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Topic: Earth (chemistry)


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In the News (Mon 22 Dec 14)

  
  Earth (chemistry) - Wikipedia, the free encyclopedia
The chemical term earths was historically applied to certain chemical substances, once thought to be elements, and this name was borrowed from one of the four classical elements of Plato.
"Earths" later turned out to be chemical compounds, albeit difficult to decompose, such as rare earths and alkaline earths.
In fact, earths are metallic oxides, and the corresponding metals were clasified into the corresponding groups: rare earth metals and alkaline earth metals.
en.wikipedia.org /wiki/Earth_(chemistry)   (98 words)

  
 AllRefer.com - earth, in chemistry, Compound & Element (Compounds And Elements) - Encyclopedia   (Site not responding. Last check: 2007-11-05)
earth, in chemistry, metallic oxide not readily reducible by chemical means, e.g., alkaline earths, rare earths, and alumina.
The name is also applied to certain absorbent clays, e.g., fuller's earth, and to other compounds, e.g., carbonates, silicates, or hydroxides.
Earth was one of the four "roots" of the Greek philosopher Empedocles, the other three being air, water, and fire.
reference.allrefer.com /encyclopedia/E/earth-che.html   (199 words)

  
 Earth   (Site not responding. Last check: 2007-11-05)
Earth is the third closest planet to the Sun.
The earth is surrounded by an envelope of gases, mostly oxygen and nitrogen, called the atmosphere.
Earth = the abode of mortals (as contrasted with heaven or hell).
kosmoi.com /Science/Earth   (943 words)

  
 Chemistry of the Earth (from geologic sciences) --¬† Encyclop√¶dia Britannica
Included in the Earth sciences are the geological, the hydrological, and the atmospheric sciences, which are concerned respectively with the nature and behavior of the Earth itself, the water, and the air.
Chemistry has been used, for example, to make stronger metals, to enrich soil for growing crops, to destroy harmful bacteria, and to measure levels of pollution in the...
Focuses on the study of the earth using the data on the atmospheric chemistry, hydrological and energy cycle, land cover and use, the ozone gas, and causes of natural hazards.
www.britannica.com /eb/article?tocId=14177   (904 words)

  
 Episode 18 - The Chemistry of Earth   (Site not responding. Last check: 2007-11-05)
If this substance is concentrated and is considered valuable, it is called a(n) ________.
Iron is the most common element in the ``whole'' earth.
The more dense iron in found in greater amounts near the core; the less dense silicates are found near the surface.
www.woodrow.org /teachers/chemistry/exchange/topics/WOC/woc18.html   (434 words)

  
 UCSD Earth Sciences: Majors & Minors   (Site not responding. Last check: 2007-11-05)
Lower-division requirements are the same for all majors and are designed to provide the foundations in mathematics, physics, chemistry and biology that are essential in modern quantitative earth sciences disciplines.
Emphasis is placed on the fundamental observations that allow geoscientists to understand better the past history of the planet, the energetics of its evolution, and the major "cycles" (e.g., water, carbon) that characterize and control planetary-scale changes on a broad range of time scales.
A minor in earth sciences consists of twenty-eight units of earth science courses, at least twenty of which must be upper-division, focused on geology, geochemistry, or geophysics.
earthsciences.ucsd.edu /major.html   (794 words)

  
 Read about Earth science at WorldVillage Encyclopedia. Research Earth science and learn about Earth science here!   (Site not responding. Last check: 2007-11-05)
Earth science (also known as geoscience, the geosciences or the Earth Sciences), is an all-embracing term for the sciences related to the planet
Gaia theories explain the behaviour of the Earth system in terms of the influence of the biosphere.
In earth science, data usually plays a critical role in testing and formulating hypotheses.
encyclopedia.worldvillage.com /s/b/Earth_science   (336 words)

  
 Chemistry | UW-Green Bay Undergraduate Catalog 2005-2006
The UW-Green Bay chemistry program is an integrated progression of lecture and laboratory instruction that is designed to provide students with the skills needed by chemists today.
Chemistry majors must combine their studies with an interdisciplinary major or minor.
A chemistry major combined with a minor in human biology is excellent training for students aiming for professional schools in the health sciences, medicine, dentistry, and veterinary medicine.
www.uwgb.edu /catalog/undrgrad/chem.htm   (414 words)

