Chapter 2: Problem 6
A geode is a rock that appears dull on the outside but is filled with crystals inside. Many scientists theorize that some round geodes are formed when lava bubbles as it cools after a volcanic eruption. Minerals and water seep into the bubbles, and after the water evaporates, the minerals form crystals. Which of the following best supports the theory discussed above? A. Round geodes generally contain fewer crystals than do geodes of other shapes. B. Some geodes have been discovered in areas where there are no volcanoes. C. The water and minerals that seep into geodes cool quickly after entering air bubbles inside the geodes. D. The minerals found in round geodes are also typically present in volcano lava.
Short Answer
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.