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- Steel (28384 bytes)
3: ...iron, but is also more [[brittle]]. One classical definition is that steels are iron-carbon alloys wit...
5: ... [[plasticity (physics)|plastically]] formed (pounded, rolled, etc.).
8: ...l><sub>2</sub></small>— [[Pyrite]]. Iron oxide is a soft [[sandstone]]-like material with limite...
11: ...similarly soft and metallic but can dissolve considerably more carbon (as much as 2.04 wt% carbon at 1...
13: ...ry similar unit cell structure to austenite, and identical chemical composition. As such, it requires... - Cleopatra VII of Egypt (8634 bytes)
4: ...l name, "Cleopatra Thea Philopator" means "the Goddess Cleopatra, Beloved of Her Father."
6: ...ly '''Cleopatra''', all of her similarly-named predecessors having been largely forgotten. Cleopatra w...
9: ...lowing the deaths of her brothers she named her eldest son co-ruler as Ptolemy XV [[Caesarion]] ([[44 ...
10: ...ge:The-cleopatra2.jpg|thumb|250px|left|Image provided by [http://classroomclipart.com Classroom Clip A...
11: ... seeking sanctuary, Ptolemy had him murdered in order to ingratiate himself with Caesar. Caesar was so... - Mae Jemison (5527 bytes)
1: ...' blasted into orbit aboard the [[Space Shuttle Endeavour]], [[September 12]], [[1992]], she was the f...
5: ...ysician]], teacher and [[astronaut]], she has a wide range of experience in technology, engineering, a...
9: ...ldren, was born on [[October 17]], [[1956]], in [[Decatur, Alabama]] and raised in [[Chicago, Illinois...
11: ...B. in African and Afro-American Studies. She attended [[Weill Cornell Medical College|Cornell Medical ...
13: ... Share, (TM) an international science camp for students ages 12 to 16, that utilizes an experiential c... - Actinium (7046 bytes)
2: {| border="1" cellpadding="2" cellspacing="0" align="right...
5: {| align="center" border="0"
20: | [[Chemical series]] || [[Actinide]]s
25: | [[Density]], [[Mohs hardness scale|Hardness]]
39: | [[van der Waals radius]] || n/a pm - Artery (6875 bytes)
3: ...known as the ''media''. This "middle layer" is made up of [[smooth muscle]] cells and elastic tissue....
9: ...ow, mean [[systemic]] pressures typically being under 100 mmHg, about 1.8 lbf/in², above surround...
11: ...rgic, other locally produced peptides, nitrous oxide, etc. (See epinephrine, norepinephrine, alpha and...
13: ...ssure, i.e. Systolic vs. Diastolic difference, is determined primarily by the amount of blood ejected ...
15: ...aturation increases and [[carbon dioxide]] levels decrease. [[Hemoglobin]] molecules within [[red blo... - Heart (10132 bytes)
1: ...Image:Heart_crca.jpg|thumb|right|230px|Image provided by [http://classroomclipart.com Classroom Clip A...
3: ... language|Greek]] ''kardia'' (καρδια) for "heart".
7: ... a sac known as the [[pericardium]] and is surrounded by the [[lung]]s. In adults, it weighs about 300...
9: A thick muscular wall, the [[septum]], divides the right atrium and ventricle from the left atr...
15: ...takes places and the blood releases [[carbon dioxide]] into the lung cavity and picks up [[oxygen]]. T... - Pancreas (4781 bytes)
11: ...ncreas and empties into the second part of the duodenum at the [[ampulla of Vater]]. The [[common bil...
13: ...ry]]. Venous drainage is via the [[pancreaticoduodenal veins]] which end up in the [[portal vein]]. ...
16: [[Image:Pancreas.jpg|thumb|250px|The duodenum and pancreas (stomach removed).]]</div>
23: ...in [[bicarbonate ion]]s and are [[alkaline]] in order to neutralize the acidic [[chyme]] that the stom...
24: ...]]s secreted by cells in the [[stomach]] and [[duodenum]], in response to distension and/or food and w... - Adrenal gland (7544 bytes)
4: ...OOS2_339A.jpg|thumb|100px|Human Body Clipart provided by [http://classroomclipart.com Classroom Clip A...
11: ...noradrenaline, respectively). Medullary cells are derived from the [[embryo]]nic [[neural crest]] and,...
13: ...le effects of epinephrine and norepinephrine include increased [[heart rate]], [[vasoconstriction|bloo...
20: The cortex can be divided into three distinct layers of [[biological_tissu...
28: Pregnenolone can then be either dehydrogenated to [[progesterone]] or hydroxylated t... - Ceramics (15941 bytes)
7: ...rthenware and porcelain to decorative tiles and modern sculptures, reflecting both functional and aest...
10: ...cement, leading to more uniform and sophisticated designs.
17: *Hand-Building: This includes pinching, coiling, and slab building. It's one o...
19: ...is popular for making bowls, vases, and other rounded forms.
21: ... making it easier to produce multiple copies of a design. - Calligraphy (20084 bytes)
2: ...ecorative [[writing]]. A style of calligraphy is described as a ''hand''.
4: ...d [[epigraphy]]. Epigraphy is a branch of the broader study of ancient handwriting in more general ter...
8: ...dating back to the earliest day of history, and widely practiced throughout [[China]] to this day. Alt...
10: ...34269;, all meaning "the way of writing") is considered an important art in [[East Asia]] and the most...
