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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Class 11 knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
Which people called sindu as indus ? |
| Answer» The name ‘India’ was originated from Indus valley civilization.Huns, Egyptians, Persians, and other countrymen used to enter India by crossing Indus river. The word Hindu originated from Sindhu. People from these countries used to pronounce S as H and so they called Sindhu as Hindu.Egyptians and Romans used to call Indus as Sindhu valley and eastern part of it as India. | |
| 502. |
Which people calles sindhu as indus ? |
| Answer» The name ‘India’ was originated from Indus valley civilization.Huns, Egyptians, Persians, and other countrymen used to enter India by crossing Indus river. The word Hindu originated from Sindhu. People from these countries used to pronounce S as H and so they called Sindhu as Hindu.Egyptians and Romans used to call Indus as Sindhu valley and eastern part of it as India. | |
| 503. |
What are the effect of propagation of earthquake wave on the rocks mass through which they travel? |
| Answer» The earthquake waves cause vibration in the body of the rocks through which they pass. P-waves vibrate parallel to the direction of the wave. This exerts pressure on the material in the direction of the propagation. As a result, it creates density differences in the material leading to stretching and squeezing of the material. Other three waves vibrate perpendicular to the direction of propagation. The direction of vibrations of S-waves is perpendicular to the wave direction in the vertical plane. Hence, they create troughs and crests in the material through which they pass. Surface waves are considered to be the most damaging waves. | |
| 504. |
De describe the geomorphic process in reference of evolution of landforms |
| Answer» | |
| 505. |
Why do earthquake wave develop shadow zone? In 80wards |
| Answer» The\xa0shadow zone\xa0is the area of the earth from angular distances of 104 to 140 degrees from a given\xa0earthquake\xa0that\xa0does\xa0not receive any direct P\xa0waves. The\xa0shadow zone\xa0results from S\xa0waves\xa0being stopped entirely by the liquid core and P\xa0waves\xa0being bent (refracted) by the liquid core.\xa0The\xa0earthquake waves develop shadow zones\xa0because: (i)The P and S\xa0waves\xa0follow a curved path in the interior of the earth which proves that the density increases inside the earth. (iii)On reaching the core \'S\'\xa0waves\xa0disappear and P\xa0waves\xa0are refracted as a result there is no\xa0wave\xa0for a distance. | |
| 506. |
What is shadow zone? |
| Answer» \tThe shadow zone is the zone of the earth from angular distances of 104 to 140 degrees from a given earthquake that does not receive any direct P waves.\tThe shadow zone results from P waves being refracted by the liquid core and S waves being stopped completely by the liquid core.\tA zone between 105° and 145° from the\xa0epicenter was recognized as the shadow zone for both the wave types.\tThe entire zone beyond 105° does not receive S-waves.\tThe shadow zone of S-wave is larger than that of the P-waves.\tThe shadow zone of P-waves appears as a band around the earth between 105° and 145° away from the epicenter. | |
| 507. |
Explain different types of earthquake |
| Answer» There are four different types of earthquakes: Tectonic, volcanic, collapse and explosion.\tA\xa0tectonic\xa0earthquake is one that occurs when the earth\'s crust breaks due to geological forces on rocks and adjoining plates that cause physical and chemical changes.\tA\xa0volcanic\xa0earthquake is any earthquake that results from tectonic forces which occur in conjunction with volcanic activity.\tA\xa0collapse\xa0earthquake are small earthquakes in underground caverns and mines that are caused by seismic waves produced from the explosion of rock on the surface.\tAn\xa0explosion\xa0earthquake is an earthquake that is the result of the detonation of a nuclear and/or chemical device. | |
| 508. |
What are different sources of information about the interior of the earth |
| Answer» Lava, fossils<br>Analysis of properties of matter indirectly provides information about the interior\tMeteors\tGravitation\tMagnetic field\tSeismic Activity. | |
| 509. |
Differentiate between convection, conduction and advection. |
| Answer» \tConductionConvectionRadiationIn conduction, heat transfer takes place between objects by direct contact.In convection, the heat transfer takes within the fluid.In radiation, heat transfer occurs through electromagnetic waves without involving particles.The heat transfer takes place due to the difference in temperature.The heat transfer occurs due to the difference in density.The heat transfer occurs in all objects with a temperature greater than 0 K.The heat transfer in conduction is slowThe heat transfer in convection is faster.The heat transfer in radiation is the fastest.The heat transfer occurs through a heated solid object.The heat transfer occurs through intermediate objects. For example, heat transfer between air and water.The heat transfer occurs through electromagnetic waves.It does not follow the law of reflection and refraction.It does not follow the law of reflection and refraction.It follows the law of reflection and refraction.\t | |
