Multiple Choice
A volcanologist extracts a piece of rock near a volcano site and observes no visible crystals. After studying the rock for a while, he assumes it is obsidian. Why does he do so?
A) Obsidian is always hot.
B) Obsidian forms underground.
C) Obsidian is green.
D) Obsidian forms in lava flows.
Correct Answer:
Verified
Correct Answer:
Verified
Q1: Most volcanoes are found at or near
Q2: The texture of an igneous rock consisting
Q3: Which of the following is a difference
Q4: A scientist identifies a rock sample as
Q6: The lava at Kilauea volcano in Hawaii
Q7: Why is plutonic a synonym of intrusive?<br>A)
Q8: Highly vesicular, intermediate-sized pyroclastic fragments of basalt
Q9: Why do felsic rocks typically have the
Q10: Volcanic is a product of combustion.
Q11: Which process forms pahoehoe lava formations?<br>A) Very