This is the scale used to measure the size of volcanic eruptions –

  • Richter Scale
  • Volcanic Explosivity Index
  • Volcano Eruptivity Scale
  • None of the above
  • Volcanic Explosivity Index
The Earth is an oblate spheroid and not a perfect sphere. This is because :
  • The Earth has a rotational motion and the rotational speed increases as one goes from the Poles towards the Equator.
  • The Equator experiences greater gravitional pull from the Sun.