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Under the pressure and temperature conditions of the Earth's mantle, minerals can (very slowly) be deformed without cracking. This is called ductile deformation. A lot of the deformation in mantle rocks is accomplished by this mechanism.
The ultimate cause for the asthenosphere to move is the gradient of temperature between the core and the surface that drives mantle convection. Hot material moves up from the lower portions of the mantle and cold material sinks down.
What else can I help you with?
Electromagnetic waves slow down or change direction?
Electromagnetic waves do not slow down in a vacuum. However, they can change direction when they encounter different mediums, such as transitioning from air to glass. This change in direction is known as refraction.
How are seismic waves change as they pass through soft soils?
Seismic waves passing through soft soils typically experience increased attenuation and dispersion compared to passing through harder materials. This leads to a reduction in the wave velocity and an increase in the wave amplitude as they travel through the softer soil layers.
When light waves slow down do they change direction?
When light waves slow down as they travel from one medium to another, such as from air to glass, they do change direction. This change in direction is called refraction and occurs due to the change in speed of the light waves in the new medium.
What happens when waves slow down and change direction?
When waves slow down and change direction, it typically means they are entering a medium with a different density or refractive index. This can lead to the waves bending or refracting as they pass from one medium to another. This phenomenon is known as refraction and is commonly seen when waves pass through water or glass.
Why do electromagnetic wave travel fastest through a vacuum?
Electromagnetic waves travel fastest through a vacuum because there are no particles in a vacuum to slow them down. In other mediums, such as air or water, the waves interact with particles which can cause interference and slow down their speed.
About the asthenosphere?
The asthenosphere has the ability to slow down seismic waves. Is not made up of earths plates that would be the lithosphere.
Evidence of convection currents within the asthenosphere comes from?
seismic imaging and plate motion studies. Seismic waves bend and slow down as they pass through the asthenosphere, suggesting it is semi-molten and capable of flow. Plate motion studies show how convection currents in the asthenosphere drive the movement of tectonic plates on the Earth's surface.
How are seismic waves changed as they pass soft soils?
When the waves pass through soft soils (sediments) they slow down and amplify.
How are seismic waves changes they pass through soft soils?
When the waves pass through soft soils (sediments) they slow down and amplify.
The part of the Earth that stops or slows down seismic waves?
The outer core is the part of the Earth that slows down or stops seismic waves due to the change in density and composition from the mantle. Seismic waves travel faster through solid materials like the mantle and crust, but slow down when they reach the liquid outer core.
Which layer of the earth is the place where earthquake waves unexpectedly slow down?
Direct Answer: AsthenosphereExplained Answer: Earthquake waves normally go faster with increasing depth. However, below the lithosphere, the upper mantle contains a curious layer in which earthquake waves unexpectedly slow down. Geologists call this layer the asthenosphere.
What causes seismic waves to change speeds as they move through earths layers?
Seismic waves change speeds as they move through Earth's layers due to differences in the physical properties of the materials in each layer. Factors such as density, rigidity, and composition of the rock can affect how fast seismic waves travel through them. The waves can speed up, slow down, or change direction as they encounter different materials with varying properties.
Why do P waves travel faster through the lithosphere than through the asthenosphere?
P waves travel faster through the lithosphere because it is denser and more rigid, allowing the waves to propagate more efficiently. The asthenosphere, on the other hand, is less dense and more ductile, causing P waves to slow down as they encounter less resistance.
The shadow zone exists due to the of seismic waves?
The shadow zone is formed due to the bending of seismic waves as they pass through the Earth's outer core, which is made of liquid iron. P-waves slow down and refract in the outer core, causing a gap in their detection on the opposite side of the Earth. S-waves do not travel through the liquid outer core and are completely blocked, creating a secondary shadow zone.
What is one way that scientists know the outer core is liquid?
Scientists know the outer core is liquid because S waves, which cannot travel through liquid, are not detected beyond the core. Additionally, seismic waves from earthquakes have shown that P waves slow down significantly when passing through the outer core, indicating it is a liquid layer.
Do seismic waves speed up or slow down as they travel downward and reach the Moho?
Seismic waves generally speed up as they travel downward and reach the Moho, the boundary between the Earth's crust and mantle. This increase in speed is due to the change in density and composition of the Earth's layers, causing the waves to travel faster in the more rigid mantle layer compared to the crust.
Does primary waves slow down as they travel through solids?
no
