Current Affairs

GK MCQs Section
Q. Consider the following statements regarding the asthenosphere:
  1. Asthenosphere is a part of the Earth's outermost crust.
  2. It is located just below the lithosphere, within the upper mantle.
  3. It is comparatively ductile and partially molten, allowing tectonic plates to move above it.
Which of the above statements are correct?
Answer: Only 2 and 3
Notes: Statement 1 is incorrect as asthenosphere is not part of the outermost crust, but of the upper mantle beneath the lithosphere. Statements 2 and 3 are correct: asthenosphere lies just below the lithosphere, is ductile and partially molten, and enables plate tectonics through its plasticity and mantle convection.
Question Source: 📚This question has been sourced from GKToday's Target UPSC Prelims for 2026, 2027 & 2028 App Exclusive Course in GKToday Android Application which provides more than 12K Topicwise UPSC Prelims General Studies questions with explanations framed on UPSC pattern. Download the app here.
📌 Question Number: 66 in 45: Earth Structure and Geology in the above course in App.