How did Lake Victoria form?
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Lake Victoria is a Tectonic Basin, much like many of the great rift valley lakes. The basin the lake is formed through structural upwarping of the land. You can see evidence for this in the uplifting around entire basin and by the fact that it is a large but fairly shallow lake.
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4600 Formation of the approximately homogeneous solid Earth by planetesimal accretion  \n4300 Melting of the Earth due to radioactive and gravitational heating which leads to its differentiated interior structure as well as outgassing of molecules such as water, methane, ammonia, hydrogen, nitrogen, and carbon dioxide  \n4300 Atmospheric water is photodissociated by ultraviolet light to give oxygen atoms which are incorporated into an ozone layer and hydrogen molecules which escape into space  \n4000 Bombardment of the Earth by planetesimals stops  \n3800 The Earth's crust solidifies--formation of the oldest rocks found on Earth  \n3800 Condensation of atmospheric water into oceans  \n3500-2800 Prokaryotic cell organisms develop  \n3500-2800 Beginning of photosynthesis by blue-green algae which releases oxygen molecules into the atmosphere and steadily works to strengthen the ozone layer and change the Earth's chemically reducing atmosphere into a chemically oxidizing one  \n2400 Rise in the concentration of oxygen molecules stops the deposition of uraninites (since they are soluble when combined with oxygen) and starts the deposition of banded iron formations  \n2000 The Oklo natural fission reactor in Gabon goes into operation  \n1600 The last reserves of reduced iron are used up by the increasing atmospheric oxygen--last banded iron formations  \n1500 Eukaryotic cell organisms develop  \n1500-600 Rise of multicellular organisms  \n580-545 Fossils of Ediacaran organisms are made  \n545 Cambrian explosion of hard-bodied organisms  \n528-526 Fossilization of the Chengjiang site  \n517-515 Fossilization of the Burgess Shale  \n500-450 Rise of the fish--first vertebrates  \n430 Waxy coated algae begin to live on land  \n420 Millipedes have evolved--first land animals  \n375 The Appalachian mountains are formed via a plate tectonic collision between North America, Africa, and Europe  \n375 Appearance of primitive sharks  \n350-300 Rise of the amphibians  \n350 Primitive insects have evolved  \n350 Primitive ferns evolve--first plants with roots  \n300-200 Rise of the reptiles  \n300 Winged insects have evolved  \n280 Beetles and weevils have evolved  \n250 Permian period mass extinction  \n230 Roaches and termites have evolved  \n225 Modern ferns have evolved  \n225 Bees have evolved  \n200 Pangaea starts to break apart  \n200 Primitive crocodiles have evolved  \n200 Appearance of mammals  \n145 Archaeopteryx walks the Earth  \n136 Primitive kangaroos have evolved  \n100 Primitive cranes have evolved  \n90 Modern sharks have evolved  \n65 K-T Boundary--extinction of the dinosaurs and beginning of the reign of mammals  \n60 Rats, mice, and squirrels have evolved  \n60 Herons and storks have evolved  \n55 Rabbits and hares have evolved  \n50 Primitive monkeys have evolved  \n28 Koalas have evolved  \n20 Parrots and pigeons have evolved  \n20-12 The chimpanzee and hominid lines evolve  \n10-4 Ramapithecus exist  \n4 Development of hominid bipedalism  \n4-1 Australopithecus exist  \n3.5 The Australopithecus Lucy walks the Earth  \n2 Widespread use of stone tools  \n2-0.01 Most recent ice age  \n1.6-0.2 Homo erectus exist  \n1-0.5 Homo erectus tames fire  \n0.3 Geminga supernova explosion at a distance of roughly 60 pc--roughly as bright as the Moon \n0.2-0.03 Homo sapiens neanderthalensis exist  \n0.05-0 Homo sapiens sapiens exist  \n0.04-0.012 Homo sapiens sapiens enter Australia from southeastern Asia and North America from northeastern Asia  \n0.025-0.01 Most recent glaciation--an ice sheet covers much of the northern United States  \n0.02 Homo sapiens sapiens paint the Altamira Cave \n0.012 Homo sapiens sapiens have domesticated dogs in Kirkuk, Iraq  \n0.01 First permanent Homo sapiens sapiens settlements  \n0.01 Homo sapiens sapiens learn to use fire to cast copper and harden pottery  \n0.006 Writing is developed in Sumeria\n\n\nFor a Visual representation of all this go here:\nhttp://www.lpi.usra.edu/education/timeline/
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This is only a theory, no amount of evidence has proven it fact. The only way scientists verify it is through fossil records which show the existence of marine creatures and plants existing at one point in the middle of the dry land continents that we see today. Also, scientists believe that the continents were once one huge land mass that came into existence similar to the way Hawaii did (aka. with a lot of volcanic activity).
