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

The resources above correspond to the standards listed below:

Pennsylvania Core and Academic Standards

PA.4. Environment and Ecology
4.1. Ecology
4.1.4.A. Explain how living things are dependent upon other living and nonliving things for survival.
4.1.4.A.1. Explain what happens to an organism when its food supply, access to water, shelter or space (niche /habitat) is changed.
4.1.4.E. Explain that ecosystems change over time due to natural and/or human influences.