What Best Describes The Movement Of P Waves?

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What Best Describes The Movement Of P Waves??

P waves slow down and refract at the boundary between the mantle and the outer core. and S waves do not travel through the outer core.P waves slow down and refract at the boundary between the mantle and the outer core

outer core
Earth’s outer core is a fluid layer about 2 400 km (1 500 mi) thick and composed of mostly iron and nickel that lies above Earth’s solid inner core and below its mantle. Its outer boundary lies 2 890 km (1 800 mi) beneath Earth’s surface. … Unlike the inner (or solid) core the outer core is liquid.

What kind of movement is produced by P waves?

Seismic P waves are also called compressional or longitudinal waves they compress and expand (oscillate) the ground back and forth in the direction of travel like sound waves that move back and forth as the waves travel from source to receiver.

What set of characteristics best describes a P wave?

P Waves are compressional which means they move through (compress) a solid or liquid by pushing or pulling similar to the way sound travels through the air. The particles of the material a P Wave pushes through move in the direction of the P wave’s energy. This is called the direction of wave propagation.

Which of the following is a characteristic of P waves quizlet?

Which of the following is a characteristic of P-waves? They compress and then expand the rock in the direction the wave travels.

Which characteristics best describe S waves?

S waves are transverse waves meaning that the direction of particle motion of a S wave is perpendicular to the direction of wave propagation and the main restoring force comes from shear stress.

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How does P waves move?

P waves travel through rock the same way that sound waves do through air. That is they move as pressure waves. When a pressure wave passes a certain point the material it is passing through moves forward then back along the same path that the wave is traveling. P waves can travel through solids liquids and gases.

What do P waves do?

In P or compressional waves the vibration of the rock is in the direction of propagation. P waves travel fastest and are the first to arrive from the earthquake. In S or shear waves rock oscillates perpendicular to the direction of wave propagation.

How do you describe P waves?

A P wave or compressional wave is a seismic body wave that shakes the ground back and forth in the same direction and the opposite direction as the direction the wave is moving.

What are two characteristics of P wave?

P waves or Primary waves are the first waves to arrive at a seismograph. P waves are the fastest seismic waves and can move through solid liquid or gas. They leave behind a trail of compressions and rarefactions on the medium they move through. P waves are also called pressure waves for this reason.

What does P in P wave stand for?

primary
Compressional waves are also called P-Waves (P stands for “primary”) because they are always the first to arrive. … Shear waves propagate more slowly through the Earth than compressional waves and arrive second hence their name S- or secondary waves.Sep 10 2008

What are the differences between P waves S waves and surface waves?

P waves can travel through solids liquids and even gases. … Unlike P waves S waves can travel only through solid materials. After both P and S waves have moved through the body of Earth they are followed by surface waves which travel along Earth’s surface. Surface waves travel only through solid media.

What best describes a seismic wave?

Seismic waves are waves of energy that travel through Earth’s layers and are a result of earthquakes volcanic eruptions magma movement large landslides and large man-made explosions that give out low-frequency acoustic energy.

Which of the following best describes how scientists study the interior of the earth?

Which of the following best describes how scientists study the interior of the Earth? Scientists use seismic waves gravity and magnetism to study the Earth’s interior.

Which set of waves are the P waves?

Primary waves also known as P waves or pressure waves are longitudinal compression waves similar to the motion of a slinky (SF Fig. 7.1 A). Secondary waves or S waves are slower than P waves.

Are P waves longitudinal?

The P seismic waves travel as elastic motions at the highest speeds. They are longitudinal waves that can be transmitted by both solid and liquid materials in the Earth’s interior.

Where do P waves originate?

The P wave is a summation wave generated by the depolarization front as it transits the atria. Normally the right atrium depolarizes slightly earlier than left atrium since the depolarization wave originates in the sinoatrial node in the high right atrium and then travels to and through the left atrium.

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Do P waves move horizontally or vertically?

The different particle motion style is because each seismic wave has its characteristic movement: P waves are compressive and travel upward through the body of the earth so have a strong vertical component.

Do P waves move parallel or perpendicular?

The P wave propagates at ~6 km/sec in rock with particle motions that are parallel to the direction of propagation. The S wave is slower at 4 km/sec and propagates with particle motions that are perpendicular to the direction of propagation.

