EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a drill that goes to the center
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Seismic waves from earthquakes
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maps that previous scientists left
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use of robots to travel to the center
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Detailed explanation-1: -P waves can travel through liquid and solids and gases, while S waves only travel through solids. Scientists use this information to help them determine the structure of Earth . For example, if an earthquake occurs on one side of Earth, seismometers around the globe can measure the resulting S and P waves.
Detailed explanation-2: -Scientists can tell by observing the seismic waves that are recorded all over the surface of the earth from distant earthquakes. The seismic waves are reflected (bounced off) layers of different density, and they are refracted (bent) when they enter layers of different density.
Detailed explanation-3: -Seismologists study earthquakes by looking at the damage that was caused and by using seismometers. A seismometer is an instrument that records the shaking of the Earth’s surface caused by seismic waves. The term seismograph usually refers to the combined seismometer and recording device.