There are 3 different puzzles with the same clues but arranged differently. This allows the teacher to use them on multiple days, different classes on 1 day, all in the same class to prevent cheating or as make up work for absentees on the day the puzzle was used in class. There is an Identification Chart with 72 examples of 9 energy forms. The puzzles use at least 60 of the examples.
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.