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Continental Drift theory by Wegener changed the perceptions about the Earth’s crust.
Consider the statements regarding this theory.
1) Sialic masses used to float over the Sima without any resistance being offered by Sima.
2) Earlier all land masses were united to form a massive landmass known as ‘Panthalasa’.
3) Ocean floors were considered to be stable and never moved.
Choose the correct statement/s from the following.
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Answer
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Consider the statements regarding different types of plates in ‘Plate Tectonic Theory’.
1) Destructive plate boundary is one in which continuous upwelling of molten material ie lava takes place.
2) Divergent plate boundary is one which two plates slide past one another thus neither creating nor destroying continental landmass.
3) Convergent plate boundary is one in which one plate overrides the other plate.
Choose the correct statement/s from the following code.
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Answer
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Consider the statements regarding earthquake (seismology).
1) Primary waves are analogous to sound waves and it can travel through liquid medium.
2) Secondary waves are analogous to water ripples and it cannot pass through liquid medium.
3) Surface waves are most destructive and slowest among the three waves (primary, secondary, surface waves).
Choose the incorrect statement/s from the following codes.
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Answer
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Consider the statements regarding volcanoes.
1) More than 95% of the global volcanoes are along the plate boundaries.
2) High intensity volcano types like Visuvius type, Peelean type etc are concentrated in the convergent plate boundaries.
3) Low intensity volcano like Mid Atlantic Ridge are concentrated in the divergent plate boundary regions.
Choose the correct statement/s from the following codes.
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Answer
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Every relief can be classified into different types of reliefs.
Match the following.
1) 1st Order relief --- continental plates.
2) 2nd Order relief --- plains and deltas.
3) 3rd Order relief --- fold mountains.
Choose the correctly matched pair from the following codes.
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In Tamil Nadu region, evergreen forests are found despite hot and dry summers with temperature of about 28 degree Celsius.
What is/are the reason/s?October to December.
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In which part of the ocean does the typical example of reversal of ocean current can be observed which is guided by the planetary wind system?
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Mass wasting or mass movement is a common phenomenon at the foothills of big,steep mountains like Himalayas, Atlas etc.
Consider the following statements regarding mass wasting.
1) Rock debris that moves down the hill is mainly derived from weathering.
2) The rock debris moves down mainly because of earthquake, volcano, moving water etc.
Choose the correct statement/s from the following codes.
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Answer
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Arcuate deltas are the most common type of deltas, example being Ganga delta, Rhine delta, Nile delta etc.
Consider the following statements regarding this type of delta.
1) It is formed when river water is denser than sea water.
2) It is formed when river water is as dense as sea water.
3) It is known as growing delta.
Choose the correct statement/s from the following codes.
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Answer
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The atmosphere is a gaseous envelope which surrounds Earth’s surface.
Consider the following statements regarding the Earth’s atmosphere.
1) Rotation of Earth helps in binding of atmosphere to Earth’s surface.
2) It sustains life on the Earth by not allowing Earth to become too hot or too cold.
3) Content of water vapour increases from the equator towards the poles.
Choose the correct statement/s from the following code.
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