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Life In the Freezer

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LIFE IN THE FREEZER :- Introduction :- Antarctica is the fifth-largest and southernmost continent. Its position at the South Pole, together with its elevation and ice-and-snow cover, generates the coldest climate on Earth. Its enormous ice sheet covers all but 2 to 3 % of Antarctica and extends over the encircling ocean. Wherever any organism lives it has to be adapted to living there. Polar regions are very cold so the animals that live there have to be tolerant of the cold and, if they are warm blooded, very well insulated. Polar bears, seals, whales and Penguins etc all have thick layers of blubber. The Penguins (like mammals) are warm blooded or homeothermic. This means that Penguins maintain a relatively high blood temperature of around 40 degrees Celsius. Only warm-blooded creatures like the Penguins can cope with the extreme cold of the Antarctic. During the winter in the South Pole, the sun never rises. During the summer, the sun never sets. There is only a trace of precipitation, and drifting is the primary factor in snow accumulation around station structures. ...read more.


Time (Seconds) Middle Edge 0 42 40 30 40 37 60 39 26 90 38 25 120 36 23 150 34 18 180 33 14 210 30 13 240 27 10 270 26 8 300 23 6.5 Third Set : Temperature ( * C) Time (Seconds) Middle Edge 0 42 39 30 40 32 60 39 29 90 37.5 28 120 34 24 150 33 20.5 180 30 17 210 29 14 240 27 10 270 27 9 300 26 7.5 Now, I am taking an average of the loss in temperature of all the three graphs. Loss in Temperature = Initial Temperature - Final Temperature Loss in Temperature of the Penguin in the Middle of a big group for all the three experiments (* C) Loss in Temperature of the Penguin in the Edge of a big group for all the three experiments (* C) 19 32 19 33.5 16 31.5 Average Loss in Temperature : Middle = 19 + 19 + 16 = 18 * C 3 Edge = 32 + 33.5 + 31.5 = 32.33 * C 3 Conclusion :- From the results of all ...read more.


Loss in Temperature = Initial Temperature - Final Temperature Loss in Temperature of the insulated Penguin for all the three experiments (* C) Loss in Temperature of the uncovered Penguin for all the three experiments (* C) 1.5 3 0 1 0 2 Average Loss in Temperature : Insulated Penguin = 1.5 + 0 + 0 = 0.5 * C 3 Uncovered Penguin = 3 + 1 + 2 = 2 * C 3 Conclusion :- From the results of all the three experiments, it can be clearly seen that the insulated penguin losses very less heat when compared to the uninsulated one. This is because due to the insulation, the temperature cools down slower. Basically the insulation means that the heat energy cannot get out as quickly. This could be by either conduction, convection or radiation. The insulation slows all of these processes. In Penguins the insulation is the skin along with a layer of fat underneath it. Therefore it keeps the penguin warmer in its cold habitat. ?? ?? ?? ?? Bargavi Rajan 10 'P' ...read more.

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