Geography · General Awareness

Geology and Earth Structure

1,268 Questions

Geology and Earth Structure explores the physical composition of the planet, including its layers, tectonic plates, and seismic activity. This topic is a core component of geography and general science sections in various competitive exams. Reviewing these concepts builds a solid foundation for answering questions related to natural phenomena.

Layers of the EarthTectonic PlatesEarthquakes and VolcanoesGeomagnetism ApplicationsGeophysical MethodsLandform Formation

Geology and Earth Structure Questions

Multiple choice

Which of the following is not true regarding the mantle?

  1. Earth's mantle extends to a depth of almost 2900 km.

  2. It is the thickest layer of Earth.

  3. It is composed of silicate rocks that are rich in iron and magnesium.

  4. All of the given statements are true.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The mantle extends to 2900 km, is the thickest layer, and is composed of silicate rocks rich in iron and magnesium. All statements are correct.

Multiple choice

Following relief zones are the characteristics of ocean basins:

  1. Continental slope
  2. Continental shell
  3. Deep sea plain
  4. Oceanic trench

The correct sequence of their seaward appearance from the coasts is

  1. 1, 2, 4, 3

  2. 2, 1, 4, 3

  3. 1, 2, 3, 4

  4. 2, 1, 3, 4
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The correct sequence of their seaward appearance from the coasts is Continental shelf, Continental slope, Deep sea plain and Oceanic trench. The oceanic trenches are hemispheric-scale long, but narrow topographic depressions of the sea floor. They are also the deepest parts of the ocean floor. A continental slope is the seaward border of continental shelf. A deep sea plain is a broad, almost level area forming the predominant portion of the ocean floor. 

Multiple choice

'Plate Tectonics' refers to movement of large sections of Earth's crust. Which of the following factors is 'Not' responsible for this movement?

  1. Diatrophism

  2. Continental Drift

  3. Sea floor spreading

  4. Polar Wandering
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plate tectonics is driven by mantle convection, sea floor spreading, and continental drift. Polar wandering is a phenomenon where the magnetic poles appear to move, but it is not a driver of crustal plate movement.

Multiple choice

Consider the following statements associated with the Deccan Traps:

  1. From the Cretaceous to the Eocene, intense volcanic activity took place in Peninsular India.
  2. The volcanic lava spread out horizontal sheets, filling the irregularities of the pre-existing topography.
  3. The trap country is characterized by conical hills and extensive flat surfaces. Of these statements:

  1. 1 and 2 are correct

  2. 1, 2 and 3 are correct

  3. 2 and 3 are correct

  4. 1 and 3 are correct
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Deccan Traps formed during the Cretaceous-Eocene period due to volcanic activity (1). The lava flows were horizontal (2). Statement 3 is incorrect because the trap country is characterized by flat-topped hills (mesas/buttes), not conical hills.

Multiple choice

What does the Richter scale measure?

  1. Earthquakes

  2. Tornadoes

  3. Distance

  4. Weight
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Richter scale is a logarithmic scale used to quantify the magnitude of an earthquake. It measures the energy released by the seismic event.

Multiple choice

The outermost layer of the Earth is the...

  1. Outer Core

  2. Crust

  3. Inner Core

  4. Mantle
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Earth is composed of layers, with the crust being the thin, outermost solid shell. Beneath it lie the mantle and the core.

Multiple choice geography biosphere and landscape introduction to earth's landform development of landforms major landforms of the earth

Which of the following land form is different from three others on the basis of mode of origin?

  1. Anticline

  2. Fold

  3. Rift Valley

  4. Nappe
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Rift Valley, in terms of the theory of plate tectonics, occur in divergence zones were two of the various lithospheric plates that make up the Earth’s surface are separating. Numerous submarine rift valleys have been discovered along the crests of the large ridges that run throughout the Earth’s oceans. These ridges are centers of seafloor spreading: areas where the magma from the mantle is welling up, cooling to form the new oceanic crust, and is moving away from the crests in either direction.

Multiple choice geography biosphere and landscape introduction to earth's landform development of landforms major landforms of the earth

Which valley is formed as a result of tectonic forces?

  1. 'V'-shaped valley

  2. 'U'-shaped valley

  3. Hanging valley

  4. Rift valley
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rift Valley, in terms of the theory of plate tectonics, occur in divergence zones where two of the various lithospheric plates that make up the Earth’s surface are separating. Numerous submarine rift valleys have been discovered along the crests of the large ridges that run throughout the Earth’s oceans. These ridges are centres of seafloor spreading: areas where magma from the mantle is welling up, cooling to form new oceanic crust, and is moving away from the crests in either direction.