[Free Registration/Login may be required to access all resource tools.] Energy is the ability to do work. In organisms, this can be physical work, like walking or jumping, or it can be the work used to carry out the chemical processes in...

[Free Registration/Login may be required to access all resource tools.] Describes the different roles in an ecosystem.

[Free Registration/Login may be required to access all resource tools.] Describes the different roles in an ecosystem.

[Free Registration/Login may be required to access all resource tools.] Describes various types of hazardous waste.

[Free Registration/Login may be required to access all resource tools.] Describes how energy is transferred from one organism to another.

This overview of feeding relationships illustrates to students the trophic levels of different organisms in an ecosystem. Hover the mouse over different terms to see their definitions.