What is meant by Mohra week discontinuity?

Moho discontinuity is defined as the boundary between Earth’s crust and the mantle, observed by a sharp increase in the velocity of the seismic waves passing through the Earth. The name Mohorovicic discontinuity was received from Croatian geophysicist Andrija Mohorovičič, in 1909.

What is Mohra week discontinuity?

The Mohorovicic Discontinuity marks the lower limit of Earth’s crust. As stated above, it occurs at an average depth of about 8 kilometers beneath the ocean basins and 32 kilometers beneath continental surfaces. Mohorovicic was able to use his discovery to study thickness variations of the crust.

What is Mohra basic discontinuity?

The Mohorovičić discontinuity (/moʊhəˈroʊvɪtʃɪtʃ/ MOH-hə-ROH-vitch-itch, Croatian: [moxorôʋiːtʃitɕ]), usually referred to as the Moho discontinuity or the Moho, is the boundary between the Earth’s crust and the mantle.

What is meant by Mohorovicic Discontinuity Class 9?

The Mohorovicic Discontinuity, or Moho is the boundary between the crust and the mantle. This boundary is located at approximately 2891 km depth beneath the Earth’s surface.

What is mean by Moreover discontinuity?

British Dictionary definitions for Mohorovičić discontinuity

Mohorovičić discontinuity. / (ˌməʊhəˈrəʊvɪtʃɪtʃ) / noun. the boundary between the earth’s crust and mantle, across which there is a sudden change in the velocity of seismic wavesOften shortened to: Moho.

What is the Mohorovicic Discontinuity 1 point?

1 Answer. The Mohorovicic Discontinuity is the boundary between the earth’s crust and mantle. It was discovered by the refraction of seismic waves passing from one layer to the other.

What is true about the asthenosphere?

The asthenosphere is composed of solid rocks associated with the rigid mantle. The asthenosphere is a highly viscous layer located beneath the lithosphere. The asthenosphere is composed of liquid molten rock. The asthenosphere will fracture under extreme pressure.

Why is the asthenosphere important?

The asthenosphere is important because it is the force behind the plate tectonic motion and continental drift. It lubricates the plate tectonics. The asthenosphere has a fluid-like properties with high viscosity that the crust rides on.

What is the scientific definition of asthenosphere?

asthenosphere, zone of Earth’s mantle lying beneath the lithosphere and believed to be much hotter and more fluid than the lithosphere. The asthenosphere extends from about 100 km (60 miles) to about 700 km (450 miles) below Earth’s surface.

What is the role of the asthenosphere in the plate tectonics theory?

The asthenosphere acts as the lubricating layer below the lithosphere that allows the lithosphere to move over the Earth’s surface.

What is an example of asthenosphere?

Asthenosphere definition

A zone in the upper mantle of the earth, consisting of hot, plastic rock, that underlies the solid lithosphere. (geology) The zone of the Earth’s upper mantle, below the lithosphere. The upper part of the Earth’s mantle, extending from a depth of about 75 km (46.5 mi) to about 200 km (124 mi).

What is the composition of asthenosphere?

The Asthenosphere is made up of semi-plastic rock. Since the Lithosphere has a lower density, it floats on top of the Asthenosphere similar to the way in which an iceberg or a block of wood floats on water. The lower mantle below the Asthenosphere is more rigid and less plastic.

What is another name for the asthenosphere?

The terms mantle and asthenosphere are synonymous.

Why is convection in the asthenosphere important?

Heat from deep within Earth is thought to keep the asthenosphere malleable, lubricating the undersides of Earth’s tectonic plates and allowing them to move. Convection currents generated within the asthenosphere push magma upward through volcanic vents and spreading centres to create new crust.

What is the sentence of asthenosphere?

It was found that the asthenosphere had invaded the overlying lithosphere. This example is from Wikipedia and may be reused under a CC BY-SA license. Beneath the lithosphere is the asthenosphere, a relatively low-viscosity layer on which the lithosphere rides.

Which is the hottest layer?

The inner core

The inner core is the hottest layer, above 9000 Fahrenheit and it is 1250 km thick!

What is the coldest layer?

The mesosphere

The mesosphere is the middle layer of the atmosphere that has the coldest layer. … The layer contains most of the mass of the atmosphere. The mesosphere is the coldest atmospheric layer surrounding the earth.

What layer are satellites?

Most satellites occupy regions of the atmosphere known as the thermosphere and exosphere. The outer space refers to the expanse found beyond the Earth’s atmosphere between celestial bodies.

Which is the thinnest layer of the Earth?

the crust

Discuss with the whole class what the relative thicknesses of the layers are — that the inner core and outer core together form the thickest layer of the Earth and that the crust is by far the thinnest layer.

Which layer of Earth is liquid?

The outer core

The outer core is the liquid largely iron layer of the earth that lies below the mantle. Geologists have confirmed that the outer core is liquid due to seismic surveys of Earth’s interior. The outer core is 2,300 km thick and goes down to approximately 3,400 km into the earth.

What layer is solid iron and nickel?

core

5 In the center of Earth is the core, consisting of two layers: the inner and outer core. The entire iron and nickel core is extremely hot, so it is not surprising to learn that the outer core is in a molten state. However, the inner core’s iron and nickel are solid.

Why is the outermost layer Brown?

Melanocytes produce the skin coloring or pigment known as melanin, which gives skin its tan or brown color and helps protect the deeper layers of the skin from the harmful effects of the sun.

Where is bread a staple food?

Bread is the staple food of the Middle East, Central Asia, North Africa, Europe, and in European-derived cultures such as those in the Americas, Australia, and Southern Africa. This is in contrast to parts of South and East Asia, where rice or noodles are the staple.

Is the thinnest and outermost layer of the Earth?

The Earth can be divided into four main layers: the solid crust on the outside, the mantle, the outer core and the inner core. Out of them, the crust is the thinnest layer of the Earth, amounting for less than 1% of our planet’s volume.

How thick is the outer core?

2,200 km-thick

Unlike the yolk of an egg, however, the Earth’s core is actually made up of two distinct parts: a 2,200 km-thick liquid outer core and a 1,250 km-thick solid inner core.

What are 5 facts about the outer core?

The outer core is the third layer of the Earth. It is the only liquid layer, and is mainly made up of the metals iron and nickel, as well as small amounts of other substances. The outer core is responsible for Earth’s magnetic field. As Earth spins on its axis, the iron inside the liquid outer core moves around.

Which country is the center of the Earth?

2003 calculation of the geographical center of all land surfaces on Earth: İskilip, Turkey. The geographical center of Earth is the geometric center of all land surfaces on Earth.