2007-04-26 09:27:37 · 4 answers · asked by Matthew H 1 in Science & Mathematics ➔ Earth Sciences & Geology
The Four Layers
The Earth is composed of four different layers. Many geologists believe that as the Earth cooled the heavier, denser materials sank to the center and the lighter materials rose to the top. Because of this, the crust is made of the lightest materials (rock- basalts and granites) and the core consists of heavy metals (nickel and iron).
The crust is the layer that you live on, and it is the most widely studied and understood. The mantle is much hotter and has the ability to flow. The Outer and Inner Cores are hotter still with pressures so great that you would be squeezed into a ball smaller than a marble if you were able to go to the center of the Earth!!!!!!
2007-04-26 09:32:41 · answer #1 · answered by jenaalyse 2 · 0⤊ 0⤋
I wonder if the other people read the question? It did not say "...the four layers of the Earth", it said "...the four layers of the crust". In Oceanic Crust there are (from bottom to top) massive gabbros, sheeted dikes, pillow basalts and pelagic sediments. Continental Crust is too variable and complex to give a simple answer, but a typical sequence might be granulites, crystalline basement (metamorphic and igneous) rocks, marine and terrestrial sedimentary rocks, and loose and unconsolidated sediments.
2007-04-26 18:45:59 · answer #2 · answered by Amphibolite 7 · 0⤊ 0⤋
Moho layer, magma layer, plate layer, mantle.
2007-04-26 17:21:07 · answer #3 · answered by ? 4 · 0⤊ 0⤋
- crust
- mantle
- outter core
- inner core
2007-04-26 17:06:45 · answer #4 · answered by Hzl 4 · 0⤊ 0⤋