| 510. |
Physical and human factors both are dynamic not static. Explain. |
| Answer» The geographical phenomenal both physical and human are not static, they are highly dynamic because of the inter-active processes between ever hanging earth and ever-active and untiring human beings. EXPLANATION: Since geography is related to studying the Earth, and the Earth is continually changing. | |
| 511. |
Geography as an integration discipline |
| Answer» Geography adopts a holistic approach in its study and recognizes the interdependencies that exist in the world. Quick and efficient means of transportation have converted the present day world into a global village. Data base has been enriched by audio visual media and information technology. Being and integrating discipline Geography is linked with several natural and Social Sciences. The primary aim of natural and Social Sciences is to understand the reality. Geography is equipped to comprehend the association of Alumina as related sections of reality. The relation of Geography with several natural, social and biological are closely related to Geography because there are spatial changes in their elements. Geography is a subject which is capable of making us understand the reality in totality in its onpress perspective. Thus Geography take note of spatial variation in the phenomena and also integrates them holistically. Obviously a Geographer is supposed to have that basic knowledge of all the related fields is necessary to have a proper understanding of geography. | |
| 512. |
What is the importance of oxygen and carbon diaoxide in the atmosphere ? |
| Answer» Oxygen from the atmosphere is combined with carbohydrates to liberate the stored energy. Water and carbon dioxide are byproducts. Notice that photosynthesis and respiration are essentially the opposite of one another. Photosynthesis removes CO2 from the atmosphere and replaces it with O2. | |
| 513. |
Explain the significance of water vapour in the atmosphere ? |
| Answer» Moisture present in the atmosphere in the form of gaseous state is called water vapour.Humidity is the amount of water vapour present in the atmosphere.1. There is a variation in the content of water vapour in the atmosphere with respect to time and place.2. As one goes higher in the altitude, the amount of water vapour decreases. Above twelve km from the earth\'s surface, there is almost no water vapour.3. In polar regions it is practically absent in winter while in warm and humid equatorial regions have a high amount of water vapour.4. Water vapour is the source of moisture for clouds, rain and frost.5. Water vapour is the gas that absorbs heat. Hence, it is so a greenhouse gas. It releases this heat when it condenses.6. It plays a prominent role in heating and cooling of the atmosphere. | |
| 514. |
How is carbon diaoxide is largely responsible for greenhouse effect ? |
| Answer» Greenhouse gases are those that absorb and emit infrared radiation in the wavelength range emitted by Earth. In order, the most abundant greenhouse gases in Earth\'s atmosphere are water vapor (H2\u200bO), carbon dioxide (CO2\u200b), methane (CH4\u200b), nitrous oxide (N2\u200bO), ozone (O3\u200b), chlorofluorocarbons (CFCs). | |
| 515. |
Describe the internal structure of the earth with its layers |
| Answer» The Earth is made up of several layers one inside the other, just like an onion. Following are the main layers of the Earth:Crust\tThe crust is the uppermost layer found on the surface of the Earth.\tIt is the thinnest of all the layers and is about 35 km on the continental masses and only about 5 km on the ocean floor.\tTwo main mineral constituents of the continental mass are silica and alumina. Therefore, continental crust is also called\xa0sial.\tThe oceanic crust consists mainly of silica and alumina. Therefore, it is known as\xa0sima.Mantle\tThis layer of the Earth lies underneath the crust.\tIt extends up to a depth of 2,900 km below the Earth’s crust.\xa0Core\tIt is innermost layer of the Earth with a radius of about 3500 km.\tIt is called nife as it is made up of nickel and iron (ni-nickle; fe-ferrous or iron).\tThere is very high temperature and pressure inside the Earth’s core. | |
| 516. |
What is pedology? |
| Answer» \tPedology is one of the two branches of soil science. The other branch is edaphology.\tPedology deals with the study of soils. It studies formation of soil, its morphology and classification of soils. The person who studies above aspects is known as pedologist. | |
| 517. |
Distinguish between body waves and surface waves |