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Diamonds are formed by intense pressure on carbon deposits in the Earth's surface.  With enough pressure and time, a chunk of carbon can form a diamond.  The carbon that is in the Earth's surface can come from fossilized organic materials (ie prehistoric plants, animals, etc).
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I live on Lake Ontario\n-but-\nI got to visit Lake Victoria in Africa and it was phenom!
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When the earth was forming it was extremely hot and water existed merely as vapour, if it fell it never reached the ground being in suspension constantly. Then when the first rains fell boy did they fall, and the rain cycle began.\n\nVapour clouds came first.
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Length of Kariba Lake is 277 km.\n\nLake Kariba was formed by damming the Zambezi River. It lies on the border between Zambia and Zimbabwe, with an area of 5 364 km2, a length of 277 km and a mean depth of 29 m. Lake Kariba supports pelagic (offshore) and artisanal (inshore) fisheries. The pelagic fishery exploits the freshwater sardine (Limnothrissa miodon) known locally as kapenta. There are approximately 280 boats registered to fish in the pelagic fishery. The estimated annual catch in the inshore fishery in 2001 was 3 400 tonne. The inshore fishery contributed approximately 26% of the total catch from Lake Kariba."
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The Earth was formed around 4.57 billion (4.57×109)[1] years ago
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Hi. Start here : http://www.nationalgeographic.com/adventure/0503/excerpt3.html or here : http://news.bbc.co.uk/1/hi/world/africa/2520815.stmre :
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The nile river\nIt start from victoria and end in the Medeteranien see
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mountains form when techtonic plate hit each other, sometimes one will go over the other. they can also both go up and form a mountain. if 2 techtonic plates both dig downward then u have a valley.
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The Nile (Arabic: النيل‎, translit: an-nīl, Ancient Egyptian iteru) is a major north-flowing river in Africa, often regarded as the longest river on Earth, although some sources claim the Amazon in South America is longer. The Nile has two major tributaries, the White Nile and Blue Nile, the latter being the source of most of the Nile's water and fertile soil, but the former being the longer of the two. The White Nile rises in the Great Lakes region of central Africa, with the most distant source in southern Rwanda 2°16′55.92″S, 29°19′52.32″E, and flows north from there through Tanzania, Lake Victoria, Uganda and southern Sudan, while the Blue Nile starts at Lake Tana in Ethiopia, flowing into Sudan from the southeast. The two rivers meet near the Sudanese capital Khartoum.\n\nThe northern section of the river flows almost entirely through desert, from Sudan into Egypt, a country whose civilization has depended on the river since ancient times. Most of the population of Egypt and all of its cities, with the exception of those near the coast, lie along those parts of the Nile valley north of Aswan; and nearly all the cultural and historical sites of Ancient Egypt are found along the banks of the river.\n\nThe Nile ends in a large delta that empties into the Mediterranean Sea.The Nile (Arabic: النيل‎, translit: an-nīl, Ancient Egyptian iteru) is a major north-flowing river in Africa, often regarded as the longest river on Earth, although some sources claim the Amazon in South America is longer.[1] The Nile has two major tributaries, the White Nile and Blue Nile, the latter being the source of most of the Nile's water and fertile soil, but the former being the longer of the two. The White Nile rises in the Great Lakes region of central Africa, with the most distant source in southern Rwanda 2°16′55.92″S, 29°19′52.32″E, and flows north from there through Tanzania, Lake Victoria, Uganda and southern Sudan, while the Blue Nile starts at Lake Tana in Ethiopia, flowing into Sudan from the southeast. The two rivers meet near the Sudanese capital Khartoum.\n\nThe northern section of the river flows almost entirely through desert, from Sudan into Egypt, a country whose civilization has depended on the river since ancient times. Most of the population of Egypt and all of its cities, with the exception of those near the coast, lie along those parts of the Nile valley north of Aswan; and nearly all the cultural and historical sites of Ancient Egypt are found along the banks of the river.\n\nThe Nile ends in a large delta that empties into the Mediterranean Sea.\n\nLength 6,695 km (4,160 mi)
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. Coal is formed by heat and pressure over millions of years on vegetation deposited in ancient shallow swamps . It varies in density, porosity, hardness, and reflectivity.
