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Fossil Fuels and the Carbon Cycle

Author(s): Nancy Moreno, PhD, Barbara Tharp, MS, and Judith Dresden, MS.
Showing Results for: carbon dioxide Return to Presentation

Biogeochemical Cycles

Chemical elements essential to life are available in limited amounts and must be cycled between living organisms and the environment. Because these processes involve both chemical and biological processes, they are called biogeochemical cycles. Elements such as carbon (from carbon dioxide), hydrogen, and nitrogen move between the atmosphere and organisms, while elements such as phosphorus, calcium, potassium, magnesium, sodium, and iron enter into organisms from the soil. The four primary biogeochemical cycles are water, nitrogen, carbon, and phosphorus.


Funded by the following grant(s)

National Institute of Environmental Health Sciences, NIH

National Institute of Environmental Health Sciences, NIH

My Health My World: National Dissemination
Grant Number: 5R25ES009259
The Environment as a Context for Opportunities in Schools
Grant Number: 5R25ES010698, R25ES06932


Houston Endowment Inc.

Foundations for the Future: Capitalizing on Technology to Promote Equity, Access and Quality in Elementary Science Education