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| title=Radioactive potassium may be major heat source in Earth's core | publisher=UC Berkeley News | date=2003-12-10 | url=http://www.berk

...Alan M. |last2=Melvin |first2=John W. |date=2013-03-09 |publisher=Springer Science & Business Media |isbn=9781475722642 |language=en}}</ref><ref>{{Cite book |

*QA75.5-76.95 Electronic computers. Computer science Including the earth's atmosphere

* earth * earth alkaline

...s a branch of geography that studies the regions of all sizes across the [[Earth]]. It has a prevailing descriptive character. The main aim is to understand ...he [[solar system]], and even beyond. The study of systems larger than the earth itself usually forms part of [[Astronomy]] or [[Cosmology]]. The study of o

* [http://www.bbc.co.uk/sn/ BBC - Science and Nature]. * [http://www.science.gov/browse/w_123.htm Science.gov - Environment & Environmental Quality]

[[Image:Ozone-montage.png|thumb||left|upleft|100px|Ozone is a rare gas on Earth found mostly in the [[stratosphere]].]] [[Image:Oxygenation-atm.svg|thumb|right|255px|O₂ build-up in Earth's atmosphere: 1) no O₂ produced; 2) O₂ produced, but

...tion.gif|thumb|300px|A graphical distribution of the locations of water on Earth.]] ...Condensed atmospheric water can be seen as [[cloud]]s, contributing to the Earth's [[albedo]].]]

...): 85. [[:en:Digital object identifier|doi:]][http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T7W-4991S9H-7&_user=10&_coverDate=09%2F16%2F2003&_rdo ...2: 111.[[:en:Digital object identifier|doi:]][http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFR-3WJ7TVN-J&_user=10&_coverDate=07%2F15%2F1999&_rdo

...مسية <ref>NASA: [http://nssdc.gsfc.nasa.gov/planetary/ Lunar and Planetary Science]; siehe Fact Sheets</ref> ...uthors=''et al.'' |year=2001 |month= |title=Earthshine Observations of the Earth’s Reflectance |journal=[[Geophysical Research Letters]] |volume=28 |issue

[[ملف:Sun-Earth-Radiation.png|إطار|إن مقدار ما تمتصه الأرض من ال |title=Planetary Science: The Science of Planets Around Stars (1st ed.)

...F) and vaporizes forming steam at 100°C (212°F). Water occurs naturally on earth as rivers, lakes, and oceans, and falls from the clouds as rain. Water’s * WSTA Water Science and Technology Association.

* ocean The volume of salt water that covers approximately 71% of the earth’s surface and is divided into .ve principal geographic regions: the Antar * OST Of.ce of Science and Technology. A U.S. EPA of.ce.

* earthen reservoir A reservoir constructed in earth using excavated materials to form embankments. ...iquid copper water treatment product used as algicide/bactericide by Earth Science Laboratories, Inc.

...ريمان و كومبني W. H. freeman & Company لسماحهم باستعمال شاهد من كتاب الأرض Earth للمؤلف ج. س. لويس J. S. Lewis لبرس وسايفر Press and S

|publisher=Argonne National Laboratory, U.S. Department of Energy, Office of Science Laboratory |journal=Science|year=1933|volume=78

* mesosphere The level of the earth’s atmosphere that exists above the stratosphere. * science, Inc. Microchem™ Tablet chlorinator by Mooers Products, Inc. microclimate

* SAB See “Science Advisory Board (SAB).” ...Advisory Board (SAB) A group of external scientists who advise the EPA on science and policy.

...n Agency]]}}</ref><ref name="Deadly">{{cite web|url=http://www.pbs.org/now/science/smog.html|title=Deadly Smog|accessdate=2006-08-02|author= |last= |first= |a ...till 'Dilution'|accessdate=2006-02-14|author=Gershon Cohen Ph.D.|publisher=Earth Island Institute}}</ref><ref name="What">{{cite web|url=http://www.cleanoce

* AAS American Association for the Advancement of Science. * air The mixture of gases, primarily oxygen and nitrogen, that surrounds the earth and forms its atmosphere.