alleryStart learning →Refraction of earthquake waves happens when they:
ACross materials of different densities
BReach the open air far above
CMeet another earthquake's waves
DSlow down deep inside a mine
Answer & Solution
Correct answer: A. Cross materials of different densities
1. Wave direction and velocity change with the medium.
2. Crossing materials with different densities bends them.
3. That bending is refraction.
_Source: syllabus Geography, Ch 3 'Interior of the Earth' (kegy203)_
Keep practising Structure of the Earth
Browse all Structure of the Earth questions for ICSE Class 9, or explore more Geography topics.
Related questions
Which of these is an INDIRECT source of knowledge about the interior?Gravity readings that differ from expected values are called:S-waves vibrate perpendicular to their direction in the vertical plane, creating:Reflection of earthquake waves makes them:The S-wave shadow zone covers about what share of the earth's surface?The zone beyond 105 degrees from the epicentre does not receive:The shadow zone of P-waves appears as a band between:The last waves to report on the seismograph are the: