GENERAL SCIENCE
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Science Bowl Question

📅 NSB Round Robin 2009🎓 HS🔄 Round 6#️⃣ Question 6❓ TOSS-UP📝 Multiple Choice

Case hardening is a process through which:

W) the surface of a metal is hardened
X) the metal is hardened completely through
Y) the hardness of a metal is determined
Z) metals are shaped or formed
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