Khan Academy
Khan Academy: Biogeochemical Cycles Review
Review information on the cycling of matter throughout the spheres of Earth.
Khan Academy
Khan Academy: Biogeochemical Cycles
Test your knowledge of the water cycle, carbon cycle, and nitrogen cycle.
Utah Education Network
Uen: Themepark: Cycles
This is a large collection of resources on cycles of nature and the Earth. There is a constant exchange of the elements between air, earth, water, plants, and animals. Most biological processes wind up back where they started. These...
University Corporation for Atmospheric Research
Ucar: The Carbon Cycle
A comprehensive introduction to the carbon cycle. The cycle of atoms between living and non-living things is known as a biogeochemical cycle. The most common of these are the carbon and nitrogen cycles.
CK-12 Foundation
Ck 12: Life Science: Water 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...
Vision Learning
Visionlearning: Earth Science: The Nitrogen Cycle: Of Microbes and Men
Instructional module focusing on the nitrogen cycle. Discussion includes the requirement of nitrogen by all organisms, the five processes in the nitrogen cycle, and how humans impact this cycle. The site also includes an interactive...
Vision Learning
Visionlearning: Earth Science: The Carbon Cycle: What Goes Around Comes Around
Instructional module focusing on the carbon cycle. Discussion includes the biological and geological components of how carbon moves through the atmosphere, lithosphere, and hydrosphere. Site also includes an interactive practice quiz and...
PBS
Pbs Learning Media: The Nitrogen Cycle
Nitrogen, one of the most abundant elements in the universe, is essential to life. This interactive activity adapted from the University of Alberta provides an overview of the nitrogen cycle. Includes background reading handout and...
PBS
Pbs Learning Media: Cave Formation: Biogeochemical Cycles
This video segment adapted from NOVA chronicles the discoveries that led to a radical new theory in which living organisms, not just geological processes, play an active role in cave formation. [5:42]
CK-12 Foundation
Ck 12: Earth Science: Carbon Cycle and Climate
[Free Registration/Login may be required to access all resource tools.] Explains the cycle of carbon through the atmosphere, geosphere, and biosphere.
CK-12 Foundation
Ck 12: Biology: Water Cycle
[Free Registration/Login may be required to access all resource tools.] Covers the water cycle.
Woods Hole Oceanographic Institution
Woods Hole Oceanographic Institution: Following the Carbon Cycle
Illustrated interactive explores the 12 steps of the carbon cycle that show how carbon moves through the environment.
Biology Pages
Kimball's Biology Pages: The Nitrogen Cycle
An overview of the nitrogen cycle, covering nitrogen fixation, decay, nitrification, denitrification, and more.
University of Illinois
University of Illinois: Illinois State Water Survey: Simplified Nitrogen Cycle
A semi-technical description of the nitrogen cycle. Contains a link to an abridged version of the page along with a list of further resources on the topic.
University of Missouri
Nitrogen in the Environment: The Nitrogen Cycle
A description of the key concepts and steps within the nitrogen cycle, along with a large chart illustrating the cycle in pictorial form.
Mocomi & Anibrain Digital Technologies
Mocomi: Carbon Cycle
The carbon cycle is one of the most important cycles. It is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth. This cycle is important because it...
Science Buddies
Science Buddies: Growing a Soil Menagerie
Everything on our planet is linked by a giant recycling system called the biogeochemical cycle. How our planet recycles and reuses everything we need to support life is explained by making a miniature biosphere in this lab. You will also...
BiologyWise
Biology Wise: Understanding Nitrogen Cycle With a Diagram
Describes the steps involved in the nitrogen cycle, a critical biogeochemical cycle.
Vision Learning
Visionlearning: Earth Cycles: The Phosphorus Cycle
An introduction to the significance of phosphorus in regards to living organisms. An explanation of the phosphorus cycle is discussed in different scenarios.
Open Curriculum
Open Curriculum: Recycling Matter in Ecosystems
Students learn about biogeochemical cycles that recycle matter on Earth.
Other
Elmhurst College: Virtual Chembook: Carbon 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.
Other
Physical Geography: Nitrogen Cycle
Learn that the nitrogen cycle illustrates how nutrients cycle through a terrestrial ecosystem with the chapter in this free textbook. Explains how nitrogen plays an important role for life. See a diagram of the nitrogen cycle that shows...
University of Illinois
University of Illinois: Illinois State Water Survey: Nitrogen Cycle: Human Impact on the Nitrogen Cycle
An overview of the impact of human activities on the environment and how those actions effect the nitrogen cycle.
University Corporation for Atmospheric Research
Ucar: Cycles of the Earth System: Traveling Nitrogen
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.