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Science Bowl Question

📅 NSB MS 2016🎓 MS🔄 Round 7#️⃣ Question 22❓ TOSS-UP📝 Multiple Choice

Which of the following best describes why Earth has a magnetic field?

W) The inner core contains solid iron
X) The outer core contains liquid iron
Y) The Moon exerts a gravitational pull
Z) The Sun exerts a gravitational pull
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