What are P waves quizlet?

P waves. the first wave that reaches the location. It is the quickest but does not cause much damage. This wave causes the rocks the move back and forth. This wave can go through both solids and liquids.

How do you describe P wave morphology?

The normal P wave morphology is upright in leads I II and aVF but it is inverted in lead aVR. The P wave is typically biphasic in lead V1 (positive-negative) but when the negative terminal component of the P wave exceeds 0.04 seconds in duration (equivalent to one small box) it is abnormal.

What does P wave inversion mean?

If the P wave is inverted it is most likely an ectopic atrial rhythm not originating from the sinus node. Altered P wave morphology is seen in left or right atrial enlargement. The PTa segment can be used to diagnose pericarditis or atrial infarction.

Why do P-waves move faster than S waves?

P-waves and S-waves are body waves that propagate through the planet. P-waves travel 60% faster than S-waves on average because the interior of the Earth does not react the same way to both of them. … The energy is thus less easily transmitted through the medium and S-waves are slower.

How would you describe the behavior of AP Wave?

P-waves are predominantly compressional waves. As a P-wave passes material compresses in the same direction the wave is moving and then extends back to its original thickness once the wave has passed.

What is the best description of the paths of S waves and P waves?

What is the best description of the paths of S waves and P waves? S waves travel through solids or very dense glassy liquids. P waves travel through solids liquids and gasses.

How does the movement of the ground due to P waves and S waves differ from the movement of waves you created with the Slinky?

This is how P waves travel through the earth moving it back and forth. An earthquake also causes secondary or shear waves called S waves. These travel at about half the speed of P waves but can be much more destructive. S waves move the earth perpendicularly to the direction the wave is traveling.

What is the relationship between P waves and S waves?

What is P and S waves? P-waves are compression waves that apply a force in the direction of propagation. On the other hand S-waves are shear waves which means that the motion of the medium is perpendicular to the direction of propagation of the wave.

What can you say about the P waves and S waves in the illustration?

S waves travel by particles trying to slide past each other similar to when one shakes a rope up and down or from side to side. P waves can travel through solid and fluid materials S waves can only travel through solids. P waves travel faster than S waves.

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Why are there no P waves or S waves?

Why are there no p-waves or s-waves received in the p-wave shadow zone. A. P-waves are absorbed and S- waves are reflected refracted by earths outer core. … Both the P-waves and S-waves are refracted by earths outer core.

What do scientists use to study the interior of the Earth?

Scientists use information from seismic waves to understand what makes up the Earth’s interior. The properties of seismic waves allow scientists to understand the composition of Earth’s interior.

How seismic waves are used to describe the interior of the Earth?

Seismic waves tell us that the Earth’s interior consists of a series of concentric shells with a thin outer crust a mantle a liquid outer core and a solid inner core. P waves meaning primary waves travel fastest and thus arrive first at seismic stations. The S or secondary waves arrive after the P waves.

What happens to the P waves when they are approaching the molten part of Earth’s interior?

Molten areas within the Earth slow down P waves and stop S waves because their shearing motion cannot be transmitted through a liquid. Partially molten areas may slow down the P waves and attenuate or weaken S waves.

What is P wave velocity?

Compressional or P-wave velocity (primary wave) measurements are a measure of the velocity of sound waves through Earth materials with distance vs. … P-wave velocity varies with the lithology porosity and bulk density of the material state of stress such as lithostatic pressure and fabric or degree of fracturing.

Can P-waves travel through the inner core?

P-waves speed up again through the inner core and S-waves also travel through it suggesting that the inner core is composed of solid iron and nickel. 3. Figure 19.10: The increase of temperature with depth in the earth is indicated by a curve called the geotherm.

Why do P-waves travel through solids and liquids?

P-waves travel through liquids and gases as well as through solids. Although liquids and gases have zero rigidity they have compressibility which enables them to transmit P-waves.

Why is it called the P wave?

A P wave (primary wave or pressure wave) is one of the two main types of elastic body waves called seismic waves in seismology. P waves travel faster than other seismic waves and hence are the first signal from an earthquake to arrive at any affected location or at a seismograph.

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