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Science Bowl Question

📅 NSB MS 2017🎓 MS🔄 Round 11#️⃣ Question 4❓ Toss-up📝 Multiple Choice

Which of the following are the two parts of sunspots?

W) Aphelion and Parahelion
X) Central Umbra and Penumbra
Y) Crest and Trough
Z) Static and Dynamic
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