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- Continental drift (4518 bytes)
3: ...]. The idea of continental drift did not become widely accepted as [[theory]] until the [[1950s]] in E...
5: ... current ideas underlying concepts of continental drift.
11: == Evidence for continental drift ==
14: ...ca]], and [[Antarctica]]. There is also living evidence - the same animals being found on two continen...
16: ...Wegener]] to study what he defined as continental drift.
Page text matches
- Eye (21834 bytes)
1: ...ight or dark. More complex eyes are used to provide the [[sense]] of [[visual perception|vision]]. Ma...
9: ...es grow outward from brain cells during embryonic development, while mollusk eyes grow inward from ski...
11: ...ranged hexagonally, and which can give a full 360 degree field of vision. Compound eyes are very sensi...
16: Jumping spiders have simple eyes that are so large, supported b...
18: ...ght|thumb|300px|Eye of a Komodo Dragon.Image provided by [http://classroomclipart.com Classroom Clip A... - 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... - Continent (6440 bytes)
2: ...king Alexandria as a [[prime meridian]], they divided the ''oikoumene'' or habitable earth into three ...
13: Geographers and historians find it useful to define larger land masses connected with a [[land br...
18: ...ss_section_Earth2.jpg|thumb|250px|left|Image provided by [http://classroomclipart.com Classroom Clipar...
19: ...the Americas. These land masses are usually considered [[supercontinent]]s rather than continents, th...
21: ...inent. In the same manner, historians may subdivide Africa-Eurasia into Eurasia-[[North Africa]] and ... - Geology (12007 bytes)
3: ...d [[uranium]]. Additional economic interests include minerals such as [[asbestos]], [[perlite]], [[mic...
7: ...ween earthly and [[Theology|theological]] jurisprudence.
10: ...f the [[mountain]]s and by [[Deposition (geology)|deposition]] of [[silt]].
12: ...ks ''Peri lithōn'' by [[Theophrastus]], a student of [[Aristotle]], remained authoritative for mi...
14: ...etallica libri XII'', with an appendix ''Buch von den Lebewesen unter Tage'' (book of the creatures be... - Crust (geology) (1183 bytes)
3: ...te]]. It is cooler, harder and stronger than the deeper layers of the [[Mantle (geology)|mantle]] and...
5: ...p and is composed mainly of a light-colored, less dense rock called [[granite]].
8: *[[Continental drift]] - Tectonic plate (1989 bytes)
4: ...], which is in constant motion. This is in turn underlaid by a solid layer of mantle.
6: ...differ in thickness, with continental crusts considerably thicker than oceanic.
8: ... plates along in a process known as [[continental drift]], which is explained by the theory of [[plate te...
10: The boundaries of the plates do not coincide with those of the continents. For instance, the [... - Plate tectonics (27764 bytes)
1: ...e outermost part of the [[Earth]]'s interior is made up of two layers, the outer [[lithosphere]] and t...
3: ...ay from each other), and transform (two plates slide past one another). [[Earthquake]]s, [[volcano|vol...
5: ...r [[chemistry]], the discovery of the [[genetic code]] for [[genetics]], or [[evolution]] in [[biology...
8: ...the asthenosphere allows the tectonic plates to undergo motion in different directions.
10: ...famous. These boundaries are discussed in further detail below. - Continental drift (4518 bytes)
3: ...]. The idea of continental drift did not become widely accepted as [[theory]] until the [[1950s]] in E...
5: ... current ideas underlying concepts of continental drift.
11: == Evidence for continental drift ==
14: ...ca]], and [[Antarctica]]. There is also living evidence - the same animals being found on two continen...
16: ...Wegener]] to study what he defined as continental drift. - Supercontinent (3497 bytes)
3: ...asses connected with an [[isthmus]] are also considered a supercontinent or just a [[continent]], such...
5: ...'' to refer to a landmass consisting of all the modern continents, of which the most familiar example ...
7: ...odern southern hemisphere continents. Continental drift then brought the fragments together in a differen...
9: .... Santosh have proposed the existence of a yet older supercontinent, [[Columbia (supercontinent)|Colu...
11: Modern studies have suggested that supercontinents for... - 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... - Influenza (10335 bytes)
1: ...monly called "stomach '''flu'''" (and widely misunderstood as being instances of influenza), see [[gas...
2: ...e the causative agent of the [[Hong Kong Flu]] pandemic. ]]
4: ...ges in the virus have caused three influenza [[pandemics]] in the [[20th century|20<sup>th</sup> centu...
12: ...nza B and C because they only undergo [[antigenic drift]] and have more similarity with previous strains.
