What letter is the inner core?

What letter is the inner core?

The Earth’s core is divided into two layers, a solid inner core, and a liquid outer core. The Inner Core (D) (1216 km) is solid nickle-iron alloy. The Outer Core (C) (2270 km), is a molten nickle-iron alloy. The Mantle (B) is approximately 2885 kilometers thick and is the middle layer of the Earth.

What stat is the inner core?

iron
Inner Core: Like the outer core, the inner core is composed primarily of iron and nickel and has a radius of ~1,220 km. Density in the core ranges between 12,600-13,000 kg/m3, which suggests that there must also be a great deal of heavy elements there as well – such as gold, platinum, palladium, silver and tungsten.

Which layers of Earth’s interior are represented by letters A and B?

A is the rigid mantle and B is the lithosphere.

What is the composition of the inner core?

Unlike the mineral-rich crust and mantle, the core is made almost entirely of metal—specifically, iron and nickel. The shorthand used for the core’s iron-nickel alloys is simply the elements’ chemical symbols—NiFe.

What is compositional layer?

Compositional Layers The outermost solid layer of a rocky planet or natural satellite. A layer of the Earth (or any planet large enough to support internal stratification) between the crust and the outer core. It is chemically distinct from the crust and the outer core. The mantle is not liquid.

How do scientist know about the inner core?

So scientists rely on seismic waves—shock waves generated by earthquakes and explosions that travel through Earth and across its surface—to reveal the structure of the interior of the planet. A few P-waves, which should have been deflected by the core, were in fact recorded at seismic stations.

What is the description of inner core?

The inner core is a hot, dense ball of (mostly) iron. It has a radius of about 1,220 kilometers (758 miles). Temperature in the inner core is about 5,200° Celsius (9,392° Fahrenheit). The inner core’s intense pressure—the entire rest of the planet and its atmosphere—prevents the iron from melting.

Which part of Earth’s inner interior is convection?

Which part of Earth’s interior is inferred to have convection currents that cause tectonic plates to move? Asthenosphere.

What metals is the inner core made of?

How can you differentiate compositional and mechanical properties?

Compositional Layers The Earth has different compositional and mechanical layers. Compositional layers are determined by their components, while mechanical layers are determined by their physical properties. The outermost solid layer of a rocky planet or natural satellite.

Which is hotter the inner core or the outer core?

Due to its immense heat energy, the inner core is more like the engine room of the Earth. The outer core of the Earth is similar to a very hot ball of metals, whose temperature is around 4000 oF to 90000F. It is so hot that the metals inside are all in the liquid state.

Why is the inner core of the earth solid?

The inner core is solid due to the pressure caused by the weight put on it by the Earth’s other three layers, the crust, the mantle, and the outer core. Quiz. Test yourself on the structure of the Earth.

What are the oscillations of the inner core?

These oscillations too depend strongly on the density, size, and shape of the inner layers. The velocity of the S waves in the core varies smoothly from about 3.7 km/s at the center to about 3.5 km/s at the surface.

What is the boundary between the inner and outer cores called?

The boundary between the inner and outer cores is sometimes called the “Lehmann discontinuity”, although the name usually refers to another discontinuity. The name “Bullen” or “Lehmann-Bullen discontinuity”, after K. Bullen has been proposed, but its use seems to be rare. The rigidity of the inner core was confirmed in 1971.