12: ...he Prime Minister [[Li Si]] drew up an official index of characters and unified the written form for t... - Greek language (35285 bytes)
9: '''Modern Greek'''
13: ...story of some 3,000 years. It is symbolically divided in four historical periods:
17: ...n the armies and conquered territories of [[Alexander the Great]], but after the [[Hellenistic]] colon...
21: ...poken by approximately 15 million speakers worldwide, most of whom live in [[Greece]].
32: ... since the [[2nd millennium BC]]. The earliest evidence of this is found in the [[Linear B]] tablets d... - Ptolemy (10609 bytes)
5: ... manuscripts (hence its familiar name) and only made available in Latin translation (by [[Gerard of Cr...
7: ...modern system of constellations, but unlike the modern system they did not cover the whole sky.
11: ...ar circle). He put the meridian of 0 longitude at the most western land he knew, the Canary Isla...
13: ...|thumb|300px|Ptolemy System Explained. Image provided by [http://classroomclipart.com Classroom Clipar...
14: ...f latitude from the Arctic to the East-indies and deep into Africa; Ptolemy was well aware that he kne... - Geography (8541 bytes)
1: [[Image:Environment_09.jpg|thumb|250px|Image provided by [http://classroomclipart.com Classroom Clip A...
2: ...φειν'' ("to write," as in "to describe").
11: ...dun maintained the Greek and Roman techniques and developed new ones.
13: ...s]] revived a desire for both accurate geographic detail, and more solid theoretical foundations. This...
15: ...]], as well as [[economics]], [[sociology]] and [[demographics]]. - Nile (13738 bytes)
12: ... River|Amazon]] still remains the subject of much debate. This is, for the most part, due to two reaso...
24: ...lthough the lake itself has feeder rivers of considerable size from the other [[Great Lakes (Africa)|G...
26: ...Abyad, or the [[White Nile]], from the clay suspended in its waters. From there, the river flows to [...
32: ...[[:Image:Nile River and delta from orbit.jpg|Nile delta]])]]
40: ...he Nile in Sudan, looking north across the Sahara Desert towards Lake Nasser and Egypt. Photograph IS... - Age of the Earth (20052 bytes)
1: ...difficult to define. This article describes the modern dating methods used to arrive at the age of the...
4: ...ved in a similar date, and some today continue to defend [[young earth creationism]] (see [http://www....
6: Few people had conceived the idea of a time that stretched far into the past befor...
9: ...of [[Russia]]n science, was one of the first to undertake this exercise, suggesting in the mid-[[18th ...
11: ...h]] naturalist the [[Georges-Louis Leclerc, Comte de Buffon|Comte du Buffon]] tried to obtain a value ... - Antarctica (14761 bytes)
4: ...near the Earth's [[North Pole]] on the opposite side of the planet.
8: ...so the continent with the highest average [[altitude]], and the lowest average [[humidity]] of any con...
15: ...he continent, but [[ice]] there can last for extended time periods. Nearly all of Antarctica is cover...
24: ...ea is called [[Western Antarctica]] and the remainder [[Eastern Antarctica]], since they correspond ro...
30: ...ons, particularly those close to the continent, made territorial claims in the [[20th century]]. These... - Thebes, Egypt (3900 bytes)
1: ...age:Ancient_eygpt-1.jpg|thumb||170px|Clipart provided by <br> [http://classroomclipart.com Classroom C...
2: ... the seat of government moved to the [[Nile Delta|Delta]]. Its archaeological remains offer a striking...
4: ...of Zeus" ([[Zeus]] being the god whom the Greeks identified with [[Amun]]).
6: ...he name ''Thebes'' is often mistakenly thought to derive from the Greek as there is a city in Greece w...
20: *[[Deir al-Madinah]] (workers' village) - Alexander the Great (42049 bytes)
2: ...erTheGreat_Bust.jpg|thumb|right|[[Bust]] of Alexander III in the [[British Museum]].]]
4: ... as the [[Middle-Persian]] literature as '''Alexander the Cursed''' due to his burning of the Persian ...
6: ...ady during his lifetime, and especially after his death, his exploits inspired a literary tradition in...
9: ...[Aristotle]] was Alexander's tutor; he gave Alexander a thorough training in rhetoric and literature a...
11: ...racles]] through [[Caranus]] and his mother descended from [[Aeacus]] through [[Neoptolemus]] and [[Ac... - Pythagoras (10747 bytes)
6: ...ut his life and teachings. Pythagoras and his students believed that everything was related to [[math...
11: ...center. He opened his school to men and women students alike. They called themselves the Mathematikoi...
13: ...y infer from this that participants required some degree of wealth and leisure to join the inner circl...
17: ...e bad." Others were more cryptic: "What is the [[Delphic oracle]]?" "The [[tetraktys]], in which the ...
19: ...p joy and love" (excerpt from the book ''The extended circle'', by Jon Wynne-Tyson). - Pytheas (6447 bytes)
1: ...nd 320 BCE. Pytheas was the first Graeco-Roman to describe the [[Midnight Sun]], the [[Polar Aurora|au...
4: ...e Moon. In northern [[Spain]], he studied the [[tide]]s, and may have discovered that they are caused ...
6: ...es, Land's End, Plymouth, Isle of Man, Outer Hebrides, Orkneys, Iceland, Britain's east coast, Kent, [...
8: ... took advantage of a temporary lapse in the blockade, known to have taken place around the time he tra...
10: ...ek as ''Prettanike'', which [[Diodorus]] later rendered ''Pretannia''. This supports theories that the...
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