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- Steel (28384 bytes)
2: ...[Image:Steel framework.jpg|thumb|300px|Steel framework]]
3: ...lloys with higher carbon content than this are known as [[cast iron|iron]].
5: ...ral classes of steels in which carbon is replaced with other alloying materials, and carbon, if prese...
8:
10: ...humb|left|250px|This heap of [[iron ore]] pellets will be used in steel production.]] - Burundi (13403 bytes)
1: ...western border is adjacent to [[Lake Tanganyika]] where it enjoys access to the Tanzanian ocean port ...
3: ...aims of the ruling [[Tutsi]] minority with the growing demands for political participation of the [[H...
10: ...vail, Progrč³ ([[French language|French]]: Unity, Work, Progress) |
12: national_anthem = [[Burundi bwacu]] |
13: ...]] and [[French language|French]]. [[Swahili]] is widely spoken.| - Mesolithic (2380 bytes)
14: ... conditions produced distinctive human behaviours which are preserved in the material record, such as...
16: ...g the [[Neolithic]], when extra space for farming was needed.
18: ...]]s and wooden objects such as [[canoe]]s and [[bow]]s have been found preserved at some sites.
24: *[[Howick house]] in the [[United Kingdom]] - Blast furnace (4721 bytes)
1: ... [[combustion]] material and [[ore]] are supplied with [[air]] from the bottom of the chamber such th...
4: ...dently developed there, or whether the technology was transmitted to [[Europe]] by the [[Mongol Empir...
6: ...Europe had progressed to the point that fuel-wood was becoming a [[strategic resource]], and the use ...
9: ...hter materials on top. A valve was opened to allow the slag to pour out, and once emptied, another v...
15: ...ally to produce pure iron and [[carbon dioxide]], which leaks out of the furnace at the top. - Earth (30908 bytes)
4: ...in here. It's been done to death. Find a gem with which to improve the article and you'll shine forev...
7: ...e Earth''' or '''Terra''', is the third planet outward from the [[Sun]]. It is the largest of the [[s...
14: ... sea level). Thus the Earth is an oblate spheroid within a [[tolerance (engineering)|tolerance]] of o...
17: ...inner core. The liquid outer core gives rise to a weak [[magnetosphere|magnetic field]] due to the co...
19: ... old [http://spaceflightnow.com/news/n0101/14earthwater/]. - Europe (23835 bytes)
1: ...Image:LocationEurope.png|thumb|250px|World map showing location of Europe]]
4: ...nded to the north by the [[Arctic Ocean]], to the west by the [[Atlantic Ocean]], to the south by the...
6: ...f Europe is roughly 705,500,000: about 11% of the world's population.
9: ...icture of [[Europa (mythology)|Europa]], carried away by bull-shaped [[Zeus]].]]
11: ...for mainland Greece and by [[500 BC]] its meaning was extended to lands to the north. - Bangladesh (29715 bytes)
2: ... border=1 align=right cellpadding=4 cellspacing=0 width=300 style="margin: 0 0 1em 1em; background: #...
6: {| style="background: none; width: 100%; text-align:center;"
27: | '''[[Area]]'''<br>- Total<br>- % water
49: ...'''[[National Flower]]''' || Water lily|Shapla ([[Water lily]])
65: ... long been advanced [[civilization]] in what is now Bangladesh, once the eastern part of a greater re... - Solomon Islands (9265 bytes)
1: ... Nations]]. It consists of more than 990 islands, which together cover a land mass of 28,000 square k...
2: ... border=1 align=right cellpadding=4 cellspacing=0 width=300 style="margin: 0 0 1em 1em; background: #...
8: | align="center" width="140px" | [[Image:Solomon islands flag large....
9: | align="center" width="140px" | [[Image:Solomon_Islands_coat_of_arm...
11: | align="center" width="140px" | [[Image:FIAV_56.png]] (adopted [[No... - Nepal (22444 bytes)
1: ...[[kingdom]]. It is in South Asia, sharing borders with the [[People's Republic of China]] ([[Tibet Au...
2: ... border=1 align=right cellpadding=4 cellspacing=0 width=300 style="margin: 0 0 1em 1em; background: #...
7: | align=center width=140 | [[Image:Nepal flag large.png|125px|Flag...
8: | align=center width=140 | [[Image:Nepal_COA.gif|120px|Coat of arm...
10: | align=center width=150 | ([[Flag of Nepal|In Detail]]) - History of science (41710 bytes)
2: ...] and their pre-cursors back in [[time]], all the way into human [[prehistory]].
4: ...many place ancient [[natural philosophy]] clearly within the scope of the history of science.
6: ... philosophy also enquires about other areas of knowledge, notably [[ethics]]. In practice, each of th...
11: ... scientific knowledge, and to de-emphasize the view that scientific data is self-evident, value-free,...
