Instructions Explain how scientists used seismic waves to determine the internal structure of the Earth. Seismic waves generated in Earths interior provide images that help us to better understand the pattern of mantle convection that drives plate motions.
Earth S Structure And Schematic Picture Of Travelling Seismic Waves Download Scientific Diagram
When an earthquake occurs both S and P waves radiate from the focus.
. Seismic stations located at increasing distances from the earthquake epicenter will record seismic waves that have traveled through increasing depths in the Earth. But geologists use seismic earthquake waves to determine the depths of layers of molten and semi-molten material within Earth. They can cause damage to structures on the Earths surface as well as tsunamis.
This is done by determining the depths of the layers of molten and semi molten material within Earth. Seismic Waves and the Earths Structure Seismic waves also tell us a great deal about the core. 1Explain how earth acquired its layered structure.
Seismic Rays in the Earth 2 e v a w y r a m i r PP K P wave through outer core I P wave through inner core P Abbreviation for PKP PP Reflected P wave with 2 legs pP P wave with leg from focus to surface SP S wave reflected as P wave S Secondary wave J S wave through inner core SSS Reflected S wave with 3 legs sS S wave with leg from focus to surface. These energy waves travel through the Earth in the same way as sound waves travel through the air. P seismic waves travel at the fastest speeds as elastic motions.
2Describe how seismic waves are used to probe earths interior. Describe the three main types of volcanoes in terms of magma composition viscosity silica content rock types eruption style and tectonic setting. The diÞering sensitivities of the oscillation modes are used to reßne models of the Earths internal structure.
Surface waves are analogous to water waves and travel along the Earths surface. The longest period lowest order modes penetrate the core whereas higher order modes mainly sample the mantle. Seismic Waves and Earths Interior When you look at a seismogram the wiggles you see are an indication that the ground is being or was vibrated by seismic waves.
The basic structure of Earths interior as inferred from studies of the energy released by earthquakes which travel through Earth as seismic waves. Explain how Earth acquired its layered structure and briefly describe how seismic waves are used to probe Earths interior. Earth Science 1 Answer SCooke Mar 5 2016 The waves make a picture of the different types of materials showing layers of different rocks and liquids.
Seismic waves travel at different speeds when they pass through different types of material so by studying seismograms scientists can learn a lot about Earths internal structure. Seismic waves are propagating vibrations that carry energy from the source of the shaking outward in all directions. When an earthquake occurs the seismic waves P and S waves spread out in all directions through the Earths interior.
They travel slower than body waves. Seismic velocities depend on the material. Earth Sciences Explain how scientists used seismic waves to determine the internal structure of the Earth.
The study of seismic waves provides evidence for the internal structure of the Earth which otherwise cannot be observed directly. A surface wave is a seismic seismic wave that is trapped near the surface of the earth. Seismic waves reveal the interior of Earths structure.
Because of their low frequency long duration and large amplitude they can be the most destructive type of seismic wave. Seismic waves generated in Earths interior provide images that help us to better understand the pattern of mantle convection that drives plate motions. The structure of Earths deep interior cannot be studied directly.
Even though the technology does not exist to travel into all of Earths layers scientists can still learn a great deal about Earths structure through seismic waves. Seismic waves are produced by earthquakes in the Earths crust. The layered internal structure of Earth developed due to gravitational sorting of Earth materials early in the history of the planet.
This energy is reflected and refracted at boundaries that separate regions of different materials. Describe the three main types of volcanoes in terms of magma composition viscosity silica content rock types eruption style and tectonic setting. 4describe the process of heat transfer that operate with in earths interior and where each of these processes dominates.
Seismic waves are vibrations in the earth that transmit energy and occur during seismic activity such as earthquakes volcanic eruptions and even man-made explosions. Seismic waves which are the same instrument used to investigate earthquakes are routinely utilized to look for oil and natural gas deep beneath the surface of the Earth. Recall that P waves can travel through liquids whereas S waves cannot.
Because different types of earthquake waves behave differently when they encounter material in different states for example. How do seismic waves help scientists understand Earths interior. The periods of the Earths free oscillations depend on the elastic moduli and densities of the interior.
Seismic and the Earths Structure. 3 list and describe each of the layer of earth interior.
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