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Transcript of ANTARCTICA
When the giant continent of Gondwana split and Antarctica began to freeze over,the plant life did not survive. Today only 2% of Antarctica (the small area not frozen) can support plant life.
Apart from the ice, two other factors are working against the survival of vegetation in Antarctica. First is the lack of rain that falls. Just as plants find it difficult to survive in hot deserts, they cannot survive in cold deserts. Secondly during Antarctica's harsh winters there is little sunlight and in some places none. PLANTS & ANIMALS!!! Antarctica is home to many animals all though it lacks in plant life. There are estimated to be about 40 million penguins in Antarctica. There are also six types of seals crabeater, elephant, fur, leopard, ross and weddell. As well as land animals there are the whales, and there are seven types. Blue whale, humpback , fin, minke, right, sei and killer whale. Seasons,Climate & Population
Plants and Animals
Quick Fact #1 Locations of territories & bases Antarctica has many mountains ,volcanoes,valleys and glaciers.
Down the east coast of Australia,there is the Great Dividing Range,
while Antarctica has the Transantarctic Mountains.However,unlike Australia Antarctica also has several active volcanoes.The most well known active volcano is Mt Erebus.
Antarctica is divided into east and west Antarctica by the Transantarctic Mountains,which cross the entire continent.The rock formation of these mountains is similar to that of Tasmania's Mt Wellington.The eastern part of Antarctica is known as Greater Antarctica, and the western part of Antarctica is known as Lesser Antarctica.
Studies of rock found in Greater Antarctica date the region back to more than 570 million years.The thickest part in Antarctica ice cap is located on Greater Antarctica.There, the ice is estimated to be about 5 kilometers thick. In 1774,four years after charting the east coast of Australia and claiming it for Britain,Captain James Cook sailed as far as he could to find the "Great Southern Land".However,he failed because he could not move his ship through giant ice bergs.Cook then became convinced that Antarctica did not exist.
However in the 1800s,Cook was proved wrong because the Antarctic land was sighted for the first time by various explorers.During the 1820s and 1830s,many explorers wanted to go to Antarctica because they thought fame and fortune awaited them.
Then in 1921- 1922 Shackleton traveled to Antarctica because he had been sent to explore the Beaufort sea.He had difficulties with the engine and finance.Since then scientists and explorers have been trying to uncover the mysteries of Antarctica. THANKS FOR WATCHIN' BIBLIOGRAPHY Books:
Nicolas Brasch, 2001, Antarctica
www.antarctica.com EXPLORATION Winter in Antarctica lasts for six months,from the middle of march to the middle of September .Areas near the center of Antarctica receive no sunlight for the entire winter.The amount of sunlight increases when you get closer to coastal regions.The average winter temperature is -70 degrees Celsius.The worlds lowest recorded temperature is -89 degrees Celsius. QUICK FACT #2 The Ancient Greeks suspected Antarctica existed in 450 BC..Some people drew maps including "the unknown frozen land".The greeks also named Antarctica "Antarktikos" in greek that meant opposite the bear(a constellation).Do you think it's possible that an explorer came to Antarctica 1,000 years before we thought Quick Fact#1 Phytoplankton thrives in the summer months because there is constant sunlight. However over time the amount of ultraviolet radiation reaching the continent of Antarctica has increased. To protect itself from the ultra violent rays a species of Phytoplankton called Phaeocystis has began to produce its own sun screen, to ensure it's long term survival! General geography & landforms
Quick Fact #2
Bibliography Macquarie Island is in the subantarctic.
The division also manages other significant areas in the Australian Antarctic territory,such as Heard, McDonald Island and Commonwealth Bay and keeps a weather station at Dome A, the highest point in Antarctica. research stations. Mawson, Davis and Casey are on the Antarctic continent, and Table of Contents: By:Kirsty Waugh Current Concerns There are several concerns about Antarctica,for example now that we are polluting green house gasses into the air the sun is heating up the ozone layer which results in the glaciers melting and the ice cracking.There is currently a big crack forming and the scientists predict it will split in about 50 years.And cause major problems like flooding happening on all the coasts around the world due to a rise in sea level.
And the increasingly warm temperatures will also afect the animals that live on Antarctica it will stop the food chain so they will either starve to death or temperatures will be too hot and they will all become endangered.