Lithosphere MCQ Question and Answer | Geography MCQ Question

The best representative of the acid igneous rocks is Granite. A good example of intrusive igneous rock is granite. Acidic rocks are light in color and basic rocks are dark in color. (Persilicic is a little-used term equivalent to acidic as applied to igneous rocks). Among the volcanic rocks, rhyolite, obsidian, and acidic tuff are the predominant representatives; among the deep-seated rocks, granite and granodiorite are most common.

Metamorphism is a process in which a rock recrystallises due to intense heat and pressure. Shale is sedimentary rock which metamorphoses into slate.

Shale is metamorphosed into slate. When shale goes through high temperature & pressure during regional metamorphism it becomes slate.

When Igneous rocks contain high proportion of silica, they are acidic. Acid igneous rocks such as granite are less dense and have lighter colour than basic igneous rocks.

Crater is the cup shaped mouth of volcanoes. Whenever any volcano erupts material from the top of the cone is blown off or collapses into vent which widens the vent and this widened vent is called crater or caldera.

The cause of earthquake is disturbances in Earth surface. An Earthquake occurs when seismic waves are generated due to the release of energy from Earth's interior causing tremors Earth's surface.

Tsunamis are destructive sea waves which are generated due to Earthquakes on sea floors whereas tides are generated due to gravitational pull of Moon and Sun.

The Rift Valley is created between two rifts. When Earth's crust cracks, faulting takes place due, to tension or compression and a section of it subside or rise above the surrounding level. The subsided part between two blocks is called rift valley.

Of the floating iceberg in sea the portion remaining above the sea level is 1/10th. The floating iceberg portion that remains above the sea level is called hummock, however in simpler language it is known as the tip.

The headland in sea is called Peninsula. A peninsula is a landform which is surrounded by water from three sides. It appears that it is protruding into the sea. Indian peninsula is a headland into the Indian Ocean.