Physical Geography Flashcards
Earth’s radius
Approx 6371km
Three divisions of earth interior
Crust, Mantle and Core
Crust thickness
Till 34 km
Mantle depth
From 34 to 2900 km
Core depth
From 2900km to 6371 km or 6400 km
Composition of Crust
SIAL - silicon and Aluminium
Composition of Mantle
SIMA
Composition of core
NIFE
Which crust is more thick oceanic or continental
Continental
Oceanic crust is made up of ?
SIMA
What is the reason behind high temp inside earth as per Arthur Holmes
Radioactive Elements
For every ____ m 1° C temp increases inside the earth
32
After 100km Rock melts true or false
True
What consists of Lithosphere
Crust + upper part of upper mantle
Up till 100-200 km
Lithosphere consists of SIMA AND SIAL ? T OR F
True
Asthenosphere is in which state
Semi solid
Asthenosphere is the source of ?
Magma
Asthenosphere depth range
100km to 700 km
Asthenosphere is part of crust/mantle / core
Upper mantle
What is the state of lower Mantle
Solid State due to pressure
State of outer core
Liquid
State of inner core
Solid
Why outer core is liquid
Because iron has a low melting point as compared to silicates
Barysphere
Outer and inner core
Mesosphere
Lower Mantle
Discontinuity b/w Upper crust and Lower Crust
Conrad
Discontinuity between Crust and Mantle
Moho
Discontinuity between upper Mantle lower Mantle
Repetite
Discontinuity between Mantle and core
Guttenberg
Discontinuity between Outer and inner core
Lehman