| Answer» Body wave -A body wave is a seismic wave that moves through the interior of the earth, as opposed to surface waves that travel near the earth\'s surface. P and S waves are body waves. Each type of wave shakes the ground in different ways...Surface wave -seismic wave that travels across the surface of the Earth as opposed to through it. Surface waves usually have larger amplitudes and longer wavelengths than body waves, and they travel more slowly than body waves do. Love waves and Rayleigh waves are kinds of surface waves. | |
| 518. |
How our surroundings affect our day to day life? |
| Answer» | |
| 519. |
India location answer questions |
| Answer» Find in this app | |
| 520. |
How earthquake waves help us in knowing about the interior of the earth?\u200b |
| Answer» | |
| 521. |
What are the main sources of information regarding the interior of earth . |
| Answer» The main sources of information regarding the interior of the earth our direct sources and indirect sources.Direct sources includes mining, bores and wells and volcanic eruption.Indirect sources are density, temperature pressure, meteors, gravitation , systemic activity and magnetic field . | |
| 522. |
What are the different approach to the study of geography |
| Answer» The major approaches to study geography have been\tSystematic and\tRegional. | |
| 523. |
What do we study under human geography |
| Answer» | |
| 524. |
What is difference between physical geography and human geography ?/?❓❓❓ |
| Answer» Thanks yogita di?<br>???<br>\tPhysical GeographyHuman GeographyPhysical geography Looks at the Natural process of the Earth, such as climate and plate tectonics, wind movements etcHuman geography looks at the impact and behaviour of people and their implications in the physical worldAreas of Physical Geography include: Geomorphology: The shape of the\xa0structure of the Earth\xa0and how they were formedHydrology: Study of Earth’s WaterGlaciology: Study of Earth’s glaciers and ice sheetsClimatology: Study of the Earth’s climateAreas of Human Geography include:\xa0Cultural Geography: How things like religion, language and government vary across the worldDevelopment Geography: Standards of living and quality of life across the worldHistorical Geography: How people have studied and thought about geography in the pastUrban Geography: Cities and Built-u\t | |
| 525. |
Write the importance of tides |
| Answer» \xa0The importance of tides are:\xa0\xa0\tThey can cause a change in landforms of the Earth. While they can destroy coastlines, they also help in the formation of creeks and inlets.\t\xa0\t\tStrong tides help in the building of lower flood plains of rivers. These are very fertile.\t\xa0\t\tSince the debris is swept away by tides, they help to keep the\xa0harbours\xa0clean.\t\xa0\t\tIn cold countries, tides bring in salt water to the shore and their continuous movement prevents the\xa0harbour\xa0from becoming ice bound.\t\xa0\t\tThe low lying areas of the sea coast during high tides trap water which is used for the manufacturing of salt. In India, along the west coast, salt is manufactured in this manner.\t\xa0\t\tThe alternate rise and fall of the tides help the fisherman to sail out and return back to the coast with the tides.\t\xa0\t\tTidal energy is fast becoming an important non conventional source of energy. They are used in the production of electricity along the Gulf of Kutch and in the state of Gujarat.\t\xa0\t\xa0 | |
| 526. |
Mention the main areas of study in soil geography, political geography and environmental geography |
| Answer» | |
| 527. |
Distinguish between foliation and lineation rock |
| Answer» Foliation\xa0is the result of the parallel arrangement of (micas, etc.) in a plane perpendicular to the maximum principal applied stress. A lineation is caused by a similar growth of elongate minerals (eg. hornblende) in this plane. | |
| 528. |
Distinguish between cetaclastic rock and recrystalized rock |
| Answer» | |
| 529. |
Summarize the chapter "Geography as discipline" in 1025 words. |
| Answer» Geography is an integrated discipline.1. Geography and History: The geographical factors have modified the course of history in different parts of the world. Every geographical phenomenon undergoes change through time and can be explained temporarily. The changes in landforms, climate, vegetation, economic activities, occupations and cultural developments have followed a definite historical course.2.Geography and Civics: The core concern of political science is territory, people and sovereignty while political geography is also interested in the study of the state as a spatial unit as well as people and their political behaviour.3. Geography and Economics: Economics deals with basic attributes of the economy such as production, distribution, exchange and consumption. Each of these attributes also has spatial aspects and here comes the role of economic geography to study the spatial aspects of production, distribution, exchange and consumption. | |
| 530. |
What do you mean by mist ?? |
| Answer» a cloud made of very small drops of water in the air just above the ground, that makes it difficult to see<br>Very funny ??<br>Don\'t know | |
| 531. |
