26. What mineral is used to make iron?
A) Quartz
B) Feldspar
C) Hematite
D) Olivine
Answer: C) Hematite
27. What mineral is used to make steel?
A) Quartz
B) Feldspar
C) Iron
D) Olivine
Answer: C) Iron
28. What mineral is used to make copper?
A) Quartz
B) Feldspar
C) Copper
D) Olivine
Answer: C) Copper
29. What mineral is used to make gold?
A) Quartz
B) Feldspar
C) Gold
D) Olivine
Answer: C) Gold
30. What mineral is used to make silver?
A) Quartz
B) Feldspar
C) Silver
D) Olivine
Answer: C) Silver
