Soils Earth Science Weathering and Formation of Soil Soils Questions How does the bedrock relate to the soil that is formed overtop of it? What is eluviation and in which layer is this most likely to occur? What is illuviation and in which layer does this process primarily occur? What is hummus? What are the main characteristics of the R horizon? What are the main characteristics of the O horizon? Why is soil important to living things? What soils are most porous? What property makes them so porous? How do scientists test the pH of soil? How are soils formed from rock? What properties or characteristics do all types of soil share? How do soils differ from sediments? How does soil differ from dirt? How do the properties and characteristics of soil change when it gets wet? How does the pH of soil change? How do scientists measure the porosity of soil? How do scientists determine the bulk density of soil? How do soils become fertile? How does soil texture differ from soil structure? What type of soils are found in the amazon rainforest? Question #9167a Why are desert soils low in organic matter? How to test acid value of the soil? Question #98d14 Why is soil considered an abiotic factor and a biotic actor? Question #8325d Although desert and arctic climates are extremely different, their soils may be somewhat similar. Why? What are the different types of sand dunes? Question #502d1 What is substratum? What are clay soils and what do they look like? How can you determine if there is air in soil? Weathering and Formation of Soil View all chapters Weathering Soils Prev