What are ocean currents and what are the forces influencing it. |
| Answer» \xa0Factors Influencing Nature and Movement of Ocean Currents:1. Factors related to the earth’s rotation: Gravitational force and force of deflection.2. Factors originating within the sea:\xa0Atmospheric pressure, winds, precipitation, evaporation and insolation.3. Factors originating within the sea: Pressure gradient, temperature difference, salinity, density and melting of ice.4. Factors modifying the ocean currents: Direction and shape of the coast, seasonal variations and bottom topography. | |
| 532. |
What is convectional current theory? |
| Answer» According to this\xa0theory, the intense heat generated by radioactive substances in the mantle (100-2900 km below the earth surface) seeks a path to escape and gives rise to the formation of convection\xa0currents\xa0in the mantle. | |
| 533. |
Geography is a science of integration or synthesis \'Discuss. |
| Answer» Geography is a discipline of synthesis. It attempts spatial synthesis, and history attempts temporal synthesis. Geography as an integrating discipline has an interface with numerous natural and social sciences. All the sciences, whether natural or social, have one basic objective, understanding reality. | |
| 534. |
Explain any three features of metamorphic rocks |
| Answer» \tCataclastic metamorphism occurs along with the tectonic plate faults where the rocks get rubbed with each other which results in the grain size reduction.\tTransformation of these rocks are classified as one which could not form non foliated rock and is of low grade.\tCirculation of rock results in huge number of mineral water chemical reactions which results in different kinds of precious metals and stones. | |
| 535. |
Which of the following layer of earth is also known as sima |
| Answer» Answer: The oceanic crust is layer of earth is also known as simaThe oceanic crust is called ‘sima’. The root of the word sima is ‘si’ from silica and ‘ma’ from magnesium. | |
| 536. |
Write short note of sea floor spreading |
| Answer» • Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.• Seafloor spreading helps explain continental drift in the theory of plate tectonics.• This theory was proposed by Hess in 1961. He argued that constant eruptions at the crest of oceanic ridges cause the rupture of the oceanic crust and the new lava wedges into it, pushing the oceanic crust on either side. Thus,the ocean floor spreads.• The younger age of the oceanic crust as well as the fact that the spreading of one ocean does not cause the shrinking of the other, made Hess think about the consumption of the oceanic crust.• He further maintained that the ocean floor that gets pushed due to volcanic eruptions at the crest, sinks down at the oceanic trenches and gets consumed. | |
| 537. |
Definition of rabi crops |
| Answer» Wheat<br>Rabi crops are known as winter crops. They are grown in October or November. The crops are then harvested in spring. These crops require frequent\xa0irrigation\xa0because these are grown in dry areas. Wheat, gram, barley are some of the rabi crops grown in India.Examples of Rabi CropsFollowing are some of the examples of rabi crops:\tWheat\tBarley\tOats\tPulses\tMustard\tLinseed | |
| 538. |
Short note of metamorphic rock |
| Answer» The\xa0metamorphic rocks\xa0make up a large part of the Earth’s crust and are classified by texture and by chemical and mineral assemblage. They may be formed simply by being deep beneath the Earth’s surface, subjected to high temperatures and the great pressure of the rock layers above it.Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means “change in form”. The original rock is subjected to heat with temperatures greater than 150 to 200°C and pressure around 1500 bars, causing profound physical and/or chemical change.<br>\xa0metamorphic rock\xa0is a type of\xa0rock\xa0which has been changed by extreme heat and pressure.The types of metamorphic rocks depend upon the original rocks that were subjected to metamorphism. Metamorphic rocks are classified into two major types:(i)foliated rocks\xa0(ii)non-foliated rocksFormation of metamorphic rocks : These rocks are formed due to thermal metamorphism.It is of two types :(i)Contact metamorphism: In contact metamorphism the rocks come\xa0into\xa0the contact with hot magma and lava and the rock material is recrystallized under high pressure and temperature.(ii)Regional metamorphism: In regional metamorphism, rocks under go recrystallization due to deformation caused by tectonic shearing together with high temperature or pressure or both. | |
| 539. |
Short note of sedimentary rocks |
