1  2  3  4 

1  _  _  _  _

2  _  _  _  _

3  _  _  _  _

4  _  _  _  _


ACROSS
1)  excavation in the earth from which ores and ____rals are extracted
2)  an elaborate song for solo voice
3)  a male human offspring
4)  hinge joint in the human leg connecting the tibia and fibula with the femur and protected in front by the patella


DOWN
1)  a covering to disguise or conceal the face
2)  a heavy ductile magnetic metallic element; is silver-white in pure form but readily rusts; used in construction and tools and armament; plays a role in the transport of oxygen by the blood
3)  the cardinal number that is the sum of eight and one
4)  freedom from difficulty or hardship or effort

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