1. What are minerals? What are the different types
of minerals? Give one example for each
2. What is an ore? How are ores classified?
3. Write a note on minerals found in Asia.
4. Write a note on fossil fuels.
5. What is geothermal energy?
6. What is wind energy?
Answers
Answer:
1. Minerals are solid substances that are present in nature and can be made of one element or more elements combined together .
Types of minerals
- Native elements. eg. Gold, Silver, Mercury, graphite, diamond.
- Oxides. eg corundum (incl. sapphire), hematite, spinel.
- Hydroxides. eg. Goethite, brucite.
- Sulfides. eg. Pyrite, galena, sphalerite.
- Sulfates. eg. Baryte, gypsum.
- Carbonates. eg. Calcite, magnesite, dolomite.
- Phosphates. eg. Apatite, monazite.
2. ore is a rock or earth from which metal can be taken.
Ores are classified based on how they form. ... Metamorphic ores often contain lead, zinc, and silver, as well as some iron oxides. Sedimentary ore deposits include banded iron formations, and gold, platinum, zinc, tin, and even diamond-containing ores that formed in sedimentary environments.
3. Mica is abundant in eastern Siberia and is also found in large quantities in India. Asia has vast reserves of rock salt, but the hills and “glaciers” of salt in southern Iran have not been exploitable. Deposits of sulfur and gypsum are abundant in Central and West Asia.
4. Fossil fuels are hydrocarbons, primarily coal, fuel oil or natural gas, formed from the remains of dead plants and animals. A small portion of hydrocarbon-based fuels are biofuels derived from atmospheric carbon dioxide, and thus do not increase the net amount of carbon dioxide in the atmosphere.
5. Geothermal energy is the heat energy from hot rock present inside the earth. This heat comes from the fission of radioactive materials which are naturally present in these rocks. The places where very hot rocks occur at some depth below the surface of earth are called hot spots, and are sources of geothermal energy.
6. Wind energy is a form of solar energy. Wind energy (or wind power) describes the process by which wind is used to generate electricity. Wind turbines convert the kinetic energy in the wind into mechanical power. A generator can convert mechanical power into electricity.
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Answer:
Ans 1. A mineral is a naturally occurring inorganic solid, with a definite chemical composition, and an ordered atomic arrangement. This may seem a bit of a mouthful, but if you break it down it becomes simpler. Minerals are naturally occurring. They are not made by humans. Minerals are inorganic.
Types of minerals
Silicates, oxides, sulfates, sulfides, carbonates, native elements, and halides are all major mineral groups.
Ans 2. Ores are classified based on how they form. ... Metamorphic ores often contain lead, zinc, and silver, as well as some iron oxides. Sedimentary ore deposits include banded iron formations, and gold, platinum, zinc, tin, and even diamond-containing ores that formed in sedimentary environments.
Ans 3. Nonmetallic minerals:
Mica is abundant in eastern Siberia and is also found in large quantities in India. Asia has vast reserves of rock salt, but the hills and “glaciers” of salt in southern Iran have not been exploitable. Deposits of sulfur and gypsum are abundant in Central and West Asia.
Ans 4. Fossil fuels are hydrocarbons, primarily coal, fuel oil or natural gas, formed from the remains of dead plants and animals. A small portion of hydrocarbon-based fuels are biofuels derived from atmospheric carbon dioxide, and thus do not increase the net amount of carbon dioxide in the atmosphere.
Ans 5. Geothermal energy is heat derived within the sub-surface of the earth. Water and/or steam carry the geothermal energy to the Earth's surface. Depending on its characteristics, geothermal energy can be used for heating and cooling purposes or be harnessed to generate clean electricity.
Ans 6.Wind energy is a form of solar energy. Wind energy (or wind power) describes the process by which wind is used to generate electricity. Wind turbines convert the kinetic energy in the wind into mechanical power. A generator can convert mechanical power into electricity.
Explanation:
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