HSC Commerce 12th Board ExamMaharashtra State Board
Share
Notifications

View all notifications
Books Shortlist
Your shortlist is empty

Read the Following Extract and Answer the Questions Given Below : Oil is One of the World'S Major Sources of Energy. We Depend on It as Fuel for Heating, Transport and Generation of Power. - HSC Commerce 12th Board Exam - English

Login
Create free account


      Forgot password?

Question

(A) Read the following extract and answer the questions given below :
Oil is one of the world's major sources of energy. We depend on it as fuel for heating, transport and generation of power.
For centuries, animal and vegetable oils have been used for cooking and as a source of artificial light. But it is mineral oil which meets most of the world's needs today.
Crude mineral oil comes out of the earth as a thick brown
or black liquid with a strong smell. It is a complex mixture of many different substances, each with its own individual qualities. Most of them are combinations of hydrogen and carbon in varying proportions. Such hydro-carbons are also found in other forms such as bitumen, asphalt and natural gas. Mineral oil originates from the carcasses of tiny animals and from plants that live in the sea. Over millions of years these dead creatures form large deposits under the sea bed and ocean currents cover them with a blanket of sand and silt. As this material hardens, it becomes sedimentary rock and effectively shuts out the oxygen so preventing the complete decomposition of the marine deposits underneath. The layers of sedimentary rock become thicker and heavier. Their pressure produces heat, which transforms the tiny carcasses into crude oil in a process that is still going on today .
The earth's crust is split into a few hu·ge continental plates which move continuously rather like rafts on a sluggish tide.
Geologists call this rnoven1ent as 'continental drift'.

(1) What does the extract ·tell us about? (1)

(2) In which form does crude mineral oil come out of the earthand from what does it originate? (2)

(3) How is 'continental drift' formed? (2)

(4) According to you, how can we stop the excess use of energy?  (2)
(5) Rewrite the following sentences in the ways instructed :
(i) Oil is one of the world's major sources of energy.
(Rewrite it as a negative sentence without changing its meaning.) (1)

(ii) As this material hardens, it becomes sedimentary rock.
(Make it.a compound sentence.) (1)

(iii) Geologists call this movement as 'con·tinental drift' .
(Frame a 'Wh-question' to get the underlined part as an answer.) (1)

(6) Give the antonyms fr.om the extract for :
(i) artificial
(ii) lighter

(B) Write·a brief summary of the above extract with the help of the points given below and suggest a suitable title.
Oil as a source of energy - our dependence - types of oil -mineral oil origin of crude oil formation of crude oil -farming of sedimentary rocks - continental drift 

Solution

(1) Ans: The extract tell us about the different types of Oils, its uses and the process of Oil formation. 

(2) Ans: Crude mineral oil comes out of the earth as a thick brown or balck liquid with a strong smell. It is a complex mixture of many different substances, each with its own individual qualities and it originates from the carcasses of tiny animals and from plants that live in the sea. 
 
(3) Ans: Continental drift is formed when the earth’s crust is split into a few huge continental plates which move continuously rather like rafts on a sluggish tide and this movement is called as ‘continental drift’ by the Geologists. 

(4) Ans: We can stop the excess use of energy by the following methods:
(i) Energy conservation - Petro chemicals form one of the major part of energy which is used in a day to day life in the form of mode of transportation which can be save by optimum utilization of fuels and turning of the engines when not needed.
(ii) Saving energy - A lot of energy is used in rural and urban areas in the form of coal which actually componsates to major part of air pollution as it releases a lot poisonous gases and not used to the optinum level. This can be saved by replacing this coal chimines with LPG.
(5)
(i)
Ans: No other source of energy is as major as oil.
(ii) Ans: This material hardens and it becomes sedimentary rock.
(iii) Ans: What do Geologists call this movement?
(6)
(i) Ans: Mineral
(ii) Ans:  Thicker
(B)
Oil - The Source of Life
Oil as a source of energy, which forms a major part of our life in various natural and man made commodities which makes our day to day dependence on it such as transport, heating and generation of power. There are different types of oil as follows, mineral oil, crude oil and continental drift. Mineral oil originates from the carcasses of tiny animals and from plants that live in the sea. Crude oil comes out of the earth as a thick brown or black liquid with a strong smell. It is a complex mixture of many different substances, each with its own individual qualities. Crude oil is formed over millions of years these dead creatures form large deposits under the sea bed and ocean currents cover them with a blanket of sand and silt.This material hardens and becomes sedimentary rock and effectively shuts out the oxygen so preventing the complete decomposition of the marine deposits underneath. Then the earth’s curst is split into a fee huge continental plates which move continuously rather like rafts on a sluggish tide which helps in forming ‘continental drift’
  Is there an error in this question or solution?
Solution Read the Following Extract and Answer the Questions Given Below : Oil is One of the World'S Major Sources of Energy. We Depend on It as Fuel for Heating, Transport and Generation of Power. Concept: Reading Skill.
S
View in app×