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Which of these rocks forms from lava that cools very quickly?

A) schist
B) gneiss
C) granite
D) obsidian

Respuesta :

ILovsciencegirl20
I am thinking the rock that forms from lava that cools quickly is D) Obsidian.
gabriellec4114
D: Obsidian. 

It is a type of glass that is made from lava cooling very quickly. unlike the obsidian granite cools slowly to form a light-coloured rock while the obsidian formes a black coloured glass type rock.

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