Core Concept Summary
Module 1: Earth Internal Structure & Tectonics
The Earth consists of three concentric layers: Crust, Mantle, and Core. Plate tectonics explains the dynamics of the lithosphere over the asthenosphere, leading to convergent, divergent, and transform boundaries.
Module Evaluation
5-Question Knowledge Check
Score: 0 / 5
Q1. The seismic boundary separating the Crust and Mantle is the:
Solution: The Moho discontinuity marks the boundary between the crust and upper mantle.
Q2. Which seismic waves are compressional and travel through all states of matter?
Solution: Primary (P) waves are longitudinal and travel fastest through solids, liquids, and gases.
Q3. The Pacific "Ring of Fire" is formed due to:
Solution: The Pacific rim features convergent plate boundaries causing frequent volcanism.
Q4. Which mountain range in India is an ancient relict fold mountain?
Solution: The Aravallis are one of the oldest fold mountain systems in the world.
Q5. Mid-oceanic ridges are formed along which tectonic boundary?
Solution: Divergent boundaries pull oceanic plates apart, allowing magma upwelling.