The most common rock on Earth's service is called?

Bubbles of gas trapped in cooling lava create holes in the rock.

4 of 6 people (66.67%) answered this question correctly.

0 of 21 questions completed

Dashboard

Your Coins: 0

World Coin Count: 7260

Product	Value	Cost
Life	Buy lives to help pass the quiz.	1 x 50 Coins