Question 1

Question 2Why do you think that solar energy has a bright future in India?

Accepted Answer

Solar energy has a bright future in India because:India is a tropical country. Most parts of the country have 300 clear sunny days in a year. This provides enormous possibilities of tapping Solar energy.Solar energy can enhance India's energy security by reducing its dependence on fossil fuel imports to meet its growing energy needs.Solar energy is clean and renewable source of energy.The cost of solar panels and associated technologies has been steadily declining, making solar energy increasingly affordable.Solar energy is gaining popularity in rural and remote areas.Solar energy will replace firewood and dung cakes in rural areas, conserving the environment and ensuring adequate supply of dung cake based manure for agriculture.

Question 2

Question 1Distinguish between the following in not more than 30 words.(a) ferrous and non-ferrous minerals(b) conventional and non-conventional sources of energy

Accepted Answer

(a) Differences between ferrous and non-ferrous minerals:S.No.Ferrous mineralsNon-ferrous minerals1.They contain iron.They do not contain iron.2.They are mainly used in building and construction industry.They are mainly used in electrical and automobile industry.3.E.g., Manganese, Nickle, CobaltE.g., Bauxite, Copper(b) Differences between conventional and non-conventional sources of energy:Sl.NoConventional sources of energyNon-conventional sources of energy1.They are non-renewable.They are renewable.2.They cause pollution.They are non-polluting.3.They have been in use from a long time.Technologies to use these sources have been recently developed or is still developing.3.E.g., Coal, natural gas.E.g., Solar energy, Wind energy

Question 3

Question 3How are minerals formed in igneous and metamorphic rocks?

Accepted Answer

In igneous and metamorphic rocks, minerals are formed when substances in liquid/molten and gaseous forms are forced upward through cavities towards the earth's surface. They cool and solidify as they rise and get deposited in the cracks, crevices, faults or joints of these rocks.

Question 4

Question 4Why do we need to conserve mineral resources ?

Accepted Answer

Mineral resources are limited on earth. If we continue to extract mineral at the same pace as we are doing now, they will soon exhaust. Therefore, we need to conserve mineral resources.

Minerals and Energy Resources

Answer in about 120 words

Answer in about 30 words