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Science Bowl Question

📅 NSB Round Robin 2013🎓 MS🔄 Round 13#️⃣ Question 9🌟 BONUS📝 Multiple Choice

What is the name for rock formed from hot volcanic ash welding together?

W) Pumice
X) Rhyolite [RY-uh-lyt]
Y) Obsidian
Z) Tuff
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