Third graders will make small-scale environments and will describe interactions between living and nonliving things in their environments.

Get the dirt on ecology! Look at how different ecosystems interact with one another, what alters ecosystems, and the cycles they experience.

Discover how organisms interact in their environment.

This digital textbook covers core earth science concepts and includes interactive features, real-world examples, videos, and study guides.

[Free Registration/Login may be required to access all resource tools.] Predation is another mechanism in which species interact with each other. Predation is when a predator organism feeds on another living organism or organisms, known...