Earth's Internal Layers-composistions, Thickness, How They Are Defined

Question 1

Continental crust crust:

Answer 1

Continental crust is they layer of igneous, sedimentary, and metamorphic rocks that forms the continents and the areas of shallow seabed close to their shores, known as continental shelves

Question 2

Ocean crust

Answer 2

Oceanic crust is the uppermost layer of the oceanic portion of a tectonic plate. It is composed of the upper oceanic crust, with pillow lavas and a dyke complex, and the lower oceanic crust composed of troctolite, gabbro and ultra magic cumulates. The credit overlies the solidified and uppermost layer of the mantle

Question 3

Core

Answer 3

The earths core is part of the earth in the middle of our planet. It has a solid inner core and a liquid outer core

Question 4

Mantle

Answer 4

The mantle is the mostly solid bulk of the earth’s Interior. The mantle lies between earths dense, super heated core and it’s thin outer layer, the crust.
The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of the earths total volume

Question 5

Crust

Answer 5

In geology the crust is the outermost solid shell of a rocky planet. It is distinguished from the underlying mantle by its chemical makeup.

Question 6

The asthenosphere

Answer 6

Highly viscous, mechanically weak, and ductile deforming region of the upper mantle of the earth.

Question 7

lithosphere

Answer 7

A lithosphere is the rigid, outermost shell of a terrestrial planet, that is defined by it’s rigid mechanical properties. On earth it is composed of the crust and a portion of the upper mantle that behaves elastic ally on time scales of one thousand years or greater

Question 8

Lower mantle

Answer 8

Lower mantle is the lower liquid portion of the mantle ranging from 400 miles below the surface to 1800 miles below the surface.
Being so deep inside the earth, the temperature and pressure of the lower mantle are extremely high.

Minerals form here

Question 9

Outer core

Answer 9

The outer core of the earth is a fluid layer about 1,500 miles thick and composed of mostly iron and nickel that lies above the earths solid inner core and below its mantle

Question 10

Inner core

Answer 10

The earth was discovered to have a solid inner core distinct from its molten outer core in 1936

Question 11

Moho: Mohorovicic discontinuity

Answer 11

Marks the boundary between the upper mantle and the crust

Question 12

Gutenberg discontinuities:

Answer 12

Marks the boundary between the lower mantle and the outer core

Question 13

Isostasy

Answer 13

The equilibrium that exists between parts of the earth’s crust, which behave’s as if it consists of blocks floating on the underlying mantle, rising if material (such as an ice cap) is removed and sinking if material is deposited.