| Answer» The\xa0sedimentary rocks\xa0are formed by the deposition and subsequent cementation of that material within bodies of water and at the surface of the earth. The process that causes various organic materials and minerals to settle in a place is termed as sedimentation. Sedimentation may also occur as minerals precipitate from water solution or shells of aquatic creatures settle out of suspension.<br>Sedimentary rocks are types of rock that are formed by the deposition and subsequent cementation of that material at the Earth\'s surface and within bodies of water.\xa0Sedimentary rocks are formed from those materials which are deposited at favourable sites by agents of denudation such as river, wind, glacier and sea waves. The process is called the lithification.The sedimentary rocks are formed in different ways.(i)The layers of deposits : Loose materials or sediments are deposited in the layers.(ii)Stratification : The sediments are deposited in the layers. Materials such as clay, silt, sand, etc. settle down in due course.(iii)Solidification: The loose material gets converted into hard and compact rocks. | |
| 540. |
Short note of igneous rock |
| Answer» \xa0Igneous rock is formed through the cooling and solidification of magma or lava.\xa0Igneous rock\xa0may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.\xa0This magma can be derived from partial melts of existing rocks in either a planet’s mantle or crust. Typically, the melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition.<br>Igneous rocks are those rocks which have been formed by the cooling and solidification of molten natural matter of the earth.The igneous rocks are formed when magma cools and turns into solid forms. The process of the cooling and solidification can happen in the earth\'s crust as well as on the surface.Characteristics of igneous rocks are described below :(i)These rocks do not have particles and layers.(ii)These rocks are compact and massive.(iii)These rocks are crystalline.(iv)The igneous rocks are extremely hard and resistant.(v)These rocks do not possess fossils of plants or animals.(vi)These rocks are thermal in origin. | |
| 541. |
Describe rock cycle |
| Answer» The\xa0rock cycle\xa0is a process in which\xa0rocks\xa0are continuously transformed between the three\xa0rock\xa0types igneous, sedimentary and metamorphic.<br>\xa0Rock CycleThe process of transformation of rocks from one form to\xa0an other\xa0in a cyclic manner is known as the rock cycle. It includes the following processes:\tHot lava cools down to form igneous rocks.\tThese igneous rocks are then broken down into small particles which are transported and then deposited. This results in the formation of sedimentary rocks\tWhen these igneous and sedimentary rocks are subjected to great heat and pressure, they change into metamorphic rocks.\tThese metamorphic rocks under heat and pressure breakdown and\xa0form\xa0hot\xa0lava.\tThis hot magma then again cools down and forms igneous rocks. | |
| 542. |
Write down the major physical characteristics of minerals |
| Answer» Followings are the physical characteristics of minerals:(i)External crystal form — determined by internal arrangement of the molecules — cubes, octahedrons, hexagonal prisms, etc.(ii)Cleavage — tendency to break in given directions producing relatively plane surfaces — result of internal arrangement of the molecules — may\xa0cleave\xa0in one or more directions and at any angle to each other.(iii)Fracture — internal molecular arrangement so complex there are no planes of molecules; the crystal will break in an irregular manner, not along planes of cleavage.(iv)Lustre — appearance of a material without regard to colour; each mineral has a distinctive lustre like metallic, silky, glossy etc.(v)Colour — some minerals have characteristic colour determined by their molecular structure — malachite, azurite, chalcopyrite etc., and some minerals are coloured by impurities. For example, because of\xa0impurities\xa0quartz may be white, green, red, yellow etc.<br>Followings are the physical characteristics of minerals:(i)External crystal form — determined by internal arrangement of the molecules — cubes, octahedrons, hexagonal prisms, etc.(ii)Cleavage — tendency to break in given directions producing relatively plane surfaces — result of internal arrangement of the molecules — may cleave\xa0in one or more directions and at any angle to each other.(iii)Fracture — internal molecular arrangement so complex there are no planes of molecules; the crystal will break in an irregular manner, not along planes of cleavage.(iv)Lustre — appearance of a material without regard to colour; each mineral has a distinctive lustre like metallic, silky, glossy etc.(v)Colour — some minerals have characteristic colour determined by their molecular structure — malachite, azurite, chalcopyrite etc., and some minerals are coloured by impurities. For example, because of\xa0impurities\xa0quartz may be white, green, red, yellow etc. | |
| 543. |
Short note of sea floor spreading |
