Geography-Interior of the Earth 1

   August 8, 2022
1. Evidence of multiple advances and retreats of glaciers, and the sediment deposits in glacial lakes reveals
  1.  The occurrence of warm and cold periods in the history of Earth
  2.  Repeated attacks of permafrost on the glacial moraines over centuries
Which of the above is/are correct?
2. Consider the following statements:
  1.  The gravitation force (g) is not the same at different latitudes on the surface of the Earth.
  2. Uneven distribution of mass of material within the Earth influences the gravitational force as experienced within the Earth.
Which of the above is/are correct?
3. Which of the following sources helps in studying about the interior of the Earth?
  1.  Meteors that at times reach the Earth
  2.  Gravitation
  3. Magnetic field
  4. Seismic activity
Select the correct answer using the codes below:
4. Most of the Earth’s iron is stored in
5. Consider the following statements:
  1.  The crust is richer in silicon than it is in oxygen and iron.
  2.  The crust is relatively enriched in less dense compounds and relatively depleted in iron compared to the rest of the Earth.
Which of the above is/are correct?
6. What is the principal difference between the average chemistry of the crust and the average chemistry of Earth as a whole?
7. Arrange the following elements in the Earth’s crust in decreasing order of their abundance:
  1. Silicon
  2.  Iron
  3. Magnesium
Choose the correct answer using the codes below:
8. The cooler crust aside, the temperature on Earth tends to increase as we dig inwards. The retained heat on Earth can be attributed to which of the following phenomena?
  1.  Frictional heating of Earth’s material facilitated by gravitation
  2.  Heat from the decay of radioactive elements
Which of the above is/are correct?
9. The primary source of Earth’s heat is a combination of
10. The iron catastrophe was a postulated major event early in the history of Earth. It refers to