Answer: The three common minerals used by us everyday are:
Answer:Ores are those rock from which minerals are extracted or obtained. The ores of metallic minerals are located in igneous and metamorphic rocks formations.
Answer:The two regions rich in natural gas resources are :-
Rural areas :Coal and firewood should be used in rural areas because it is easily available and it can be used for large number of people.
Coastal areas :Wind Energy and Hydel power should be used in coastal areas because they are non polluting and it promotes irrigation and fishing and it is cheap.
Arid regions: Geothermal and solar energy should be used in arid regions.
Answer:The five ways in which we can save energy at home are :
(a) They are created by natural processes.
(b) They have a definite chemical composition.
(c) They are inexhaustible.
(d) Their distribution is uneven.
(d) Andhra Pradesh
(a) Soaking the dal for some time before cooking it.
(b) Cooking food in a pressure cooker.
(c) Keeping the vegetables chopped before lighting the gas for cooking.
(d) Cooking food in an open pan kept on low flame.Answer :-
(i) (c) They are inexhaustible.
(ii) (b) Karnataka
(iii) (c) Chile
(iv) (d) Cooking food in an open pan kept on low flame.
Answer :-Environmental aspects must be carefully looked into before building huge dams because of the following reasons :-
Answer :-Coal is the most abundantly found fossil fuel. It is used as a domestic fuel, in industries, steam engines and to generate electricity. Most industries are built around coal mines so that the cost of transportation is reduced and fuel is easily available.
Answer :-Petroleum is referred to as Black gold because it is very valuable. The refineries process the crude oil and produce a variety of products like diesel, petrol, kerosene, wax, plastics and lubricants.
Answer :-Quarrying is one of the methods of extraction of minerals. Minerals that lie near the surface are simply dug out in quarrying. It affects the land, soil and natural vegetation of that area.
|Conventional source of energy||Non conventional source of energy.|
|Conventional source of energy are those which are being used from a long period of time.||Non conventional source of energy are those which are not being commonly used..|
|Examples are fire Woods and fossil fuels.||Examples are solar energy tidal energy wind energy nuclear energy and biogas.|
|They causes environmental pollution.||They are environment friendly.|
|It is obtained from the decomposition of organic waste.||It is obtained from the extraction of petroleum.|
|It is a non-conventional source of energy||It is a conventional source of energy|
|It is easily available.||It is not easily available.|
|It is a renewable source.||It is a non renewable source.|
|Ferrous mineral||Non-ferrous minerals|
|Ferrous minerals are those which contain iron in them.||Non-ferrous minerals do not contain iron in them.|
|Examples:- iron ore, manganese and chromite||Example:- Limestone|
|Metallic minerals||Non-metallic minerals|
|Metallic minerals contain metals in the raw form.||They do not contain metals.|
|Examples:- iron ore, bauxite, manganese ore||Examples:- limestone mica and gypsum.|