A method used to extract petroleum and natural gas:I. Mention the modes of occurrence of minerals?
Answers
Explanation:
Various metals are extracted from these ... used minerals for their livelihood, decoration, ... MODE OF OCCURRENCE OF MINERALS ... like coal, petroleum, natural gas, uranium
Answer:
A method used to extract petroleum and natural gas:I. Mention the modes of occurrence of minerals?
Ans--
Explanation:
What are minerals?
Ans: Homogenous naturally occurring substance with a definite internal structure is known as a mineral.
Minerals are formed in different types of geological environment, under varying conditions. They are created by natural process without any human interference. They can be identified on the basis of their physical properties such as colour, density, hardness and chemical property such as solubility.
Q. What is an ORE?
Ans: An ore is a rock deposit that contains enough mineral to make it economically feasible to extract and purify to derive a desired product material. Typical ores and their desired material extracted are: Magnetite - Iron, Bauxite - Aluminium, Limestone - Lime, Sandstone - Silica.
IMPORTANCE OF MINERALS:
(a) Minerals are used in industries. It is the backbone of industrial development.
(b) Minerals are used for making tools, implements, machines, etc.
(c) Minerals are used in the manufacturing of jewellery, coins, utensils, decorative items, etc.
(d) Minerals are used for construction work.
(e) Minerals are used for health purpose.
In short, Minerals are used in almost every form of life to lead a happy and comfortable life.
PROPERTIES OF MINERALS:
(a) Minerals are non-renewable 'exhaustible' resources.
(b) Minerals take millions of year to form and are present in impure form.
(c) Minerals are unevenly distributed throughout the world.
TYPES OF MINERALS
Over 2000 minerals have been identified and only a few have been abundantly found. On the basis of composition, minerals are classified as:
Q. How are minerals extracted?
Ans: Minerals can be extracted by Mining, Drilling and Quarrying.
(a) Mining: The process of taking out minerals from rocks buried under the earth's surface is called mining.
(i) Open Cast Mining: Minerals that lie at shallow depths are taken out by removing the surface layer is known as "Open Cast Mining".
(ii) Shaft Mining: Deep bores, called shafts, have to be made to reach mineral deposits that lie at great depth, this is known as "Shaft Mining".
(b) Drilling: Petroleum and natural gas occur far below the earth's surface. Deep wells are bored to take them out, this is called "Drilling".
(c) Quarrying: Minerals that lie near the earth's surface are simply dug out by the process known as "Quarrying".