5. What are earth flow and mudflow?
6. How does frost action take place?
7. How do plant roots, earthworms and burrowing animals cause weathering of rocks?
8. What is soil? What is it composed of?
Observe the picture and answer the que
1. Identify the type of farming shown is
2. Where in India is this type of farmir
3. How is it done?
Answers
Answer:
5. An earthflow (earth flow) is a downslope viscous flow of fine-grained materials that have been saturated with water and moves under the pull of gravity. It is an intermediate type of mass wasting that is between downhill creep and mudflow.
6. Frost action involves the weathering processes caused by repeated cycles of freezing and thawing. Frost action is thus differentiated from glacial action, which involves the processes related to moving ice.
7. A plant's roots grow into a crack in rock. As the roots grow larger, they wedge open the crack. Burrowing animals can also cause weathering. By digging for food or creating a hole to live, in the animal may break apart rock.
8. Soil is a material composed of five ingredients minerals, soil organic matter, living organisms, gas, and water. Soil minerals are divided into three size classes clay, silt, and sand ; the percentages of particles in these size classes is called soil texture.
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