| Answer» Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.• Seafloor spreading helps explain continental drift in the theory of plate tectonics.• This theory was proposed by Hess in 1961. He argued that constant eruptions at the crest of oceanic ridges cause the rupture of the oceanic crust and the new lava wedges into it, pushing the oceanic crust on either side. Thus,the ocean floor spreads.• The younger age of the oceanic crust as well as the fact that the spreading of one ocean does not cause the shrinking of the other, made Hess think about the consumption of the oceanic crust.• He further maintained that the ocean floor that gets pushed due to volcanic eruptions at the crest, sinks down at the oceanic trenches and gets consumed.<br>SEA FLOOR SPREADING1 .it was proposed by Hess in 19612. he believed that new lava pushes out the plates from the mid-oceanic ridge3. palaeomagnetic studies of the ocean floor reveal thatA. along the mid-oceanic ridge there is an intense volcanic eruptionB. huge amount of lava comes out along the mid-Atlantic ridgesC. the equidistant rock formations have similar age and chemical compositions & magnetic properties7. rocks closer to the mid-oceanic ridges are young and normal polarity8. The age of rocks increases as the distance increases from the mid-oceanic ridge9. Oceanic crust is much younger(200my) than continental crust (3200my)10. The sediments of ocean floor is very thin | |
| 544. |
Write short note of plade boundary |
| Answer» Plate tectonics affects humans in several important ways.\tIt causes earthquakes\tIt causes volcanism\tIt induces recycling of elements within the biosphere and between the geosphere and biosphere\tIt causes mountain-buildingTypes of plate boundaries:Plate Boundaries mainly consists of three types (fourth is a mixed type), formed in the manner the plates shift in relative to each other. These are collectively referred to as surface phenomena of different types. Plate boundaries are of different types, namely:Transform boundaries:These boundaries happen where two lithospheric plates move apart, or maybe further precisely, collide away from one other despite the transform faults, where plates are neither created nor destroyed.Divergent boundaries:These boundaries happen when both plates move\xa0apart from one other.Convergent boundaries:These boundaries happen\xa0where both plates move towards one other to form a zone of subduction or a continental collision. | |
| 545. |
What were the forces suggested by Alfraid Wegener for the movement of the continent |
| Answer» The forces were:(i)Pole fleeing force(ii)Tidal force | |
| 546. |
How are conventional current in the mentle initiated and mentioned |
| Answer» The convectional currents in the mantle are generated due to radioactive elements causing thermal differences in the mantle portion. The currents move in radial direction and develop in cell patterns. | |
| 547. |
Bring about the basic difference between the drift theory and the plate tectonics. |
| Answer» Drift Theory :(i)Continental drift theory by Wegener assumes all the present continents to have arisen by the breaking and then drifting of the components of the Super - continent Pangaea.(ii)Continental drift theory only considers the horizontal movement.(iii)Continental drift theory mostly relies on circumstantial evidences of Jig-Saw-Fit, fossils, place deposits etc.(iv) Continental drift theory relies on the concept of plate tectonics to be validated.Plate Tectonics :(i)Plate Tectonics assumes the whole earth’s lithosphere to be divided into different ‘major’ and ‘minor’ plates which are constantly moving.(ii)Plate tectonics takes into account the subduction of plates also.(iii)Plate tectonics is based on scientific analysis of the processes inside the earth’s surface.(iv)Plate tectonic theory validates the drift theory and is not to be validated by the same. | |
| 548. |
Explain the plate tectonic theory and its mechanism |
| Answer» Plate tectonics is the theory that Earth’s outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. The plates act like a hard and rigid shell compared to Earth’s mantle. This strong outer layer is called the\xa0lithosphere.The earth’s lithosphere is composed of seven or eight major plates and many minor plates. The lithosphere is a rigid outermost shell of earth and is broken up into tectonic plates. When these plates meet, their relative motion determines the type of boundary like convergent, divergent, or transform.Volcanic activity, earthquakes, mountain-building, and oceanic trench formation occur along these plate boundaries. The relative movement of the plates typically ranges from zero to 100 mm annually. | |
| 549. |
Distinguish between convergent and divergent played boundaries |
| Answer» Convergent boundary1.When two plates move towards each other they are called converging.2.Convergence of two plate boundaries leads to the folding of land and formation of mountains.3.When they converge, subduction takes place and lithosphere is being consumed.Hence it is also called as destructive plate boundaries.Divergent boundary1.When two plates move away from each other they are called diverging.2.Divergence of two plate boundaries causes the fracture in landforms.3.When they diverge, new lithosphere is being formed by accretion.Hence it is also called as constructive plate boundaries.. | |
| 550. |
Indus water drainage system map work |
| Answer» | |