Test your knowledge of biogeochemical cycles.

Biogeochemical cycles happen when individual elements are recycled over and over in different parts of the Earth. Two examples are the Nitrogen Cycle and Carbon Cycle. Read an explanation of biogeochemical cycles and view a diagram of...

Brief informational site provides the definition as well as explanation as to what Biogeochemical Cycles and what they do.

[Free Registration/Login may be required to access all resource tools.] An introduction to the biogeochemical cycle, the water cycle. Recognize evaporation, sublimation, and condensation. Identify groundwater and runoff water supplies.

Review information on the cycling of matter throughout the spheres of Earth.

Test your knowledge of the water cycle, carbon cycle, and nitrogen cycle.

[Free Registration/Login may be required to access all resource tools.] Water and elements like carbon and nitrogen are constantly being recycled through the environment. This process is called a biogeochemical cycle because it involves...

[Free Registration/Login may be required to access all resource tools.] Covers the water cycle.

A step-by-step discussion of the stages in the carbon cycle. Each step includes a diagram further explaining the processes involved, as well as pictures depicting combustion, respiration, photosynthesis, and decomposition.

Through hands-on activities, students play the role of nitrogen atoms traveling through the nitrogen cycle to gain understanding of the varied pathways through the cycle and the relevance of nitrogen to living things.

Try these five multiple-choice questions about the cycling of matter. Each question has a clickable hint prompt as well as a self-checking feature.

A diagram which clearly illustrates the phosphorous cycle in a somewhat technical manner.

Interesting information on the Nitrogen Cycle as it relates to the Earth system.

College-level online course highlighting the fundamentals of ecology. Course topics include coevolution of the biosphere, geosphere, atmosphere, and hydrosphere; photosynthesis and respiration; and the carbon, nitrogen, and water cycles....

Students study the chemical characteristics of the World Ocean, water chemistry, element cycles, and chemical resources in this multi-media learning module.

This lab uses a robust model of the carbon cycle to give an intuitive sense for how carbon circulates through the atmosphere, biosphere, oceans, and crust.

Learn about the considerable variety of materials on Earth, and the basic properties which set them apart. Read how all matter on Earth comes into play when it comes to environmental issues.

Through interactive activities, reading exercises, and lab activities, students study how science, matter, energy, and systems are interrelated.

In this experiment, students investigate the importance of carbon dioxide to the reproductive growth of a marine microalga, Dunalliela sp.