  
 ScienceDaily -- Browse Topics: Science/Earth_Sciences/Atmospheric_Chemistry   (Site not responding. Last check: 2007-11-05)
National Center for Atmospheric Research Atmospheric Chemistry Division - The overall scientific goal of ACD is to identify and quantify the natural and anthropogenic processes that regulate the chemical composition of the troposphere and middle atmosphere and to assess future changes caused by human activities.
International Global Atmospheric Chemistry Project - Aimed at developing a fundamental understanding of the processes determining atmospheric composition, understanding interactions between atmospheric chemical composition and physical, biospheric and climatic processes, and to predict the impact of natural and anthropogenic forcings on the chemical composition of the atmosphere.
Journal of Atmospheric Chemistry (JAC) - The Journal of Atmospheric Chemistry is devoted to the study of the chemistry of the Earth's atmosphere, the emphasis being laid on the region below about 100 km.
www.sciencedaily.com /directory/Science/Earth_Sciences/Atmospheric_Chemistry   (1928 words)

  
 Physics and Chemistry of the Earth.   (Site not responding. Last check: 2007-11-05)
R.A. Akmaev, Modeling the cooling due to CO increases in the mesosphere and lower thermosphere, Physics and Chemistry of the Earth 27 (6-8) (2002) pp.
Antretter, M. Fuller, Paleomagnetism and rock magnetism of martian meteorite ALH 84001, Physics and Chemistry of the Earth 27 (25-31) (2002) pp.
Arattano, Editorial(s), Physics and Chemistry of the Earth 27 (36) (2002) pp.
www.elsevier.com /cdweb/journals/14747065/viewer.htt?viewtype=authors   (710 words)

  
 National chemistry week celebrations explore "Earth's Atmosphere and Beyond!"
Chemistry has enhanced plane construction with new plastic and composite materials that are light, strong and durable.
At each station, there will be hands-on chemistry demonstrations to participate in and a stamp for the passport.
There are many more National Chemistry Week celebrations going on in cities across the country during October in celebration of this year's theme, "Earth's Atmosphere and Beyond!" More information about NCW, including a nationwide poster contest for Kindergarten - 12th grade students, can be found at chemistry.org/ncw.
www.eurekalert.org /staticrel.php?view=acs22101303   (661 words)

  
 Javorie.com :: Science :: Earth Sciences :: Atmospheric Chemistry   (Site not responding. Last check: 2007-11-05)
At the University of York, Ontario, CAC was formed to foster cooperative research in atmospheric chemistry, to take a leading role in Canada in the education of a new generation of qualified atmospheric chemists, and to provide a communications link between York atmospheric chemists and the national and international atmospheric chemistry community.
The overall scientific goal of ACD is to identify and quantify the natural and anthropogenic processes that regulate the chemical composition of the troposphere and middle atmosphere and to assess future changes caused by human activities.
Carries out broadly based research on the chemistry of marine waters and the marine atmosphere, and maintains a high-quality well-rounded graduate program leading to the MS and Ph.D. degrees.
www.exil.sk /directory/index.php/Science/Earth_Sciences/Atmospheric_Chemistry   (1361 words)

  
 Resource: The World of Chemistry
The World of Chemistry is appropriate for students taking high school or college chemistry, from introductory to advanced levels, and is easily applicable to different teaching approaches.
The relationships of chemistry to the other sciences and to everyday life are presented.
The earth's atmosphere is examined through theories of chemical evolution; ozone depletion and the greenhouse effect are explained.
www.learner.org /resources/series61.html   (550 words)

  
 Whole Earth: Green Chemistry's Maven
Green chemistry is a way of bringing back the perspective that chemicals aren't all bad.
Of reminding citizens that chemistry is the very basis of the social and economic life of virtually all industrialized nations.
So we're trying, through green chemistry, to put chemistry in a very positive light: to show that it can actually be used to solve even our most pressing environmental issues, through the development of alternative technologies.
www.wholeearth.com /ArticleBin/302.html   (740 words)

  
 Properties of the Alkaline Earth Metals - Element Chemistry   (Site not responding. Last check: 2007-11-05)
The alkaline earths are the elements located in Group IIA (second column) of the periodic table.
The alkaline earths possess many of the characteristic properties of metals.
The two valence electrons are not tightly bound to the nucleus, so the alkaline earths readily lose the electrons to form divalent cations.
chemistry.allinfoabout.com /features/alkaline.html   (120 words)

