Encyclopedia of Earth
Encyclopedia of Earth: Biochemistry: Nitrogen Cycle
Article explaining what the nitrogen cycle is, and its role in an ecosystem. (Published: June 28, 2010)
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...
University Corporation for Atmospheric Research
Ucar: The Nitrogen Cycle Game
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.
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.
BiologyWise
Biology Wise: Nitrogen Cycle Steps
Nitrogen is essential to all living things. This article explains what the nitrogen cycle is and the five steps involved in it.
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.
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 Missouri
Microbes in Action: "There's Something Fishy": The Nitrogen Cycle
An opportunity for students to experience the nitrogen cycle through observing daily changes in an aquarium. Students test the level of three nitrogen compounds to understand the process of nitrification. Lesson plan gives a lab...
Utah Education Network
Uen: Nitrogen Cycle Stream Side Science
Students will learn about the nitrogen cycle through discussion and the construction of a diagram.
Encyclopedia of Earth
Encyclopedia of Earth: Nitrogen
Information about the element, Nitrogen, atomic number 14. Covers common chemical transformations, its physical properties, atomic properties, how abundant it is on the Earth, and details about health-related regulations. Also discusses...
BiologyWise
Biology Wise: Understanding Nitrogen Cycle With a Diagram
Describes the steps involved in the nitrogen cycle, a critical biogeochemical cycle.
University Corporation for Atmospheric Research
Ucar: Biogeochemical Cycles
The ways in which an element or compound such as water moves between its various living and nonliving forms and locations in the biosphere is called a biogeochemical cycle. All of the atoms that are building blocks of living things are a...
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.
University Corporation for Atmospheric Research
Ucar: Nitrogen
Facts about the chemical element, nitrogen found in the Earth's atmosphere.
Science Struck
Science Struck: Nitrogen in the Atmosphere
Learn about the properties of nitrogen, how it was first formed, where it is found, and the importance of the nitrogen cycle.
TeachEngineering
Teach Engineering: Go With the Energy Flow
Learners learn about energy and nutrient flow in various biosphere climates and environments. They learn about herbivores, carnivores, omnivores, food chains and food webs, seeing the interdependence between producers, consumers and...
eSchool Today
E School Today: What Is an Ecosystem?
Learn about all the different levels of ecosystems, from the living things under a rock, up to a rainforest biome. Explains the levels of organization within an ecosystem, the different types of biomes, food chains and trophic levels,...
Other
University of Delaware: Chemosynthesis.
An explanation of how in the deep sea, where the sun's rays never reach, organisms make food from chemicals, a process called chemosynthesis.
NOAA
Noaa: Estuaries 101 Curriculum: Nutrients in an Estuary
An overload of nutrients, called eutrophication (Greek for "good-nutrition"), can be harmful to estuaries. This phenomenon is also referred to as "over-enrichment," or "nutrient pollution". Students will investigate the range of...
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