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Penguin assessment.

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BY MONA FARSIMADAN 9Y In my assessment I will be first writing about all the factors that prevent heat loss then I am going to do an experiment based on one of the factors and seeing if it actually prevents heat loss. PLAN There are various factors, which affect the rate of heat loss in penguins. These include: . Feathers: They have a thick layer of insulating feathers, which are waterproof designed to keep them warm in water. So they can keep their body temperature while in the water, this is because heat is lost more rapidly in water then in air. . Body mass (blubber): Penguins have a thick layer of blubber under their skin, which stops the cold leading to he organs. This helps them from the extreme cold. . Flippers: They hold their flippers out from their bodies and pump hot blood to them so that they can act as radiators. . Circulatory system: This allows the main organs to be warm. . Blood vessels: Penguins have specially adapted vessels in their feet to help them cope with standing on cold ice. ...read more.


1 test tube . 3 test tubes . 6 test tubes . 8 test tubes . 10 test tubes Measurements: In order to carry out this experiment I used the followings: . Stop clock, to measure the time. . Thermometer, to measure the temperature of the water in the middle test tube. . Test tube, to hold the water. . Measuring bowl was used to pour the same amount of water into the test tube. Fair test: For my fair test I had to start at 0 seconds and finish at 5:00 minutes, this is because I needed the time to be exactly right, otherwise the temperature readings would be wrong. I also needed the amount of water to be approximately 50ml. This is because the measures of the heat loss would not be accurate. In addition the same stop clock and thermometer were used for consistency. Safety: To ensure safety I wore goggles through out the experiment. In addition hot water was handled with care through out the experiment. Prediction: I predict that the more test tubes (penguins) ...read more.


were used the less heat was lost, so they kept warmer if more penguins were huddled. I found out that penguins intend to huddle each other when the temperature is low, to keep them warm, reducing heat loss. I have realised that some of the things I did may off affect my results. For example the amount of water I put in each test tube. I was using approximately 50ml. This might off affected the amount of heat, which was lost in the test tubes. To improve next time I will use exactly 50ml. For the experiment to be right we need to have a fair test, and in order to have a fair test we need some things in the experiment to be fair. For example we need the temperature in the beginning to be constant and the amount of water put in the test tubes. Also the same stop clock and thermometer. We the stop lock to begin at 0.00 and end after 5 minutes. However, in the experiment because of lack of time I was unable to carry the out all five experiments in one lesson. This may have interfered with the results. ...read more.

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