5 activities (Cryptogram, Crossword, Word Find, Double Puzzle & Bingo) to help students practice vocabulary words related to the relationships among organisms. Key Vocabulary termscommensalism, competition, consumer, ecosystem, food chain, food web, mutualism, parasitism, predator, prey, producer, symbiosis Download includes:Cryptogram - match symbols to letters and use hints (definitions) to decode 12 key vocabulary words Crossword - fill-in terms then use the letters from the completed puzzle