erosion are abstract processes that students rarely witness in real time, so active learning transforms these invisible forces into tangible, memorable experiences. Hands-on investigations let students manipulate variables, observe immediate effects, and connect cause to effect, which builds lasting understanding of how landscapes change over time.

• Year 5
• Science
• 3 activities
• 30 min–50 min

Learning Objectives

1. Classify rock samples based on observable evidence of physical, chemical, and biological weathering.
2. Explain the mechanisms of physical weathering, such as frost wedging and abrasion.
3. Compare and contrast the chemical reactions involved in chemical weathering, like oxidation and acid dissolution.
4. Analyze the role of living organisms in biological weathering, citing specific examples.
5. Predict the dominant weathering process in a given Australian environment based on climate and biological activity.

Inquiry Circle

⏱ 50 min·Small Groups

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.

Prepare & details

Differentiate between physical and chemical weathering processes.

Facilitation Tip: During The Erosion Table, circulate with a document camera to project close-ups of sediment movement so all students see the same details simultaneously.

Setup: Groups at tables with access to source materials

Materials: Source material collection, Inquiry cycle worksheet, Question generation protocol, Findings presentation template

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Stations Rotation

⏱ 40 min·Small Groups

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.

Prepare & details

Analyze how plant roots contribute to biological weathering.

Facilitation Tip: In Weathering Wonders, assign each station a one-minute timer so students rotate efficiently and stay on task without rushing.

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

Gallery Walk

⏱ 30 min·Pairs

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.

Prepare & details

Predict the dominant type of weathering in a cold, mountainous region.

Facilitation Tip: For the Gallery Walk, provide sticky notes in three colors so students categorize each landmark by the dominant weathering type as they move between images.

Setup: Wall space or tables arranged around room perimeter

Materials: Large paper/poster boards, Markers, Sticky notes for feedback

• Understand
• Apply
• Analyze
• Create
• Relationship Skills
• Social Awareness

Teaching This Topic

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.

What to Expect

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

Common Misconception

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.

What to Teach Instead

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.

Assessment Ideas

Quick Check

After The Erosion Table, hold up each rock sample from the assessment idea and ask students to hold up one finger for physical, two for chemical, or three for biological weathering. Tally responses to quickly gauge whole-class understanding before moving to the next sample.

Discussion Prompt

During the Gallery Walk, after students have visited at least four landmarks, reconvene and pose the desert versus rainforest question. Listen for students to reference specific weathering processes (e.g., thermal expansion, hydrolysis) they observed or read about during the walk.

Exit Ticket

After Weathering Wonders, collect the labeled diagrams from the exit-ticket assessment idea and use them to create a class anchor chart. Return the cards the next day so students can compare their initial ideas to the chart and revise as needed.

Extensions & Scaffolding

• Challenge early finishers to design a comic strip showing how one landmark would change over 10,000 years under constant weathering.
• Scaffolding for struggling learners: provide a word bank and sentence stems during the Gallery Walk to support written explanations.
• Deeper exploration: invite students to research how human activity (e.g., mining, agriculture) accelerates weathering and present findings to the class.

Key Vocabulary

Physical Weathering	The breakdown of rocks into smaller pieces without changing their chemical composition. Examples include frost action and abrasion.
Chemical Weathering	The decomposition of rocks through chemical reactions, altering their mineral composition. Oxidation and acid rain are common examples.
Biological Weathering	The weakening and breakdown of rocks caused by living organisms, such as plant roots growing into cracks or burrowing animals.
Abrasion	The process where rocks are worn down by friction, typically caused by particles carried by wind, water, or ice.
Oxidation	A chemical reaction where a substance combines with oxygen, often causing rust-like changes in rocks containing iron.