Science Flashcards
- The outer layer of the Earth.
The Crust
*It is a very thin layer of solid rock. It is the thinnest layerUpper of the Earth. Covers about 0.8% of Earth’s Volume
The Crust
TMade up of both continental and oceanic, The continental crust is 8-km thick beneath the land and 32km thick beneath the oceans.
The Crust
) is abundant in oceanic crust. (Its younger or newer) Mostly Basalt (Basaltic rock)
SiMa
Thicker and older than Oceanic crust, And ___ is abundant in continental crust. Mostly Granite (Granatic rock)
(SiAl)
The _____ is composed of the crust and the upper part of the mantle. The rock in this layer is stronger and more rigid.
Lithosphere
.
is divided into several segment called Tectonic plate.
Lithosphere
is the part of the mantle underneath the lithosphere.
asthenosphere
, from the Greek word asthenes meaning “weak”.
asthenosphere
It is made of molten rock and metal so that it “flows” like hot asphalt.
asthenosphere
Discovered by Andrija Mohorovicic, 1909
Mantle
is responsible for many geological activities
Mantle
is the largest layer of the Earth. It is 2900km thick
mantle
It is made of partially molten mixture/ minerals of silicate minerals and cover 84% of the Earths volume.
mantle
It includes the lithosphere and asthenosphere.
mantle
It is very hot 1600°F at the top and 4000°F towards the center of the Earth.
mantle
core of the Earth is like a ball of very hot metals. And it is responsible for the generation of
Earths magnetic field
The core is divided into 2 layers-
Outer and Inner.
is so hot and has so much pressure that if you were to go there-you would be squished into something even smaller than a marble.
core
- Discovered by Inge Lemann 1936.
The Inner Core
It is composed of iron and nickel. It is responsible for the magnetic field of the Earth generates.
The Inner Core
The temperature gradient in this layer is believed to be higher than sun’s surface
The Inner Core
is solid iron in a center of the Earth. And has a radius of about 1216 km.
The inner core
The rock in this layer are rigid but not brittle.
The inner core
is liquid metal consist of mainly iron and nickel with 10% uranium and oxygen.
The outer core
