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- Industrial Revolution (30001 bytes)
1: ...t of all-metal machine tools in the first two decades of the nineteenth century enabled the manufactur...
3: ...wth of the [[internal combustion engine]] and the development of [[Electric power|electrical power gen...
5: ...red to the [[Neolithic revolution]], when mankind developed [[agriculture]] and gave up its [[nomad|no...
10: ...he accompanying development of international [[trade]], creation of [[financial market]]s and accumula...
12: ...h often imposed tolls and [[tariff]]s on goods traded among them. - Ear (6659 bytes)
1: ...ge:Ear.jpg|thumb|A left [[human]] ear. Image provided by [https://classroomclipart.com Classroom Clip ...
3: An '''ear''' is an organ used by an animal to detect [[sound]]. The term may refer to the entire ...
7: ...ncluding [[human]]s, have two ears, one on each side of the head.
10: ... waves. Many [[mammal]]s can move the pinna in order to focus their hearing in a certain direction, i...
12: ...umb|250px|left| Photography of a baby. Image provided by [http://classroomclipart.com Classroom Clipar... - Vertebra (3942 bytes)
5: ...ions comprise the remaining 24, and are grouped under the names ''cervical'' (7 vertebrae), ''thoracic...
6: ...egion, or it may be diminished in one region, the deficiency often being supplied by an additional ver...
15: ...he '''intervertebral foramina''', one on either side, for the transmission of the spinal nerves and ve...
22: ''Note: For more detailed information, see [[Cervical vertebrae]]''
24: ...are the vertebrae that allow the [[neck]] so much rotation. Specifically, the atlas allows the [[skull]] to ... - Arm (7276 bytes)
1: ...mmal, specifically the segment between the [[shoulder]] and the [[elbow]]. '''Arm''' may also refer ...
5: ...lder joint allows for movement of the arms in a wide circular plane, while the presence of two forearm...
8: ===The shoulder===
9: ...|400px|Diagram of the muscles in the arm and shoulder]]
11: ... [[sternoclavicular]] joint, while the scapula slides across the posterior chest wall via the "scapulo... - Tooth (14790 bytes)
1: <div style="float:right; border-style:solid; border-width:1px; margin:1ex; padding:.5ex; background-...
9: ... of teeth is supposed to be white, but it heavily depends on the person, and how well they care for th...
10: ...mb|200px|left|Section of a human Tooth Image provided by [http://classroomclipart.com Classroom Clip A...
11: ...s called the species' [[dentition]]. [[Dentistry|Dentists]] sometimes refer to the inner surface of t...
13: <div style="float:right; border-style:solid; border-width:1px; margin:1ex; padding:.5ex; background-... - Legume (2428 bytes)
8: ...''' in the botanical sense; a peanut is an '''''indehiscent''''' legume, that is, one that does not sp...
10: ...[[crop rotation]] to replenish soil that has been depleted of [[nitrogen]].
12: ...n of oils for industrial uses. Grain legumes include [[bean]]s, [[lentil]]s, [[lupin]]s, [[pea]]s, [[p... - Earth (30908 bytes)
4: ...iker's Guide reference in here. It's been done to death. Find a gem with which to improve the article ...
7: ...l planet]]s, and the only planetary body that [[modern science]] confirms as harboring [[life]]. The p...
9: ... a variant puts the cross atop the circle ([[Unicode]]: ⊕ or ♁).
14: ... diameter of approximately 12,742 km. The maximum deviations from this are the highest point on Earth ...
17: ... other [[terrestrial planets]], is chemically divided into an outer [[silicon|siliceous]] solid [[Crus... - Babe Ruth (55357 bytes)
4: ...the ''[[Roaring Twenties]]'' as the fan base expanded significantly and triggered major expansion of n...
7: ...ed above the saloon they owned and operated on Camden Street. Kate would walk to her father's home eac...
9: ...ry recalled how their father would beat Babe in a desperate attempt to bring the boy into line, but to...
12: ... every play. One day, as his team was getting pounded, Babe started mocking his own pitcher. Brother M...
15: ...ot in such good shape. In 1914 the breakaway [[Federal League]], a rebel major league which would las... - Anaxagoras (6622 bytes)
4: ...ch he surrendered, from a fear that they would hinder his search after knowledge.
5: ...ere is no reason for the theory that he studied under [[Hermotimus]] of Clazomenae, the ancient miracl...
9: ...to love and admire him and the poet [[Euripides]] derived from him an enthusiasm for science and human...
14: ...s led him to form new theories of the universal order, and brought him into collision with the popular...
15: ...of stone torn from the earth and ignited by rapid rotation. - Sun (20830 bytes)
2: ...="margin: 0 0 1em 1em; border: 1px #aaa solid; border-collapse: collapse;" align="right" width=280px
13: ! align="left" | [[Apparent magnitude|Visual brightness]] (''V'')
16: ! align="left" | [[Absolute magnitude]]
48: ! align="left" | Density
73: ...olor="#ffffc0" colspan="2" align="center" | '''[[Rotation]] characteristics''' - Geometry (3634 bytes)
1: ...per cent. The [[Rhind Mathematical Papyrus]] also describes one of the earliest attempts at [[squaring...
