Upon completion of this lesson, students should be able to:

  • Explain and identify food chain.
  • Describe ecological pyramids.
  • Explain biogeochemical cycles such as water cycle, oxygen cycle, nitrogen cycle, carbon cycle.
  • Describe different components of ecosystem.


Biogeochemical Cycles

This note explains about biogeochemicals and lists different biogeochemical cycles with their explanation.

Introduction to Ecosystem

This note explains what is ecosystem and talks about different components of ecosystem.

Food Web and Ecological Pyramids

This note talks about food chain and web along with types of ecological pyramid.