This is a tic tac toe game with a difference -- the players must correctly name a compound in order to place a marker on the playing area.There are 40 compounds to name and many resources to help learn them. There is a file named Rules for Naming Chemical Compounds, and another for practice naming them.
There are many nature study or science games in my TPT store --
Crossword, Word Search, Bingo, Rummy, Concentration, Sorting,
Tic Tac Know, Dominoes and Board games.