| Biogeochemical Cycles |
| The Carbon Cycle |
| | A Trip Around the Carbon Cycle
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| | From the site: "This site will Illustrate the dynamic role of carbon and its compounds in daily life, demonstrate that biology and chemistry are interrelated rather than separate studies, demonstrate that individual atoms "live" forever and can become part of many living and nonliving materials, and ortray the dynamic nature of chemical change."
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| | Carbon Cycle Tutorial
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| | This tutorial shows how carbon is cycled and stored within Earth's environment. |
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| | Carbon
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| | Structural information about carbon
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| | An Element on the Move
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| | This interactive game puts you in charge of one of the basic building blocks of life: an atom of carbon. |
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| | Carbon Cycle Tutorial
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| | This tutorial explores how the increased concentrations of CO2 contribute to global warming.
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| | Carbon Cycle - MGH
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| | A great illustrated overview of the carbon cycle - from McGraw-Hill. |
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| | Understanding the Global Carbon Cycle
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| | carbon is what we (as well as all of the other plants and animals on earth) are made of, but in the form of carbon dioxide (CO2), it is also the major greenhouse gas released to the atmosphere. Learn more about the Carbon Cycle at this great site from the Woods Hole Institute. |
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| | Carbon is 4 Ever
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| | A wonderfully creative site which blends a multimedia game with research : "Your name is Bond...Carbon Bond. Through a series of spy files and missions, you must gather information and learn about carbon and its compounds. If you play shrewdly, you will be able to gather clues that will eventually let you pit your skills against the final challenge. Have you got what it takes?"
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| | Exploring Carbon
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| | From the Exploring the Material World site, a great article about carbon and its structure. |
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| | Carbon Cycle
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| | Nicely illustrated site, with information on Carbon in the biosphere, lithosphere, atmosphere, hydrosphere, and soil. Click on the British Flag to read this site in English! |
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| | Carbon Cycle Animation
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| | This great animation displays plant growth on land and in the ocean over a period of three years - and links this growth to the carbon cycle. |
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| | The World of Carbon
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| | From the BBC, great learning units on Naming organic compounds and Reactions of carbon compounds. |
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| | Cycles - Carbon
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| | Basic facts and a great illustration on the Carbon Cycle. |
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| The Nitrogen Cycle |
| | Nitrogen Cycle Tutorial
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| | This animated tutorial examines how atmospheric nitrogen is converted to a form that can be used by plants and animals, and then returned to the atmosphere.
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| | The Nitrogen Cycle - FOPG
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| | The nitrogen cycle represents one of the most important nutrient cycles found in terrestrial ecosystems. Nitrogen is used by living organisms to produce a number of complex organic molecules like amino acids, proteins, and nucleic acids. |
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| | Nitrogen
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| | Basic discussion of the nitrogen atom and its function.
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| | Nitrogen Cycles Project
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| | A great site exploring the complex processes that move, transform and store chemicals in the geosphere, atmosphere, hydrosphere, and biosphere. |
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| | Nitrogen Cycle - MGH
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| | An illustrated overview of the nitrogen cycle. |
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| | Nitrogen Cycle
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| | A great animated demonstration - click on the image to reveal the processes, sources and nitrogen states within the nitrogen cycle. |
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| | Cycles - Nitrogen
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| | Basic facts and a great illustration of the Nitrogen Cycle. |
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| | Animated Nitrogen Cycle
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| | The nitrogen cycle has many links. The series of interconversions shown here is only one possible example of how nitrogen might move through the cycle. |
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| The Sulfur Cycle |
| | Sulfur Cycle Tutorial
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| | A great animated tutorial that explores how the atmospheric cycle for sulfur produces acid rain. |
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| | Sulphur Cycle
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| | An illustrated overview of the sulfur cycle and the three separate chemical reactions involved. |
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| | Cycles - Sulfur
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| | Basic information and a great illustration of the sulfur cycle. |
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| | Animation of the Sulfur Cycle
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| | A colorful demonstration of this important cycle in nature. |
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| Water |
| | The Chemistry of Water
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| | A fabulous tutorial on water chemistry from the University of Arizona. |
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| | Water - Life's Little Essential
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| | From PBS Nova, an exploration of water as the essential component for life. |
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| | Water Structure and Behavior
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| | While liquid water (H2O) is often perceived to be pretty ordinary, it is the most remarkable substance. Although we drink it, wash, fish and swim in it, and cook with it (although probably not all at the same time), we nearly always overlook the special relationship it has with our lives. |
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| | Water Chemistry Basics
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| | An introduction to water, including sections on the four measurable properties that are commonly used to characterize its chemistry: pH, buffering capacity, general hardness and salinity |
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| | Water is a Chemical
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| | An introductory tutorial from Sweet Briar College. |
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| | Electrolysis of Water
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| | The process by which we generate hydrogen (and oxygen) from water is called electrolysis. Learn about it here! |
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| | The Unique Properties of Water
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| | A nice discussion of polarity and hydrogen bonding. |
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| | Chemical Properties of Water
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| | The chemical properties of water and their influence on the behavior of biological molecules. Learn about water as a solvent, and its relationship to acids, bases, pH, and hydrogen ion exchange |
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| | Water Properties
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| | What are the physical and chemical properties of water that make it so unique and necessary for living things? Find out here. |
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| | Hydrogen Bonding in Water
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| | This tutorial provides interactive 3D representations of water molecules and illustrates how the arrangement of the molecules in water and ice differ and the molecular details of oil droplet formation in water. |
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| | Properties of Liquids
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| | Learn all about Critical Temperature and Critical Pressure, Surface Tension, Viscosity, Hydrogen Bonding & the Anomalous Properties of Water.
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| Organic Compounds |
| | Chemystery - Organic Compounds
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| | A comprehensive online resource! "Organic chemistry is the study of the properties of the compounds of carbon that are organic. All carbon compounds except for a few inorganic carbon compounds are organic." Topics include Carbohydrates, Lipids, Proteins, Nucleic Acids, Hydrocarbons, Alcohols, Ethers ... and much more!
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| | Molecules of Life
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| | Discussions and illustrations of the following molecule types: Amino Acids, DNA Molecules, Sugar Molecules, and Lipids
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| | Molecules
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| | Basic definition of molecules, and a discussion of carbon, hydrogen, oxygen and nitrogen's role in building virtually all molecules.
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| Chemistry of Life: Hydrogen |
| | Hi! Hydrogen
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| | Find out all about this element from this fabulous ThinkQuest site! |
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| | Chemical of the Week - Hydrogen
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| | Properties of Hydrogen and its uses. |
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| | Hydrogen
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| | Basic discussion of the hydrogen atom and its function.
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| | Fusion of Hydrogen
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| | This tutorial demonstrates the process by which hydrogen nuclei fuse to form helium nuclei. This nuclear reaction fuels the sun and stars, and is the first step in the synthesis of heavier elements. |
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| Chemistry of Life: Oxygen |
| | Oxygen
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| | Basic discussion of the oxygen atom and its function.
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| | The Oxygen Cycle
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| | Basic facts and a great illustration of the oxygen cycle. |
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