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Science Bowl Question

📅 NSB Round Robin 2020🎓 HS🔄 Round 2#️⃣ Question 21🌟 BONUS📝 Multiple Choice

Which of the following statements about comets is true?

W) Most comets have been in their current orbits since the early solar system
X) All comets are thought to originate from the Oort cloud
Y) Comets are thought to be regularly supplied from the outer solar system
Z) Comets have density about that of water
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