  
 Whole Earth: Green Chemistry - chemical ecology
The final hurdle to fully accepting that green chemistry principles will be the guidelines, indeed the impetus, for scientists engaged in the discipline of chemistry is the education of the next generation of chemists.
Synthetic chemistry should be designed to maximize the incorporation of all materials used in the process into the final product.
Wherever practicable, synthetic chemistry should use and generate substances that possess little or no toxicity to human health and the environment.
www.findarticles.com /p/articles/mi_m0GER/is_1999_Winter/ai_58458664   (1161 words)

  
 Science, Earth Sciences, Atmospheric Chemistry   (Site not responding. Last check: 2007-11-05)
Atmospheric Chemistry Program (U.S. Research into regional and continental chemistry and the fate of tropospheric air pollutants, extracontinental and global chemistry and the fate of tropospheric air pollutants, and aerosol genesis..
The Journal of Atmospheric Chemistry is devoted to the study of the chemistry of the Earth's atmosphere, the emphasis being laid on the region below about 100 km..
The impact of subsonic aircraft emissions on tropospheric NOx and ozone budgets has been studied at a preliminary level with models that focus on upper tropospheric chemistry and are acknowledged to be limited with respect to treatment of transport and the tropospheric NOx budget.
klevze.si /browse/Science/Earth_Sciences/Atmospheric_Chemistry   (1326 words)

  
 Physics and Chemistry of the Earth.   (Site not responding. Last check: 2007-11-05)
R.J. Nicholls, Analysis of global impacts of sea-level rise: a case study of flooding, Physics and Chemistry of the Earth 27 (32-34) (2002) pp.
Beig, Overview of the mesospheric temperature trend and factors of uncertainty, Physics and Chemistry of the Earth 27 (6-8) (2002) pp.
M.T. Lewchuk, R. Douglas Elmore, M. Evans, Remagnetization signature of Paleozoic sedimentary rocks from the Patterson Creek Mountain anticline in West Virginia, Physics and Chemistry of the Earth 27 (25-31) (2002) pp.
www.elsevier.com /cdweb/journals/14747065/viewer.htt?viewtype=keywords   (736 words)

  
 Chemists Retrieve Clues To Ancient Earth Chemistry From Cretaceous Sediments
Their results, the first high-resolution record of changes in seawater sulfate, provide a portrait of the interactions between the Earth and its atmosphere during the Cretaceous that should help scientists improve their predictions of how our climate might change as the accumulation of carbon dioxide and other greenhouse gases from human activities warm the planet.
Because much of these chemicals eventually made their way to the oceans, the seawater sulfur deposited in ocean floor sediments has proven to be a particularly good way to glimpse geological and atmospheric changes over periods of millions of years.
The scientists found that from 120 million years ago to 105 million years ago, then again from 95 million years ago to 80 million years ago, the fraction of sulfur-34 dipped even more precipitously, suggesting a sharp reduction in the amount of organic matter buried in the ocean and used by sulfate-reducing bacteria.
www.spacedaily.com /news/early-earth-04i.html   (1126 words)

  
 NASA GISS: Goddard Institute for Space Studies   (Site not responding. Last check: 2007-11-05)
The NASA Goddard Institute for Space Studies (GISS), at Columbia University in New York City, is a laboratory of the Earth-Sun Exploration Division of NASA's Goddard Space Flight Center and a unit of the Columbia University Earth Institute.
Earth is absorbing about 0.85 Watts of energy per square meter more than it radiates back to space, and a sizable chunk of that excess energy is "hiding" in the oceans.
New findings show soot may be contributing to changes near the North Pole, including increased melting of sea ice and snow and warmer atmospheric temperatures.
www.giss.nasa.gov   (378 words)

  
 Omniseek: /Science & Tech /Earth Sciences /Atmospheric Chemistry /Science: Chemistry
The atmospheric chemistry sub-group investigates high-latitude chemical reactivity through a combination of field and laboratory studies.
The Centre for Research in Earth and Space Science serves as an agent to enhance and facilitate collaborative, interdisciplinary research, with a focus on research themes that draw on expertise...
Earth is a very unique and extraordinarily complex planet.
www.omniseek.com /srch/{47557}   (293 words)

  
 [No title]   (Site not responding. Last check: 2007-11-05)
It seems fairly clear, now, that the earliest Earth was, in essence, a molten ball with an atmosphere of high-pressure steam, carbon dioxide, nitrogen, and the other products of volcanic emission from the differentiating planet.
The cooling curve of the molten Earth would have reached the critical point of water by roughly 4.2-4.4 billion years ago; then it would have rained, depositing during an unknown time period 3-4 kilometers of water over the hot crust.
This is because the early crust would have been dynamic and thin and consequently probably incapable of supporting a continental mass sufficient to reach the surface of the overlying ocean.
astrobiology.arc.nasa.gov /workshop/speakers/pace/pace_abstract.html   (1371 words)

