EARTH SCIENCE
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Science Bowl Question

📅 NSB Round Robin 2008🎓 MS🔄 Round 1#️⃣ Question 18❓ TOSS-UP📝 Multiple Choice

By our current estimations, the Earth is approximately how many billions of years old:

W) 8.4
X) 6.2
Y) 4.6
Z) 2.4
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