Advertisements
Advertisements
Question
Give reasons for the following:
Earth’s movements have modified the Earth’s surface.
Advertisements
Solution
The surface of the earth is undergoing constant change. Some of these changes take place all of a sudden as in the case of volcanic eruptions and earthquakes but most of them are gradual and slow. Due to these changes, the sediments which were originally deposited in horizontal layers are found tilted bent broken and twisted. In certain regions, the structures which were once at sea-level in the Baltic Sea are now well above the water. Recently it has been found that the larger part of the coast of Scandinavia is rising relative to sea-level but that of the Southern extremity is sinking. Along some coasts, submerged forests and various human structures show that the land has not only risen but at places, it has also submerged. All this has happened or is happening due to the Earth’s movements. Thus we find that the Earth’s movements have modified the Earth’s surface.
RELATED QUESTIONS
What are ‘Volcanoes’?
What is‘magma’?
What is the following:
Caldera
Distinguish between the following pair of terms associated with vulcanicity:
Laccolith and Lapolith
Answer the following
The vent of a volcano when blocked results in an explosive eruption.
Name one useful feature of vulcanicity other than soil fertility.
Out of the following words write down the four that are connected with volcanic activity.
Karst, crater, drumlin, stalactites, gully, pot holes, ash, basalt, swallow holes, dyke, domes, bluffs.
______ belt is known as the “Ring of Fire”.
Assertion (A): The Pacific Ocean includes two thirds of the world’s volcanoes.
Reason (R): The boundary along the Eastern and Western coast areas of the Pacific Ocean is known as the Pacific Ring of Fire.
Choose the odd one
Vesuvius, Stromboli, St.Helena, Etna.