3: ... but can be used in conjunction with mathematical definitions for [[point (geometry)|points]], [[line_...
5: ...truct new geometries other than the standard Euclidean version.
7: ...hey are related by a series of [[reflection]]s, [[rotation]]s, and [[translation (geometry)|translation]]s.
9: ...s)|group]] of transformations to work with (Euclidean geometry uses the inhomogeneous orthogonal tran... - Writing system (16928 bytes)
4: ...end upon prior knowledge of a given language in order to extract associated meaning.
6: ...d in some language, which can be retrieved independently of the initial act of formulation.
9: :* a set of defined base elements or [[symbol]]s (termed charact...
10: ...assign [[meaning]]s to the base elements, their ordering, and relations to one another;
12: ...ally visually, but tactile systems have also been devised). - Meteorology (19082 bytes)
12: ...d in [[1667]] by [[Robert Hooke]], while [[Horace de Saussure]] completed this list of the most import...
14: ... was also the first American to keep accurate and detailed records of weather conditions on a daily ba...
16: ...s was understood. Early in the 20th century this deflecting force was named after [[Gaspard-Gustave C...
18: ...lowed exchange of weather information with unprecedented speed.
20: ... [[front (meteorology)|front]]s, that is, sharply defined boundaries between air masses. - Anemometer (11426 bytes)
1: ...6 m) lengths. The wire (4 conductors running inside a shield) runs along the rightmost leg of the 3 l...
3: ...έτρον, a measure), is a device for measuring either the [[wind speed|velocit...
5: Anemometers may be divided into two classes, (1) those that measure the [[v...
7: ..., of the velocity of the wind to that of the cups depends very largely on the dimensions of the cups a...
9: ...s vertical, but with this subdivision the axis of rotation must be parallel to the direction of the wind and... - Mercury (planet) (22924 bytes)
1: ...anges from −0.4 to 5.5 in [[apparent magnitude]]; Mercury is sufficiently "close" to the Sun tha...
3: ...not realized it could alternately appear on one side of the Sun and then the other. It was called [[He...
12: ...aded [[Impact crater|crater]]s, where it has been deposited by [[comet]] impacts and/or gases arising ...
16: ...idal bulge]]s, raised by the [[Sun]] (the Sun's tides on Mercury are about 17% stronger than the Moon'...
28: ...of Earth compresses the planet and creates a high density. Mercury has only 5.5% of Earth's mass. The ... - Civilization (29205 bytes)
5: ...r working small [[horticulture|horticultural]] gardens. When used in this sense, civilization is an ex...
7: ...lex and city-dwelling, or simple and tribal. This definition is often perceived as less exclusive and ...
9: ...y back in Civilization after being lost in the wilderness for 3 weeks." Additionally, it is used in th...
11: ...zed" behavior is contrasted with "barbaric" or crude behavior. In this sense, civilization implies sop...
17: ... to produce a surplus of food that will not be needed for their own subsistence. - Agriculture (19147 bytes)
3: ...arming''', while scientists, inventors and others devoted to improving farming methods and implements ...
11: ...red to as [[factory farming]]) long prevalent in "developed" nations and increasingly so elsewhere, wh...
15: ...[[timber]] or lumber, [[fertilizer]]s, [[animal hides]], [[leather]], industrial chemicals ([[starch]]...
17: ...chanization has decreased labor requirements. The developing world generally produce lower yields, hav...
19: Modern agriculture depends heavily on engineering and technology and on... - Tornado (14220 bytes)
3: ...[[Tornado Alley]]. Although in pure number of incidences, the [[United States]] experiences more torna...
8: ...], and sometimes [[hail]] are associated with thunderstorms. Many tornadoes appear at the tail end of...
10: ...otation can intensify and form tornadoes is not understood.
12: ...mes opposite direction swirls develop under a thunderstorm. And about 1 in 100 tornadoes rotate in an ...
14: ... high wind velocity and the associated wind-blown debris. Tornadic winds have been measured well in ex... - Tropical cyclone (34538 bytes)
6: ...rom the equatorial region toward the higher latitudes.
9: ...ation]] from water vapor condensing at high altitudes. Because of this, a tropical cyclone can be thou...
11: The ingredients for a tropical cyclone include a pre-existing weather disturbance, warm tropical...
13: ...water, which provides the atmospheric moisture needed. The evaporation of this moisture is driven by t...
16: ...ons, tropical storms and a third group whose name depends on the region. - Season (10047 bytes)
2: ... [[temperate]] regions, the year is typically divided into four seasons: ''[[spring (season)|spring]]'...
4: ...n the average temperature. [[Ancient Egypt]] divided the year into three seasons, the season of the f...
6: ...winter through mid summer, depending upon [[latitude]]). Areas with a [[Mediterranean climate]], such ...
10: <table align="right" border="1" cellpadding="5" cellspacing="0" width="372" ...
13: ...rctic winter]]. In addition to the density of incident light, the [[dissipation]] of light in the [[Ea...
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