These quizzes include questions on biotic and abiotic factors, habitat and niche, food chains and food webs, the flow of energy through the ecosystem, the human impact on the environment, greenhouse effect, ozone depletion, levels of ecological organization, and more. See detailed list of topics below. Use this set of 2 printable or digital quizzes in your introductory ecology lessons to keep your students studying in the days leading up to the unit exam. Each quiz is 2 pages and includes a te