Obsidian is a type of volcanic glass that is formed when lava cools. Obsidian is a/an______.
Select one:
a. Igneous Rock
b. Metamorphic rock
c. All the choices
d. Sedimentary Rock
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Obsidian is a type of volcanic glass that is formed when lava cools. Obsidian is a/an______.
Select one:
a. Igneous Rock
b. Metamorphic rock
c. All the choices
d. Sedimentary Rock
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Answer:
A. Igneous Rock
Explanation:
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock.