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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.

1, 2 only.
2 only.
3 only.
All the above.
Explanation:
Divergent plate boundary or constructive plate boundary:A tectonic boundary where two plates are moving away from each other and new crust isforming from magma that rises to the Earths surface between the two plates. The middle ofthe Red Sea and the mid-ocean ridge (running the length of the Atlantic Ocean) aredivergent plate boundaries.Convergent plate boundary or destructive plate boundary:It is a tectonic boundary where two plates move towards each other. If thetwo plates are ofequal density, they usually push up against each other,forming a mountain chain. If they areof unequal density, one plate usually sinks beneath the other in a subduction zone.The western coast of SouthAmerica and the Himalayan Mountains are convergent plate boundaries. Also called active margin , collision zone.Transform plate boundary:Transform plate boundary is one in which two plates slide past one another thus neithercreating nor destroying continental landmass.
Additional Questions

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.

Answer

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.

Answer

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.

Answer

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.

Answer

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?

Answer

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.

Answer

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.

Answer

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.

Answer

Consider the following
1. These clouds are one of the highest clouds in the atmosphere
2. They are also called thunderheads and produce rains, thunder and lightning
Select the correct answer based on above statements

Answer

Generally the incoming Solar radiations are absorbed, scattered and reflected in the
atmosphere. Based on the above statement which of the following is/are correctly
matched?
1) Clouds --- reflection.
2) Atmospheric gases --- scattering.
3) Dust particles, haze --- absorption.
Choose the correct code from the codes below.

Answer
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