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Gucchi:
Which statement best explains why obsidian has a smooth glassy surface but basalt has a rough surface? Obsidian is formed due to compaction and basalt is formed due to weathering. Obsidian allows less crystal growth than basalt because it cools more rapidly than basalt. Basalt is more easily eroded than obsidian because it is formed at a lower temperature than obsidian. Basalt is formed from the erosion of sediments and obsidian is formed due to the metamorphosis of rocks.
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Gucchi:
Am I right with B?
Gucchi:
@axie
Gucchi:
@florisalreadytaken
axie:
obsidian is formed when lava flows into a river, cooling quickly and making glossy surfaces, basalt forms when the gas bubbles get formed into the rock
axie:
so yes B would be the answer
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Gucchi:
thank you
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