Group items tagged science - ASW 8 Science C Block

shared by majak2 on 26 Jan 16 - No Cached

Table of Contents IntroductionThe Quaternary environmentGlaciationSea-level changesPaleoclimate
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The most distinctive changes seen during the Quaternary were the advances of ice into temperate latitudes of the Northern Hemisphere.
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The glacial landscapes were dominated by ice several kilometres thick that covered all but the highest peaks in the interior.
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High ice and domes of cold high-pressure air displaced the polar jet streams, steering storm tracks south to the glacial margins and beyond. In addition, cold sinking air over the ice sheets created strong down-flowing katabatic winds, drying land near the glaciers.
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Alternative titles: Great Ice Age; Quaternary Period
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shared by zosiaa on 26 Jan 16 - No Cached

Tyrannosaurus rex arose during the Cretaceous period about 85 million years ago and thrived as a top land predator until the dinosaurs went extinct 20 million years later
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shared by Solomon Senrick on 25 Jan 16 - No Cached

India continued its slow-moving collision with Asia, which had already started the giant push-up of the Himalaya that continues today. Italy pushed into Europe, giving rise to the Alps. Spain butted France, and the Pyrenees rose.
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Elephants and apes wandered from Africa to Eurasia. Rabbits, pigs, saber-toothed cats, and rhinos went to Africa
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In the oceans, a new type of large brown algae, called kelp, latched onto rocks and corals in cool shallow waters, establishing a new habitat favored by sea otters and dugongs, a marine mammal related to the elephant. Sharks grew and dominated the seas once
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shared by jiminp on 26 Jan 16 - No Cached

The Proterozoic Eon extended from 2.5 billion to 541 million years ago and is often divided into the Paleoproterozoic (2.5 billion to 1.6 billion years ago), the Mesoproterozoic (1.6 billion to 1 billion years ago), and the Neoproterozoic (1 billion to 541 million years ago) eras.
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Megascopic eukaryotes first appeared about 2.3 billion years ago and became widespread by about 1.8 billion years ago.
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Eukaryotes employed a form of respiration and oxidative metabolism; they had a central nucleus that could split into separate sex cells, and so for the first time a mixed and variable genetic code could be passed to younger generations.
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Many mountain belts formed during the Proterozoic
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