Science Worksheets and Study Guides Fourth Grade. Ecosystems and changes in ecosystems

The resources above correspond to the standards listed below:

Ohio Learning Standards

Topic: Earth’s Living History - This topic focuses on using fossil evidence and living organisms to observe that suitable habitats depend upon a combination of biotic and abiotic factors.
4.LS.1: Changes in an organism’s environment are sometimes beneficial to its survival and sometimes harmful.
Ecosystems can change gradually or dramatically. When the environment changes, some plants and animals survive and reproduce and others die or move to new locations.
Ecosystems are based on interrelationships among and between biotic and abiotic factors. These include the diversity of other organisms present, the availability of food and other resources, and the physical attributes of the environment.