Smarty Pants Quiz
09
00
00
The most common rock on Earth's service is called?
Quartz
Basalt
Slate
Unakite
Any better ideas? Try again!
Bubbles of gas trapped in cooling lava create holes in the rock.
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09
00
00
The most common rock on Earth's service is called?
4 of 6 people (66.67%) answered this question correctly.
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