Ans. On the basis of composition, minerals are classified mainly as metallic and non-metallic minerals. Metallic minerals are further classified as ferrous or non-ferrous.
Ans. Nuclear power is obtained from energy stored in the nuclei of atoms of naturally occurring radioactive elements like uranium and thorium. These fuels undergo nuclear fission in nuclear reactors and emit power.
Ans. Rocks from which minerals are mined are known as ores. Generally, metallic minerals are found in igneous and metamorphic rock formations that form large plateaus.
Ans. Construction of a huge dam affects the natural vegetation and wildlife of the area adversely. Hence, environmental aspects must be carefully looked into before building huge dams.
Ans. The nuclear power stations in India are located in Kalpakkam in Tamilnadu, Tarapur in Maharastra, Ranapratap Sagar near Kota in Rajasthan, Narora in Uttar Pradesh and Kaiga in Karnataka.
Ans. Coal is the most abundantly found fossil fuel. It is used as a domestic fuel and also as a raw material in many industries. Hence, most industries are concentrated around coal mines to reduce the cost of transportation.
Ans. Rural areas – Solar energy, Wind energy and Biogas energy
Coastal areas – Wind energy and Tidal energy
Arid regions – Wind energy and Solar energy
Ans. Europe is the leading producer of iron-ore in the world. The countries with large deposits of iron ore are Russia, Ukraine, Sweden and France. Minerals deposits of copper, lead, zinc, manganese and nickel are found in eastern Europe and European Russia.
Ans. Ways to conserve minerals:
i. Reduce wastage in the process of mining.
ii. Recycle metals.
iii. Use minerals in a planned and sustainable manner.
Ans. The chief petroleum producing countries are Iran, Iraq, Saudi Arabia and Qatar. The other major producers are USA, Russia, Venezuela, and Algeria. The leading producers in India are Digboi in Assam, Bombay High in Mumbai and the deltas of Krishna and Godavari rivers.
i. Destroys wildlife habitat.
ii. Difficult to harness.
Ans. Difference between a rock and an ore
A rock is an aggregate of one or more minerals but without definite composition of constituent of mineral.
Rocks from which minerals are mined are known as ores.
Ans. (d) Cooking food in an open pan kept on low flame.
Download to practice offline.