:. How are metamorphic rocks formed? What are the uses of rocks and minerals? How is coal formed? What is soil? Write about its composition.
Answers
1.Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors. Conditions like these are found deep within the Earth or where tectonic plates meet.
2.They are used as fuels, for example: coal, petroleum and natural gas. They are used in industries for making medicines, fertlisers and many other items. Iron, bauxite, mica, gold, silver, etc. are examples of minerals.
3.Coal contains the energy stored by plants that lived hundreds of millions of years ago in swampy forests. Layers of dirt and rock covered the plants over millions of years. The resulting pressure and heat turned the plants into the substance we call coal.
4.Soil is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life.
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Answer:
Metamorphic rocks are formed from other rocks that are changed because of heat or pressure. ... Earth movements can cause rocks to be deeply buried or squeezed. As a result, the rocks are heated and put under great pressure . They do not melt, but the minerals they contain are changed chemically, forming metamorphic rocks.
Rocks and minerals are all around us! They help us to develop new technologies and are used in our everyday lives. Our use of rocks and minerals includes as building material, cosmetics, cars, roads, and appliances.
Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.
Soil is the thin layer of material covering the earth’s surface and is formed from the weathering of rocks