Journey to the Center

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Questions and Answers

What are the three main rocky layers of the Earth?

Crust, mantle, and core

What is the composition of the mantle?

Iron, magnesium, and silicon

What are the two layers of the Earth's core?

Inner core and outer core

How many layers does the Earth's atmosphere have?

Five Signup and view all the answers

What is the outermost layer of the Earth called?

Crust Signup and view all the answers

What is the semi-solid layer between the crust and the core called?

Mantle Signup and view all the answers

What are the two main components of the Earth's core?

The two main components of the Earth's core are the solid metal inner core and the liquid metal outer core. Signup and view all the answers

What is the composition of the inner core?

The inner core is mostly made up of iron and nickel. Signup and view all the answers

Why is the inner core solid?

The inner core is solid due to the extreme pressure it experiences, which prevents the iron from melting despite its high temperature. Signup and view all the answers

What is the composition of the outer core?

The outer core is composed of iron and nickel. Signup and view all the answers

What causes the Earth's magnetism effect on the crust?

The movement within the liquid outer core creates the Earth's magnetism effect on the crust. Signup and view all the answers

What is the largest layer of the Earth?

The mantle is the largest layer of the Earth. Signup and view all the answers

What is the role of gravity in the formation of the different layers of the Earth?

Gravity pulls the densest materials down toward the center of the Earth, causing the progression from the outer layers to the central layers to show increasing density of material. Signup and view all the answers

What is the lithosphere?

The lithosphere is made from the lower portion of the crust and the uppermost part of the mantle. Signup and view all the answers

How are tectonic plates formed?

Tectonic plates are formed from thick pieces of the lithosphere that include both oceanic and continental crust. Signup and view all the answers

What causes the movement of tectonic plates?

The movement of tectonic plates is caused by the convection currents in the mantle. Signup and view all the answers

What geological activity occurs along fault lines?

Earthquakes are commonly found along tectonic plate fault lines. Signup and view all the answers

What is the thinnest layer of the Earth?

The crust is the thinnest layer of the Earth. Signup and view all the answers

What is the role of subduction in the entry of water into the mantle?

Subduction allows water to enter the mantle when slabs of tectonic plates are pushed into the asthenosphere and fall into the transition zone. Signup and view all the answers