Encyclopedia of Earth
Encyclopedia of Earth: Physics & Chemistry: Nitrate
Discusses the chemistry of nitrate, the negative agricultural effects of too much nitrate in soil and in water sources, its toxicity to plants and livestock, and the impact on human health.
National High Magnetic Field Laboratory
Magnet Academy: Peter Debye
Peter Debye carried out pioneering studies of molecular dipole moments, formulated theories of magnetic cooling and of electrolytic dissociation, and developed an X-ray diffraction technique for use with powdered, rather than...
Encyclopedia of Earth
Encyclopedia of Earth: Physics & Chemistry: Methane
Article explaining what methane is, its impact as a greenhouse gas on global warming, and natural and man-made sources of methane. (Published: April 30, 2010)
Encyclopedia of Earth
Encyclopedia of Earth: Physics & Chemistry: Mass
Defines inertial and gravitational mass, their scientific history, formulas used in their calculation, the definition of weight, units used for mass, and mass as perceived in the theory of special relativity.
Other
Washington University: Hemoglobin and the Heme Group:
This site from the Department of Chemistry at the Washington University provides a deetailed study of the role of hemoglobin in blood physiology. The article is somewhat in-depth, complete with pictures, charts, and a bibliography.
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...
US Geological Survey
Usgs: The Effects of Acid Rain
Geology and chemistry of acid rain effects. Lots of building and monument pictures showing acid rain damage. Be sure to follow the "next" link at bottom of each page.
Royal Society of Chemistry
Visual Elements/history
A history and description of the modern periodic table, including its early origins, many contributors and later additions.
CK-12 Foundation
Ck 12: Conservation of Energy
[Free Registration/Login may be required to access all resource tools.] Students investigate how all types of energy, including work, relate to each other and are conserved in a closed system.