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It forms due to diffraction of light by the small water droplets in fog. It's formation is similar to formation of the rainbow.
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At Divergent Margins, plates move apart and new crust and lithosphere are created. This usually occurs at a Mid-Ocean Ridge, but divergent margins can also occur on land. The Great Rift Valley of Africa is a example of a divergent margin that is splitting the African Continent into two parts. Eventually, as the rift continues to open, a new ocean basin will be formed. \nWhere Oceanic Plates move apart, Magma wells up from the Mantle and crystallizes against the trailing edges of the plates. This is how new Oceanic Lithosphere is formed. Spreading across Mid-Ocean Ridges is symmetrical, and Normal Faulting predominates. Earthquakes are weak but common. As this new, hot Lithosphere cools and moves away  from the Mid-Ocean Ridge it Isostatically adjusts and settles lower into the Mantle, increasing the depth of the sea floor. This change produces characteristic Mid-Ocean Ridge Stratigraphy. \n\nSea floor Volcanism and Hydrothermal Activity are common along Mid-Ocean Ridges. \n\nMagma cooling at Mid-Ocean Ridges continuously records variations in the polarity of the Earth's magnetic field.
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That's really a very interesting question.  The short answer is that the water evaporates rises to form a cloud and drifts somewhere else (over land, lake or ocean) to fall as precipitation (rain or snow, etc.) returning to where it began but in a different spot upon the planet.  And don't forget that some of the water is broken down in plants to form hydrocarbons (perhaps the wood of a giant sequoia tree).\n\nThe fascinating answer is that some of the precipitation falls at the poles and is locked up for centuries within mile thick glaciers.  Some of the rain drifts to the poles with salt water and is chilled so cold it sinks to the bottom then finds its way to the seven seas in very cold currents that finally wend to the tropics and rise to replace evaporated seawater.  The bottoms of the oceans even at the tropics is dark and icy cold and the entire cycle from pole to tropics and back to the atmosphere can take centuries.  Some of the precipitation can drain into underground rivers and even refill huge aquifers that underlay many contiguous states.  The water in many aquifers has been there for centuries (even since the last glaciers retreated).  Although everything remains in a vague equilibrium (perhaps interrupted by ice ages) a drop of water that evaporates may be taken out or the normal water cycle for hundreds of years at a time.
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Most people would think that experts agree on an explanation for the formation of such a grandiose site as the Grand Canyon. Surprisingly that isn't so. It is an enigma. The latest attempt to figure it out occurred as late as June last year at the Grand Canyon Symposium 2000. The Colorado River is held generally responsible for carving the Canyon. However, even before the Glen Canyon dam stemmed its awesome desert floods, the river seems hopelessly inadequate to have formed such a geological spectacle. The Colorado River flows west from the Rockies and encounters a raised plateau known as the Kaibab Upwarp. Instead of turning away from that barrier it continues through the plateau. How could it do that? The river is much younger than the Kaibab Upwarp so it could not have progressively cut the Canyon even if the land rose very slowly. In any case, most of the material that was removed from the Canyon seems to be missing, according to a report from the symposium, leaving little evidential support for the original theory that a simple progression of water erosion formed the Canyon we see today. Since the 1930's and 1940's, geologists have searched for other explanations -- that the Canyon once drained to the south-east (reversing the route of the present-day Little Colorado, then joining the Rio Grande and into the Gulf of Mexico. When problems arose with that explanation too, it was proposed that it once flowed NE along one of the present-day side tributaries such as Cataract Creek.