ICSE Class 9 Structure of the Earth — practice questions
20 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice ICSE Class 9 Structure of the Earth in the app →An earthquake is caused by the release of energy along a:The point where an earthquake's energy is released is called the:The surface point directly above the focus is the:The instrument that records earthquake waves is the:The most easily available direct source of earth material is:Gold mines in South Africa reach depths of about:Mines cannot go much deeper than 4 km mainly because:The deepest drilling project so far is at:P-waves are similar in character to:S-waves can travel only through:Which waves are considered the most damaging?The last waves to report on the seismograph are the:The shadow zone of P-waves appears as a band between:The zone beyond 105 degrees from the epicentre does not receive:The S-wave shadow zone covers about what share of the earth's surface?Reflection of earthquake waves makes them:Refraction of earthquake waves happens when they:S-waves vibrate perpendicular to their direction in the vertical plane, creating:Gravity readings that differ from expected values are called:Which of these is an INDIRECT source of knowledge about the interior?