Structure Of The Earth Stuff Flashcards
Structure of the earth
Dndnd
How is the earth spherical
The earth rotates on its orbit
Aerial photographs
Other solar planets are round
Solar eclipse are also evidence that the earth is spherical
What are the sources of information about the earths interior
Mining , volcanic eruptions , hot springs , earth quakes , deep sea drilling
What is the outermost layer of the earth
Crust
What are the two types of crusts
Oceanic and continental
Describe oceanic crust
It is mainly composed of basaltic igneous rocks , mainly Silca and magnesium and their also called SIMA crust
Describe continental crust
It is composted of crystalline and granite rocks - aluminum and silica therefor are also called
SIAL layer
Which crust Is denser
Oceanic crust is dense than continental crust
What comes after the crust. , and describe it
The mantle. It is composed mainly of iron and silicates it has been referred as FEMA later
It is also where the most internal heat of the earth is located
Make subdivisions of the mantle
Lithosphere
Asthenosphere
Upper mantle
Lower mantle and
Describe lithosphere
Outermost part of mantle
Below the mohorovic discontinuity
It has part of the tectonic played that cover surface of earth
Describe asthenosphere
Lowe seismic velocity zone where rocks are at or near melting point
It has part of the tectonic plates
Describe lower mantle
Consists of silicon magnesium and oxygen
Describe upper mantle
Fill in
What is the third layer and describe it
It is the outer core.
It is hot and has liquid air compromising of nickel and liquid iron
Referred to as NiFe layer
