Ohio 5th Grade Science OST Practice Test

The idea being tested is how to tell apart where an organism lives from the role it plays in its ecosystem. Habitat is the physical place and environment where an organism lives, including things like climate, water, plants, and the landscape. The niche is the organism’s job or role within that ecosystem—how it gets its food, how it interacts with other living things, when it’s active, and how it helps (or fits into) the community’s energy flow. So saying that habitat is the place where an organism lives and niche is the organism’s role and job in its ecosystem captures both ideas. For example, a frog’s habitat might be a pond or marsh, while its niche includes eating insects and being prey for other animals. The other options mix up these definitions or bring in unrelated ideas—weather isn’t habitat, and niche isn’t about color.