  
 Science - Earth Sciences - Atmospheric Chemistry - Newsletter - News - Reviews - Education - Ratings
Atmospheric Chemistry Air Quality Glossary The definitions in this glossary were initially generated by the students in a senior level class studying air quality and atmospheric chemistry at Sam Houston State University during the spring of 1995 in a course entitled Environmental Science 440/Chemistry 442, AIR QUALITY.
AIDA Aerosols and Heterogeneous Chemistry in the Atmosphere We are investigating both experimentally and theoretically physical and chemical aerosol processes that contribute to the conversion of reactive trace compounds, new particle formation, cloud microphysics, and aerosol-climate interactions.
UNH Global Atmospheric Chemistry Group We are a multidisciplinary group of researchers concerned with understanding the fundamental factors (both natural and anthropogenic) which determine the chemical composition of the Earth's atmosphere.
newsletter-library.com /Science/Earth_Sciences/Atmospheric_Chemistry   (3038 words)

  
 Recent Advanced in Rare Earth Chemistry: IREC (International Rare Earth Conference) 85 Held at Zurich (Switzerland) on ...
Recent Advanced in Rare Earth Chemistry: IREC (International Rare Earth Conference) 85 Held at Zurich (Switzerland) on 4-8 Mar 85
Abstract: The international rare earth conference, IREC 85, was held from 4 through 8 March 1985 in Switzerland.
A blend of solid state and solution chemistries was a first for the conference and provided an excellent stage for discussions on the use of rare earths in glasses, ceramics, alloys, and catalysts.
www.stormingmedia.us /85/8537/A853751.html   (186 words)

  
 GCSE GEOLOGICAL EARTH SCIENCE and ATMOSPHERIC EVOLUTION Revision at Doc Brown's Chemistry Clinic. btgeoanswpb ...
The overall density of the Earth is much greater than the average density of the rock of the crust.
This is evidence that the inner layers of the Earth are made of different more denser materials from that of the crust eg the metallic core.
"The Earth's lithosphere (the crust and the upper part of the mantle) is cracked into a number of large pieces (tectonic plates) which are constantly moving at relative speeds of a few centimetres per year as a result of convection currents within the Earth's mantle driven by heat released by natural radioactive processes.
www.wpbschoolhouse.btinternet.co.uk /page21/GeoChangesANS.htm   (6411 words)

  
 Chem4Kids.com: Extra Topics: Astrochemistry
While you, the chemist, sit here on Earth you don't have to study the chemistry of Earth.
You could work with astronomers and geologists to study the chemistry of other planets and stars.
There are as many things to study on each planet we discover as there are on Earth.
www.chem4kids.com /files/etcetera_astrochem.html   (431 words)

  
 Wiley-VCH - Chemistry - A European Journal
Chemistry - A European Journal appears twice monthly and has established itself as a truly international journal with top quality contributions (2004 ISI Impact Factor 4.517).
It is the international forum for the publication of outstanding Full Papers from all areas of chemistry and related fields.
Based in Europe Chemistry increases the visibility of European chemistry and attracts authors and readers from around the world.
www.wiley-vch.de /publish/en/journals/alphabeticIndex/2111   (180 words)

  
 Internet Directory - Science / Earth_Sciences / Atmospheric_Chemistry   (Site not responding. Last check: 2007-11-05)
» Atmospheric Chemistry and Physics (ACP) Journal - An international scientific journal dedicated to the publication and discussion of high quality studies investigating the Earth's atmosphere and the underlying chemical and physical processes.
» International Global Atmospheric Chemistry Project - Aimed at developing a fundamental understanding of the processes determining atmospheric composition, understanding interactions between atmospheric chemical composition and physical, biospheric and climatic processes, and to predict the impact of natural and anthropogenic forcings on the chemical composition of the atmosphere.
» National Center for Atmospheric Research Atmospheric Chemistry Division - The overall scientific goal of ACD is to identify and quantify the natural and anthropogenic processes that regulate the chemical composition of the troposphere and middle atmosphere and to assess future changes caused by human activities.
www.i-dir.info /top/Science/Earth_Sciences/Atmospheric_Chemistry   (1568 words)

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