1
How Soil Forms
Describe how rocks break down and organic matter helps form soil over time.
Chapter route
Soil
This chapter page turns the high-level subject view into an ordered learning slice, with direct links from curriculum items into topic and skill detail.
Ordered curriculum items
Each curriculum item can now route into topic and skill-level detail.
2
Soil Horizons
Recognize topsoil, subsoil, parent material and bedrock with their features.
3
Types of Soil
Use particle size, water holding and air spaces to compare soil types.
4
Water in Soil
Calculate or compare percolation rate and water holding capacity from data.
5
Soil for Crops
Explain why different crops grow better in different soils.
6
Soil Erosion and Conservation
Identify deforestation, wind, water and farming practices that affect soil erosion.
7
Life in Soil
Explain how earthworms, microbes and humus improve soil fertility.
8
Reasoning with Soil Data
Interpret soil observations to choose crops, irrigation or conservation methods.
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Chapter routes make the curriculum map feel sequential instead of abstract.
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