11. Which metal is used to make airplane parts?
a) Aluminum
b) Iron
c) Copper
d) Silver
Answer: a) Aluminum
12. Which metal is used to make nuclear reactors?
a) Copper
b) Iron
c) Uranium
d) Silver
Answer: c) Uranium
13. Which metal is used to make lead-acid batteries?
a) Zinc
b) Iron
c) Copper
d) Lead
Answer: d) Lead
14. Which metal is used to make coins in the United States?
a) Gold
b) Silver
c) Copper
d) Nickel
Answer: d) Nickel
15. Which metal is used to make jewelry?
a) Gold
b) Aluminum
c) Copper
d) Iron
Answer: a) Gold