Answers revealed in the comments.
GAME 1
The Earth’s solid inner core and its liquid outer core are both primarily made up of two elements. Name those two elements, both of which are metals with atomic numbers lower than 30.
GAME 2
As of the 1900 census, New York, Chicago, and Philadelphia were the three most-populous cities in the U.S.
Name two of the other seven cities that were in the top ten, none of which are still in the top ten today.
Name two of the other seven cities that were in the top ten, none of which are still in the top ten today.
hebspeaks 
Game one answers:
Iron
Nickel
GAME 2 answers:
St. Louis (MO)
Boston (MA)
Baltimore (MD)
Cleveland (OH)
Buffalo (NY)
San Francisco (CA)
Cincinnati (OH)