a lot of artic animals will be extinct
No. If all the ice on Antarctica melts, it will raise sea levels round the world by 60 metres (200 feet).
Most of the ice on Antarctica is land ice, so when it melts it raises sea levels, globally, which means all around the world.
If Antarctica melts, it could contribute to sea level rise globally, leading to increased flooding in coastal areas, including parts of England. The melting ice could also disrupt ocean currents, potentially impacting the climate in England and beyond.
Just in Antarctica, because the density of the ice is 3.2.
In deserts, the snow melts at summer time, however in Antarctica, the snow never melts. (From Starprof): No, that isn't exactly true. I observed melting snow at McMurdo Station in late summer. The air temperature was about 40 F. Also, some snow disappears due to sublimation. If the term desert means a place of very little precipitation, then Antarctica qualifies as a desert.
There is nothing in the world like Antarctica. Greenland may be closest, given its glacier cover. However, Antarctica is 30 degrees F. colder than the polar climate in the Northern Hemisphere.
Tornadoes can happen anywhere in the world except cold areas like Antarctica and the north pole. Tornadoes are mostly common in United States.
Almost all of Antarctica is covered by ice, so it's greatly affected by a global rise in temperatures. When this ice melts and glaciers collapse, sea levels all over the world rise.
There are several words in your question that can be confusing. First, Antarctica is a continent, not a hemisphere. (Hemispheres cover halves of the planet.) The continent of Antarctica does contain about 90% of the earth's store of ice.
For a list of the major deserts of the world and the countries in which they occur, click on this link.
Antarctica is south of the rest of the world.
There is no Antarctica world