Answer:
The magma that melts in the upper mantle and erupts at the mid-ocean ridge has a different composition (higher in Ca, Mg, Fe and relatively lower in Si and Al) than the composition of the magma (more Si, Al, Na, K rich in relative terms) that built the continents. Melting different degrees (2%, 5%, 30%) of a rock with a mantle-like composition generates magma of different Al, Si contents. Continents grow at their edges by partial melting of oceanic crust that is being subducted, generating magmas of a somewhat more Si, Al-rich composition than the subducting slab itself. The chemistry and physics of melting a mixture of minerals rather than one homogeneous substance has the wonderful outcome of creating two distinct types of crust:
I'm am unsure what context the answer needs to be in or how specific they need to be. Minerals are used in most building supplies, fertilizers, cooking ingredients, and machinery.
Answer:
The First Consequence of Greed is dissatisfaction and as for dissatisfaction, it destroys endeavor and enthusiasm for work, and causes the dissatisfied person to complain instead of giving thanks, and makes him lazy. Such a person abandons possessions which though few in number are licit and seeks possessions that are illicit and trouble-free.
Explanation:
Hope this helps :)
pls make brainliest :p
It is a productive farming area
Answer:
two tectonic plates are diverging away from each other, which causes new crust to be created at the boundary between these two plates.
Explanation: