There are 3 different puzzles using the same clues but in different arrangements. This allows the teacher to use them on different days, different classes on 1 day, all in each class to prevent cheating, or as make up work for absentees who missed the day the puzzle was used. There is an Identification Chart with the names and pictures of 40 rocks and minerals. The puzzle could only use 39 of the names.
There are many nature study and science games in my TPT store -- Word Search, Crosswords, Anagrams, Bingo, Rummy, Concentration, Sorting, Tic Tac Know, Dominoes and Board games.