Ecology Crossword featuring a word bank and 12 terms; answer key included. Crossword puzzles are awesome, ready-to-use, no-prep activities for any grade. I like to give these to my students after they finish a test as a way to support early finishers and provide an opportunity for students to earn bonus points. Use as a bell work activity, homework, worksheet, term review, ticket to leave and more. Terms in Puzzle: Biotic Factors, Limiting Factors, Abiotic Factors, Increase, Food Web, Predation,