CBSE Class 8 Geography Chapter 2 Important Questions. Soil is the thin layer of material covering the earth’s surface and is formed from the weathering of rocks. It is made up mainly of mineral particles, organic materials, air, water and living organisms—all of which interact slowly yet constantly. The typically developed soil horizons, as illustrated in Figure 5.16, are: O — the layer of organic matter Rocks are broken into several fine pieces due to temperature, rainfall and organic materials over a period of time. This physical and chemical decomposition is primarily done by … It is soft and porous in nature and contains enough nutrients and water for the growth of plants.Most of the landmass of the Earth is not covered with soil. Very well-formed peds which are quite durable and distinct. There chapter wise Practice Questions with complete solutions are available for download in myCBSEguide website and mobile app. iii. Soil is the thin layer of material covering the earth's surface and is formed from the weathering of rocks. iv. So when we fall on the ground, our clothes get dirty because of soil. Given sufficient time under stable environmental conditions, soils will reach a steady state, whereby soil build-up matches their breakdown. myCBSEguide has just released Chapter Wise Question Answers for class 8 Social Science. Soil Formation and Classification. Soil Horizons. Community lands are also called common property resources. ii. Examples of sphere-like soil structure: Often compound structures are met within the soil under natural conditions. ... CBSE Previous Year Question Paper With Solution for Class 12 Commerce; It takes millions of years for the formation of soil. Production of humus from decaying vegetation debris will equal its consumption by soil microbae, fauna and flora. Land, Soil, Water, Natural Vegetation and Wildlife Resources Q1. 6. The National Cooperative Soil Survey identifies and maps over 20,000 different kinds of soil in the United States. Soil is formed by breaking down of rocks at or near the surface of the Earth through various physical, chemical, and biological processes by various factors such as the sun, water, wind, and living organisms. The soil matures. The outer layer of the earth is formed of soil. Soil has been formed from the parent rock material over millions of years. Soil is the uppermost layer of the earth where the growth of all plant life takes. Plains and river valleys offer suitable land for agriculture. Soil is the uppermost layer of landmass of the Earth. These Extra Questions with solution are prepared by our team of expert teachers who are teaching grade in CBSE … Named soils are referred to as soil series. CBSE Important Questions for class 8 Social Science; CBSE Important Questions for class 7. Time: The formation of the soil is not one day process but requires many years to form. The soil will grow in depth through newly formed soil material at the bottom. How is soil formed? Solution Show Solution. Its thickness varies from few millimeters to … Fill in the blanks. Most soils are given a name, which generally comes from the locale where the soil was first mapped. The process of soil formation generally involves the downward movement of clay, water, and dissolved ions, and a common result of that is the development of chemically and texturally different layers known as soil horizons. Soil is formed from he weathering of rocks. It is a life supporting medium, in which plants can grow. i. Three-fourth’s of the earth’s surface is covered with water. For naming a soil structure the sequence followed is grade, class and type; for example, strong coarse angular blocky (soil structure). For instance, sandy soils are normally cemented by iron. The soil horizons are then cemented by the carbonate, iron, and silica minerals. 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