Quick Answer: What Is The Principle Cause Of Convection In Earth’S Mantle?

What is the principal cause of convection in Earth’s mantle?

Convection Currents in the Mantle Heat in the mantle comes from the Earth’s molten outer core, decay of radioactive elements and, in the upper mantle, friction from descending tectonic plates..

What is a destructive force caused by the convection in the mantle?

Answer: convergent margins. Explanation: Mantle convection causes the phenomenon of plate tectonics on the earth surface. From plate tectonics, we understand that the earth surface is broken into several giant slabs made up of the crust and upper part of the mantle.

What is a destructive force?

• A destructive force is a process that breaks down the surface features of the Earth. – Examples are: • Erosion (water-river and oceans and wind) • Weathering • Earthquakes • Volcanoes • Impact of organisms. 4. Erosion • Erosion is the movement of sediments and soil by wind, water, ice and gravity.

What are the three parts of the mantle?

The mantle is divided into several layers: the upper mantle, the transition zone, the lower mantle, and D” (D double-prime), the strange region where the mantle meets the outer core. The upper mantle extends from the crust to a depth of about 410 kilometers (255 miles).

Why is the mantle important?

The Earth’s mantle plays an important role in the evolution of the crust and provides the thermal and mechanical driving forces for plate tectonics. … Because subducted plates are relatively cool, they decrease the temperature of nearby mantle, leaving relatively warm mantle in the regions between two subduction zones.

How does convection in the mantle cause earthquakes?

Earthquakes at plate boundaries occur when plates move horizontally, crashing into each other, moving away from each other or sliding past each other. … Changes in the Earth’s surface generated by mantle convection — specifically, mantle upwelling — contributed to intraplate earthquakes, according to the study.

What is the special feature of the mantle?

According to Wikipedia, one of the unique traits of the upper mantle is its movement. Due to the temperature differences between the surface of the Earth and outer core the upper mantle has the ability to flow like a fluid. It has a soft and weak layer called the asthenosphere which is capable of flowing.

What is convection current in the mantle?

Mantle convection is the very slow creeping motion of Earth’s solid silicate mantle caused by convection currents carrying heat from the interior to the planet’s surface. … This subducted material sinks through the Earth’s interior.

In which layer does mantle convection occur?

AsthenosphereMantle convection occurs in the: Asthenosphere.

What would happen if there was no mantle?

The entire solid crust would likely be melted into the core, and the geologic processes of early Earth would start all over again; only this time, the planet would be significantly smaller. … Also, due to the loss of a convective mantle, Earth’s magnetic field would likely be completely dissipated.

What would happen if mantle convection stopped?

Convection currents within the Earth’s mantle are caused by hot material rising upwards, cooling, then dropping back toward the core. … If the interior of the Earth were to cool enough for convection currents to stop, then the motion of the plates would cease, and the Earth would become geologically dead.

What is a destructive force in the mantle?

constructive forces. forces that construct, or build up, mountains. destructive forces. because forces such as ice, rain, wind, and changing temperatures wear down, or destroy, landmasses. how do geologists learn about earth’s interior?

What happens when an oceanic plate digs into Earth’s hot interior?

As the edge of the oceanic plate digs into Earth’s hot interior, some of the rock in it melts. The melted rock rises up through the continental plate, causing more earthquakes on its way up, and forming volcanic eruptions where it finally reaches the surface.

Why is mantle convection important?

This flow, called mantle convection, is an important method of heat transport within the Earth. Mantle convection is the driving mechanism for plate tectonics, which is the process ultimately responsible for producing earthquakes, mountain ranges, and volcanos on Earth.

How do convection currents work in the mantle?

In Earth’s mantle, large amounts of heat are transferred by convection currents, as shown in Figure 10. Heat from the core and the mantle itself causes convection currents in the mantle. … The hot rock eventually cools and sinks back through the mantle. Over and over, the cycle of rising and sinking takes place.

What would happen if the Earth’s mantle temperature were to decrease?

When the Earth has cooled completely, the movement in the mantle will also stop eventually. Then, the plates on the surface will no longer move and there will be fewer earthquakes and volcanic eruptions.

What are 5 facts about the mantle?

Planet EarthThe Mantle is the second layer of the Earth. … The mantle is divided into two sections. … The average temperature of the mantle is 3000° Celsius. … The mantle is composed of silicates of iron and magnesium, sulphides and oxides of silicon and magnesium.The mantle is about 2900 km thick.More items…