Ecology and biomes quiz online, 4th, 5th, 6th Grades. This is an interactive online biology test in which students will learn concepts related to biomes and ecosystems. They will learn the definition of a biome, some examples of biomes, animal species that live in specific biomes and more. They will also learn about the abiotic and biotic components of an ecosystem and how they interact with each other. This quiz has an answer key that will check responses as students take the test. There is no limit to the number of times you can take this test. Hence it will serve as a good preparation tool prior to a test which parents and teachers can recommend to their kids.