CSS English MCQS with Answers Set 45

Rocks which have solidified directly from molten materials are called igneous rocks.Igneous rocks are commonly referred to as primary rocks because they are the original source of material found in sedimentaries and metamorphics.Igneous rocks compose the greater part of the earth’s crust,but they are generally covered at the surface by a relatively thin layer of sedimentary or metamorphic rocks.Igneous rocks are distinguished by the following characteristics:
(1) they contain no fossils
(2) they have no regular arrangement of layers
(3) they are nearly always made up of crystals.

Sedimentary rocks are composed largely of minute fragments derived from the disintegration of existing rocks and in some instances from the remains of animal As sediments are transported.Individual fragments are assorted according to size.Distinct layers of such sediments as gravels,sand,and clay build up as they are deposited by water and occasionally wind.These sediments vary in size with the material and the power of the eroding agent.Sedimentary materials are laid down in layers called strata.
When sediments harden into sedimentary rocks,the names applied to them change to indicate the change in physical state.Thus,small stones and gravel cemented together are known as conglomerates;cemented sand becomes sandstone;and hardened clay becomes shale.In addition to these,Other sedimentary rocks such as limestone frequently result from the deposition of dissolved material.The ingredient parts are normally precipitated by organic substance such as shells of clams or hard skeletons of other marine life.
Both igneous and sedimentary rocks may be changed by pressure,heat,solution,or cementing action.When individual grains from existing rocks tend to deform and interlock they are called metamorphic rocks.For example granite,an igneous rock,may be metamorphosed into a gneiss or a schist.Limestone,a sedimentary rock,when subjected to heat and pressure may become marble,a metamorphic rock.Shale under pressure becomes slate.
What produces sufficient pressure to alter a rock? Why is marble called a metamorphic rock?

I and II only

III only

I only

I,II,and III

II and III only

One phase of the business cycle is the expansion phase,This phase is a twofold one,including recovery and prosperity,During the recovery period there is ever-growing expansion of existing facilities,and new facilities for production are created.more businesses are created and older ones expanded.Improvements of various kinds are made.There is an ever-increasing optimism about the future of economic growth.Much capital is invested in machinery or “heavy” industry.More labour is employed.More raw materials are required.As one part of the economy develops.other parts are affected.For example a great expansion in automobiles results in an expansion of the steel,glass and rubber industries.Roads are required;thus the cement and machinery industries are stimulated.Demand for labour and materials results in greater prosperity for workers and suppliers of raw  materials,including farmers.this increases purchasing power and the volume of goods bought and sold.Thus prosperity is diffused among the various segments of the population.This prosperity period may continue to rise and rise without an apparent end.However,a time comes when this phase reaches a peak and stops spiralling upwards.This is the end of the expansion phase.
It can be inferred from the passage that the author believes that

With sound economic policies,prosperity can become a fixed pattern

Luxury goods such as jewellery are unaffected by industrial expansion

When consumers lose their confidence in the market,a recession follows

Cyclical ends to business expansion are normal

The creation of new products is essential for properity

The history of mammals dates back at least to Triassic time.Development was retarded,however,until the sudden acceleration of evolutional change that occurred in the oldest Paleocene.This led in Eocene time to increase in average size,larger mental capacity,and special adaptations for different modes of life.In the Oligocene Epoch,there was further improvement,with appearance of some new lines and extinction of others.Miocene and Pliocene time was marked by culmination of several groups and continued approach toward modern characters.The peak of the career of mamals in variety and average large size was attained in the Miocene.
The adaptation of mammals to almost all possible modes of life parallels that of the reptiles in Mesozoic time,and except for greater intelligence,the mammals do not seem to have done much better than corresponding reptilian forms.The bat is doubtless a better flying animal than the pterosaur,but the dolphin horse and the antelope must excel any of the dinosaurs.The tyrannosaur was a more ponderous and powerful carnivore than any flesh-eating mammal,but the lion or tiger is probably a more efficient and dangerous beast of prey because of a superior brain.The significant point to observe is that different branches of the mammals gradually fitted themselves for all sorts of life,grazing on the plains and able to run swiftly (horse,deer,bison).living in rivers and swamps (hippopotamus,beaver),dwelling in trees (sloth,monkey) digging underground (mole,rodent),feeding on flesh in the forest (tiger) and on the plain (wolf),swimming in the sea (dolphin,whale,seal) and flying in the air (bat).Man is able by mechanical means to conquer the physical world and to adapt himself to almost any set of conditions.
This adaptation produces gradual changes of from and structure.It is biologically characteristic of the youthful,plastic stage of a group.Early in its career,an animal assemblage seems to possess capacity for change,which,as the unit becomes old and fixed disappears.The generalised types of organisms retain longest the ability to make adjustments when required,and it is from them that new,fecund stocks take origin – certianly not from any specialised end-products.So,in the mammals we witness the birth plastic spread in many directions,increasing specialisation,and in some branches,the extinction which we have learned from observation of the geologic record of life is a characteristic of the evolution of life.
It can be inferred from the passage that the chronological order of the geologic periods is

Miocene,Paleocene,Triassic,Mesozoic

Mesozoic,Paleocene,Eocene,Miocene

Mesozoic,Oligocene,Paleocene,Miocene

Paleocene,Triassic,Mesozoic,Miocene

Paleocene,Miocene,Triassic,Mesozoic

Rocks which have solidified directly from molten materials are called igneous rocks.Igneous rocks are commonly referred to as primary rocks because they are the original source of material found in sedimentaries and metamorphics.Igneous rocks compose the greater part of the earth’s crust,but they are generally covered at the surface by a relatively thin layer of sedimentary or metamorphic rocks.Igneous rocks are distinguished by the following characteristics:
(1) they contain no fossils
(2) they have no regular arrangement of layers
(3) they are nearly always made up of crystals.

Sedimentary rocks are composed largely of minute fragments derived from the disintegration of existing rocks and in some instances from the remains of animal As sediments are transported.Individual fragments are assorted according to size.Distinct layers of such sediments as gravels,sand,and clay build up as they are deposited by water and occasionally wind.These sediments vary in size with the material and the power of the eroding agent.Sedimentary materials are laid down in layers called strata.
When sediments harden into sedimentary rocks,the names applied to them change to indicate the change in physical state.Thus,small stones and gravel cemented together are known as conglomerates;cemented sand becomes sandstone;and hardened clay becomes shale.In addition to these,Other sedimentary rocks such as limestone frequently result from the deposition of dissolved material.The ingredient parts are normally precipitated by organic substance such as shells of clams or hard skeletons of other marine life.
Both igneous and sedimentary rocks may be changed by pressure,heat,solution,or cementing action.When individual grains from existing rocks tend to deform and interlock they are called metamorphic rocks.For example granite,an igneous rock,may be metamorphosed into a gneiss or a schist.Limestone,a sedimentary rock,when subjected to heat and pressure may become marble,a metamorphic rock.Shale under pressure becomes slate.
The primary purpose of the passage is to

Differentiate between and characterise igneous and sedimentary rocks

Define and describe several diverse kinds of rocks

Show how the scientific names of rocks reflect the rocks’ composition

Explain why rocks are basic parts of the earth’s structure

Explain the factors that may cause rocks to change in form