13: ... can be [[demarcation problem|no demarcation]] between science and any other form of investigation. - Meteorology (19082 bytes)
3: ...change in time. The majority of Earth's observed weather is located in the [[troposphere]].
10: ...omenon)|halo]] around the moon, without bothering with explanations.
12: ...ruments in [[1780]] with the hair [[hygrometer]], which measures [[humidity]].
14: ...nd was one of the first Americans to forecast the weather on a daily basis.
16: ...eld of machines with rotating parts, such as waterwheels. - Tree (23723 bytes)
2: ...g|right|thumb|250px|The [[conifer]]ous [[Coast Redwood]], the tallest tree species on earth]]
3: ..., trees are long-lived. A few species of trees grow to 100 m tall, and some can live for several [[mi...
5: ... Trees also play an important role in many of the world's [[mythology|mythologies]] (see [[Tree (myth...
9: ...] of plants. Trees thus show a wide variety of growth form, leaf type and shape, bark characteristics...
11: ...low gives examples of many well known trees and how they are typically classified. - Erosion (6998 bytes)
2: ...b|225px|Severe soil erosion in a wheat field near Washington State University, USA.]]
4: ..., [[overgrazing]] and road or trail building. Likewise, humans have sought to limit erosion by [[terr...
6: ...educing [[Soil degradation|soil fertility]] and [[water quality]].
9: ... erosion to be severe in some areas and minor elsewhere? It is a combination of many factors, includi...
11: ...s, and steep slopes to be the most erosive. Soils with a lot of [[clay]] that receive less intense pr... - Bird (20345 bytes)
2: {{Taxobox_image | image = [[Image:White_owl_illustration.jpg|200px|]]
10: <center>Many - see [[#Bird orders|section below]].</center>
13: ...her]]s, forelimbs modified as [[wing]]s, and hollow bones.
15: ...on|extinct]] in the span of human history) in the world, making them the most diverse class of terres...
17: ...ay aloft for days at a time, even sleeping on the wing. - Forest (3705 bytes)
2: ...orest.jpg|thumb|right|360px|A dense growth of softwoods (a forest) in the Sierra Nevada Range of Nort...
4: A '''forest''' is an area with a high density of [[tree|trees]] (or, historic...
6: ... [[lignin]] and other materials that decompose slowly.
8: ...anopy, which allows some sunlight to penetrate between the trees (see also: [[savanna]]).
14: * [[temperate hardwood forest]] - Maya civilization (25116 bytes)
1: ...or]]) with some 3,000 years of history. The Maya were part of the [[Mesoamerica|Mesoamerican]] [[Pre...
5: ... disagreement about the borders and difference between the early Maya and their neighboring Pre-Class...
11: ...roglyphic texts describing their [[genealogy]], [[war]] victories, and other accomplishments.
18: ...ations where artists attached their name to their work.
22: ...r religious, commercial and bureaucratic power grew into incredible cities, including Chichen Itza, T... - Macaw (5144 bytes)
1: {{Taxobox_begin | color = pink | name = Macaws}}
2: ...w Macaw|240px]] | caption = [[Blue-and-yellow Macaw]]}}
18: ... largest birds in the parrot family in length and wingspan, though the flightless [[Kakapo]] is heavi...
20: ...having 4 toes on each foot – two front and two back.
22: ...] and [[South America]]. They are locally also known as ''Guacamayos'' in [[Spanish language|Spanish]... - Monarch butterfly (5180 bytes)
15: ...s have a spot in the center of each hindwing from which pheromones are released.
19: ...uthwest of [[Great Britain]] in any year when the wind conditions are right.
21: ...narchs swarm in [[Santa Cruz, California]] during winter.]]
23: ...tasteful and poisonous to [[Blue Jay]]s and other would-be predators, and many such animals avoid con...
25: ...rth, the mature butterfly emerges after about two weeks. - Early history of Ireland (30651 bytes)
2: ...Newgrange ireland 280px.jpg|right|thumb|215px|[[Newgrange]], a famous Irish passage tomb built c3,200...
5: ...ng sheet of ice. It is highly unlikely that there were any humans in the country at this time, though...
7: ...s were to pass before the treeless [[permafrost]] was transformed into a densely forested fertile lan...
9: ...r hearths for cooking their food, and they are known to have built canoes from dug-out tree trunks.
11: ...ation of Ireland was probably never more than a few thousand. - Climate change (15859 bytes)
1: ...of climate, including precipitation and clouds as well as temperature. Climate changes can be caused ...
3: ...used change [http://www.grida.no/climate/ipcc_tar/wg1/518.htm]. Sometimes the term "anthropogenic cli...
5: ...ttribution of recent climate change]]. For global warming episodes in the geological record, see [[Pe...
8: ...'. Internal factors are those due to interactions within the earth's climate system. External factors...
12: ...glacial were probably caused by events associated with the [[Canadian Shield|Laurentide]] ice sheet a...
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