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Use simple laboratory equipment to model a person so that a report can be produced on how effective each of the four pieces of advice given is at reducing the rate of heat loss from a body.

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Introduction

Hypothermia Investigation Task: Use simple laboratory equipment to model a person so that a report can be produced on how effective each of the four pieces of advice given is at reducing the rate of heat loss from a body. What is Hypothermia? Hypothermia is a condition in which body temperature falls drastically as a result of exposure to cold. It may occur, for example, in hikers caught in a sudden cold front without sufficient clothing. The elderly can die from hypothermia at temperatures that would not harm younger persons. The condition involves the shutting off of blood flow to the body's surface. First aid may involve wrapping the victim in blankets (along with the rescuer, if necessary). Hypothermia can be identified by the following symptoms * The body temp falls to 32.2oC or less * A slow pulse or slower breathing * Decrease in concentration e.g. slurred speech staggering decrease in mental skills and lack of response. * No shivering at low temperatures Treatment at a hospital involves slowly raising the body temperature by various means. Advice given to walkers to try and stop the causes of Hypothermia from occurring is: 1. Always wear a hat. 2. Wear many layers of clothes. 3. ...read more.

Middle

This was to check which material out of a selection we were going to use to represent clothes for the proper experiment. The three materials that were tested to try and produce the best results for insulation were: Corrugated brown card, Bubble wrap and green school paper towels. 100mls of hot water were poured into three beakers and left for ten minutes. The temperature of the water was taken at the start and also at the end and compared with the other materials. The results were as follows: material Temperature at start (o/c) Temperature at end (o/c) Corrugated card 85 61 Paper towel 87 64 Bubble wrap 87 62 To make this a fair test the same amount of water was used, the beakers were only wrapped with one layer of the material and the temperatures for the beakers were all taken at the same time with digital clocks. As the results show paper towel was the best insulator so this meant that this was going to be used in the investigation to represent clothing. To represent a hat in the experiments polystyrene and corrugated card were cut out into the shape of the top of the beaker. A hole was placed in with a pencil to place through the thermomiter whilst recording the temperatures, this was then coated in tin-foil to help keep in infrared radiation heat inside. ...read more.

Conclusion

This proves that sheltering from the wind is the main way of stopping the symptoms of hypothermia from setting in. The sources of error As these experiments were only carried out once to fit in with the amount of work in the space of time there could have been a number of sources of error to cause anomolys these are: * The difference in room temperature in the two rooms used. * The amount of tape on the beakers, as this was not measured * The time taken to get the water from the kettle, let the thermometer reach the right height and then record and start the clock. * The amount of water may have always not have been the same e.g. just less/more than the required 100 mls. * The temperature may have not been taken exactaly on one minute from the previous time. * The temperature on the thermometer may have not been exactly at a certain degree and may have been in between two and rounded. * The paper towels when wrapped around the beaker may have been too slack or taught. * The paper towels may have covered the bottom of the beaker in some of the experiments. * The hat might have not been placed on top of the beaker properly leaving room for heat to be carried away from the beaker. ?? ?? ?? ?? Joseph Colligan ...read more.

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