14: .... Only one H subtype and one N subtype have been identified for influenza B virus. At present, the mos... - History of science (41710 bytes)
2: Modern [[science]] is a body of verifiable [[empirical...
4: ... change is considered to be so fundamental that older inquiries are known as ''pre-scientific''. Still...
6: ...] concerns the [[Creativity|creative]] process of designing useful objects and systems, which differs ...
11: ...mphasize the view that scientific data is self-evident, value-free, and context-free.
13: ...e, and that there can be [[demarcation problem|no demarcation]] between science and any other form of ... - Earth science (5396 bytes)
2: ...stry]], and [[biology]] to build a quantitative understanding of the principal areas or ''[[Earth's sp...
6: ...h (or [[hydrosphere]]). Major subdisciplines include [[hydrogeology]] and [[Physical oceanography|phys...
12: ...ns between the [[Earth's spheres|spheres]] many modern fields take an interdisciplinary approach and t...
18: Furthermore, other modern disciplines known collectively as '''[[Earth sy...
20: *'''[[Meteorology]]''' describes, explains and predicts the [[weather]] bas... - Plant (12870 bytes)
19: ** [[Ophioglossophyta]] - adderstongues
31: ...ed to the presumed phylogenic concepts on which modern [[taxonomy]] is based.
35: [[Image:Garden-with-purple-yellow-pansy-flowers.jpg|500px|thumb...
36: ...eaves]], [[stem]]s, and [[root]]s. They also include a few of their close relatives, often called ''br...
38: ...otosynthesis]], using [[light]] and [[carbon dioxide]] to synthesize food. About 300 plant species do ... - Flower (10503 bytes)
3: ...ross the landscape. After fertilization, a flower develops into a [[fruit]] containing the seed(s).
6: ...(starting from the base of the flower or lowest node and working upwards) are as follows:
12: ...4-08_07a.jpg|thumb|250px|left|Flower Picture provided by [http://classroomclipart.com Classroom Clip A...
13: ..."typical" structural plan, plant species show a wide variety of modifications from this plan. These m...
14: ...ps 043a.jpg|thumb|250px|right|Flower Picture provided by [http://classroomclipart.com Classroom Clip A... - Conifer cones (8328 bytes)
3: ...onspicuous even at full maturity. The name "cone" derives from the fact that the shape in some species...
6: ...s are '''microsporophylls''' (modified leaves). Under each microsporophyll is one or several '''[[spo...
8: ...t conifer families, and is often crucial for the identification of many species of conifers, in as muc...
16: ...falling off. The cones are [[cone|conic]], [[cylinder|cylindrical]] or [[ovoid]] (egg-shaped), and sma...
22: ...ales are minute and not fleshy, but the seed coat develops a fleshy layer instead, the cone having the... - Pioneer 11 (5118 bytes)
5: ...neer 10. Three pairs of rocket [[thruster]]s provided spin-axis control (maintained at 4.8 rpm) and ch...
7: ...[[telescope]]s with overlapping fields of view to detect [[sunlight]] reflected from passing [[meteoro...
11: ...e Sun at a nearly [[asymptotic latitude]] of 17.4 degrees above the [[solar equatorial plane]] and was...
15: ...e origin of the spacecraft. It includes a drawing depicting a man, a woman, the transition of a hydrog...
21: ...anomalous, small [[Doppler]] frequency drift. The drift can be interpreted as being due to a constant acc... - World War I (62979 bytes)
2: ...had roots of power back to the days of the [[Crusade]]s, all fell during or after the war.
4: The causes of World War I were complex developments by themselves (see [[#Diplomatic and po...
6: ...s the last direct major conflict of the war. The defeat of [[Germany]] in the war and failure to reso...
8: ...n diplomatic ineptitude as well as a tremendous tide of nationalism that swept the European continent ...
10: ... on the home front due to food shortages, [[genocide]], and ground combat. - History of the United States (1980-1988) (35211 bytes)
2: ==Changing demographics and the growth of the Sun Belt==
4: ...xpense of industry and manufacturing, facilitated demographic shifts to the "frontiers" from the more ...
6: ...lifornia]] has reemerged as a bright spot for the Democratic Party in the late [[1990s]], due to a bac...
8: ...nding demand for social services, while tax bases declined. [[New York City]] barely averted bankruptc...
10: ...the GOP captured the U.S. House after 40 years of Democratic control. - New Year (5703 bytes)
4: ==Modern new year celebrations==
5: The most common modern celebrations are:
7: ...orian calendar]] used by most [[developed country|developed countries]]. (For more information, see [[...
11: ...s|firecrackers]], and in some places with a [[parade]].
14: ...[[March]] or [[April]]. The people of [[Andhra Pradesh]], [[India]] celebrate the advent of [[Hindu Ca...
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