F. Long Answer Type Questions :
1. Write a short note on the crust?
2. What are igneous rocks? How are they formed?
3. What is the difference between organic and inorganic minerals.
4 It is impossible to reach the centre of the earth. Give reasons.
Answers
Answer:
1.In geology, a crust is the outermost layer of a planet. The crust of the Earth is composed of a great variety of igneous, metamorphic, and sedimentary rocks. The crust is underlain by the mantle. The upper part of the mantle is composed mostly of peridotite, a rock denser than rocks common in the overlying crust.
2.Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. All magma develops underground, in the lower crust or upper mantle, because of the intense heat there.
3. Organic minerals are living or were once living. They contain carbon and can promote cell life. ... On the other hand, inorganic minerals are without carbon and have never been living. The body treats these minerals like a toxin, which means that they cannot be broken down easily.
4.Since the temperature and pressure increase enormously as we go deeper and deeper inside the earth, we cannot go to the centre of the earth. ... Answer: Because of extreme heat and pressure, limestone undergoes a change in its form and turns into marble.
Answer:
1 In geology, a crust is the outermost layer of a planet. The crust of the Earth is composed of a great variety of igneous, metamorphic, and sedimentary rocks. The crust is underlain by the mantle. The upper part of the mantle is composed mostly of peridotite, a rock denser than rocks common in the overlying crust
2 Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. All magma develops underground, in the lower crust or upper mantle, because of the intense heat there.
3Organic minerals- these are once living, or are living and can bring life to cells. ... Inorganic materials- these were never living, without carbon and cannot bring life to cells. The body treats these metals like toxins. These materials are tightly held together; they cannot be easily broken down.
4Since the temperature and pressure increase enormously as we go deeper and deeper inside the earth, we cannot go to the centre of the earth. Question 2: Sedimentary rocks are formed from sediments
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