← Geography / 2 Natural Systems and Processes
2.4 Weathering
Geography · Grade 11 · 9 lessons in the design
What this covers
- Agents of weathering on the earth surface
- Types and processes of weathering
- Physical weathering processes
- Chemical weathering processes
- Biological weathering processes
- Significance of weathering to the environment
What you will be able to do
- explain the agents of weathering on the earth surface
- describe the types and processes of weathering in the environment
- illustrate physical and biological weathering processes in the environment
- appreciate the significance of weathering to the environment
Key questions
“How do weathering processes shape the landscapes?”
“Why do some rocks break down faster than others?”
Lessons
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Weathering and its agents
40 min · 1 practice tasks · quizExplain what weathering is and name the agents that cause it.
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Types and processes of weathering
40 min · 1 practice tasks · quizExplain physical, chemical and biological weathering and their processes.
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Physical weathering: temperature changes
40 min · 1 practice tasks · quizExplain insolation, exfoliation and the disintegration of rock by heat.
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Physical weathering: frost, salt and pressure
40 min · 1 practice tasks · quizExplain freeze-thaw, salt crystallisation and pressure release.
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Chemical weathering: solution and carbonation
40 min · 1 practice tasks · quizExplain how water and weak acids dissolve rock minerals.
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Chemical weathering: oxidation and hydrolysis
40 min · 1 practice tasks · quizExplain how oxygen and water change the minerals in a rock.
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Biological weathering
40 min · 1 practice tasks · quizExplain how roots, animals and lichens break down rock.
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Factors influencing weathering
40 min · 1 practice tasks · quizExplain the factors that decide how fast rock weathers.
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Significance of weathering and local field study
40 min · 1 practice tasks · quizDiscuss the importance of weathering and study it in the school locality.