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What factors affect the rate of cooling of an animal?

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Introduction

What factors affect the rate of cooling of an animal? Planning I am going to find out whether a small volume of water cools quicker than a larger volume of water. I will put boiling water into a beaker at certain volumes. I will take the temperature of the water at intervals of 30 seconds for 10 minutes. Then I will repeat the experiments then change the volume. I will use the following volumes of water: 10ml, 20ml, 30ml, 40ml, 50ml, 60ml, 70ml, 80ml, 90ml and 100ml. I will be measuring the temperature of the water to see if it cools down faster when there is a large volume of water, rather than a larger volume of water. The equipment I will use is: * Measuring Cylinder * Thermometer * Water * Kettle * Stop clock I will only change the amount of water in the measuring cylinder. I will keep the same measuring cylinder, stop clock, thermometer. I will also begin the experiment on the same temperature each time. I think that the measuring cylinder with the least water will cool down fastest and the measuring cylinder with the most amount of water will cool down slower. ...read more.

Middle

and 10 minutes. I am going to use the same stop clock and thermometer. I will also make sure that I start the timer when the temperature is the same as the other volume readings. Obtaining Evidence First Time 100 ml 90 ml 80 ml 70 ml 60 ml 50 ml 40 ml 30 ml 20 ml 10 ml 0 76 76 76 76 76 76 76 76 76 76 30 seconds 73 72 74 75 75 75 74 74 72 62 1 minute 71 68 72 73.5 74 74 72 72 68 60 1:30 70 66 71 72.5 73 72 67 70 66 58 2:00 70 65 70 72 72 71 66 68 64 55 2:30 68 64 69 71 71 70 65 67 62 53 3:00 66 63 68 69 71 69 64 66 61 52 3:30 65 63 66.5 69 69 68 62 65 60.5 50 4:00 64 61 66 67 68.5 66 62 64 59 50 4:30 63 60 65 67 67 65 61 63 58 47 5:00 62 59 65 66 66 65 60 62 57 46 5:30 60 58 64 64 65 64.5 59 61 55 45 6:00 60 57 63 63 64 64 58 60 54 45 6:30 59 ...read more.

Conclusion

The conclusion agrees with my prediction because the measuring cylinder with the biggest volume of water had a higher temperature at the end of the experiment. Using my theory that surface area increases, so heat loss will decrease, I have proved it right as my graphs show. Evaluating Evidence I know that my experiment was a fair test because I repeated it twice and the results were all very similar there was not any that really had a major difference amongst them. My experiment turned better than I expected it to so I was really pleased with the out come. I think that the accuracy of this experiment was maintained very well and I did this by: 1) Making sure that the thermometer was always at the same degree each time we placed it into a test tube 2) Reading the measurements of the thermometer at eyelevel. 3) Taking readings more than once and calculating the average 4) And finally by using the same person reading the measurements on the thermometer and the stopwatch. The experiment can be extended by also investigating other factors that could affect heat loss, such as the environmental temperature, body covering and also behavior of the animal. Helen Williams 11Y Science Coursework ...read more.

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