1.
2.
2. Answer the following questions in brief.
What is an earthquake?
State any three of the 'damaging effects' of an earthquake.
3.
Explain the phenomenon of production of shock waves.
In the context of an earthquake, which of the two points: the focus or the
epicenter, is deep under the ground?
5.
Name the scale used for measuring the strength of an earthquake. Write the
likely magnitude of (a) a mild earthquake (b) a highly destructive earthquake
on this scale.
6. An earthquake measures 3 on Richter Scale.
(a) Would it be recorded on the seismometer?
(b) Is it likely to cause much damage?
Answers
Answer = An earthquake is what happens when two blocks of the earth suddenly slip past ... the location directly above it on the surface of the earth is called the epicenter. ... earthquakes that occur afterwards in the same place as the mainshock. ... a measuring tape since faults are many kilometers deep beneath the earth's surface sorrry if wrong
Answer:
1. An earthquake is the sudden movement of the Earth's tectonic plates, resulting in shaking of the ground.
2.The primary effects of earthquakes are ground shaking, ground rupture, landslides, tsunamis, and liquefaction. Fires are probably the single most important secondary effect of earthquakes.
3.Shock waves are formed when a pressure front moves at supersonic speeds and pushes on the surrounding air. ... Over longer distances, a shock wave can change from a nonlinear wave into a linear wave, degenerating into a conventional sound wave as it heats the air and loses energy.
4. Earthquake focus is deep below the ground and here the earthquake lies over the surface of earth which is directly above. On the other hand epicentrum in seismology is at the point on the earth surface directly above the hypocenter.
5. The scale used to measure the strength of an earthquake is RICHTER scale. The likely magnitude of mild earthquake is 3.5magnitude. The likely magnitude of a highly destructive earthquake is 9.5magnitude.
6. The destructive energy of an earthquake is measured by the Richter scale. ... The reading of magnitude 3 on the Richter scale would be recorded by a seismograph. If the Richter scale gives a reading of magnitude 3, then the earthquake is not likely to cause much damage.
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