AC9S5U02: Describe how weathering, erosion, transportation and deposition cause slow or rapid change to Earth’s surface

Students distinguish breakdown from movement and settling, model agents such as water, wind and ice and explain how process rate depends on material, slope, vegetation, climate and time.

Weathering breaks material down; erosion removes it, transportation moves it and deposition occurs when energy decreases and sediment settles.

The processes interact but are not synonyms. One landscape may experience weathering, erosion and deposition in different locations at the same time.

Models should preserve direction and cause but may accelerate time and simplify rock type, rainfall variability and scale.

Learning routine: Observe → Model → Investigate → Analyse → Explain → Evaluate

Success looks like

• Identify system components
• Explain relationships with a model
• Use evidence from a fair method
• Apply to a new context
• Evaluate limits and further questions

weathering

breakdown of rock in place

erosion

removal of weathered material

deposition

settling of transported sediment

Content description: describe how weathering, erosion, transportation and deposition cause slow or rapid change to Earth’s surface.

• E1: identifying types of weathering caused by mechanical means such as by wind abrasion, cycles of extreme heat or cold, and frost wedging; and biological means such as by plants and tree roots
• E2: exploring how erosion can be caused by moving air or moving water and how substances such as surface soil are relocated, and identifying examples of erosion on a local or regional scale
• E3: analysing the difference between weathering and erosion and comparing the timescales over which these processes can occur
• E4: modelling the effects of erosion on a simulated landscape and exploring factors that mitigate its effects
• E5: investigating how humans have changed local landscapes and predicting the effect these changes might have on rates of erosion
• E6: considering how First Nations Australians are impacted by the rapid erosion of sand dunes and the resulting effect of saltwater on culturally significant freshwater swamps
• E7: considering the effects of significant rainfall, such as a monsoon, on the transportation and deposition of river sediments in the Asia-Pacific region

Core idea: Weathering breaks material down; erosion removes it, transportation moves it and deposition occurs when energy decreases and sediment settles.

Remember

• Identify system components
• Explain relationships with a model
• Use evidence from a fair method
• Apply to a new context
• Evaluate limits and further questions

Important questions

• Distinguish four processes. Explain using the model or evidence above.
• Explain vegetation effect. Explain using the model or evidence above.
• Predict deposition location. Explain using the model or evidence above.
• Identify an agent. Explain using the model or evidence above.
• State a model limitation. Explain using the model or evidence above.

Learn from the Topic Guide and fixed Teacher Slides, complete the Practice Sheet, use Practice for supported feedback, then take the Test when ready.

Project the fixed branded slide deck one slide at a time.

• Weathering and erosion are the same — Weathering is breakdown in place; erosion removes material.
• Deposition destroys land only — It builds features such as deltas, beaches and bars.
• Change occurs only during disasters — Slow repeated processes also reshape landscapes.
• Model time equals real time — Classroom models accelerate and simplify processes.

Curriculum equivalents for How weathering, erosion, transportation and deposition cause slow or rapid...

Mapped skill: describe how weathering, erosion, transportation and deposition cause slow or rapid change to Earth’s surface

These references identify matching or closely related learning. Curriculum sequence, terminology and depth vary, so teachers should use the mapped skill and lesson difficulty to confirm suitability.

Australian Curriculum v9.0 is the canonical source for this SkillrHub lesson. Victoria and NSW entries name the closest published state codes or outcomes; international entries are planning references rather than claims of identical curricula.

Australian Curriculum Version 9.0

• AC9S5U01: Structural and Behavioural Adaptations
• AC9S5U03: Reflection, Refraction and Absorption of Light
• AC9S5U04: Solids, Liquids and Gases
• AC9S5H01: How Scientific Knowledge Develops
• AC9S5H02: Science, Decisions and Unintended Consequences
• AC9S5I01: Scientific Questions, Variables and Predictions