In 3–5 sentences, explain obsidian

  1. Obsidian is a glassy black igneous rock. A sample of obsidian is shown. Which type of rock forms in a similar manner as obsidian
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  2. Obsidian is a glassy black igneous rock. A sample of obsidian is shown.Which type of rock forms in a similar manner as obsidian
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  3. Obsidian is a glassy black igneous rock. A sample of obsidian is shown. Which type of rock forms in a similar manner as obsidian
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  4. Obsidian is a glassy black igneous rock. A sample of obsidian is shown. Which type of rock forms in a similar manner as obsidian
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  5. Obsidian is a glassy black igneous rock. A sample of obsidian is shown. Which type of rock forms in a similar manner as obsidian
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  6. In 3–5 sentences, explain obsidian to someone who is unfamiliar with the object using an analogy that clarifies the object’s
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  7. An unknown mineral specimen is not scratched by a penny and does not exhibit cleavage. The mineral is most likely to be:obsidian
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  8. Imagine an archeologist said they found an “osseous knife” used by ancient humans. What would you expect the knife to be
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  9. Obsidian volcanic lava cools quickly .Granite magma cool slowly underground . Quartzite quartz sand put under intense heat and
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  10. (a) In 1–2 sentences, explain how this excerpt reflects domestic challenges faced by the U.S. government in the 1920s.(b) In
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