• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

An experiment to investigate the effect of increasing the volume of sweat on heat loss.

Extracts from this document...

Introduction

An experiment to investigate the effect of increasing the volume of sweat on heat loss. Kieran Williams Partner: Matthew Wright Introduction We are trying to find out how the volume of sweat affects the rate of heat loss on humans. To do this, we are going to use boiling tubes containing water to represent our bodies and body temperature. We are going to wrap kitchen towel around the body to act as skin, and water dripped on the kitchen towel to represent sweat. We are going to vary the amount of 'sweat' present on different tubes to understand the effect on heat loss. There are a number of factors that will determine the rate of heat loss. The amount of sweat, which we have chosen to look at, will be an important factor, as heat is lost through evaporation. The more sweat there is on the skin, the more heat energy there is in the sweat, and so more can be lost by evaporation, thus cooling you down quicker. Secondly, it is possible that the temperature of the sweat itself could have an affect. The warmer the sweat, the less heat energy needed from the body for evaporation to take place. ...read more.

Middle

Method Firstly, we will take the 10 boiling tubes and wrap one sheet of kitchen towel around each. We will make sure the kitchen towel covers the whole of the tube, and we will use a rubber band to secure it. We will then place one of those boiling tubes into a wooden test tube rack. This will be our control test tube. We will then clamp 4 of the remaining boiling tubes to a clamp stand, each facing north, south, east and west - so that no drips fall onto any tubes, which could affect our results. We will then boil the kettle, and fill one beaker with water with a temperature of 25°C while we wait for it to boil. When it has boiled, we will pour it into another beaker, without recording the temperature. We will then take 5 small funnels, and push a hole through the kitchen towel, covering the top of the 5 test tubes. We will then use the syringe to measure 30cm³ of hot water into each tube, and we will then place a thermometer in each one. We will then measure 2cm³, 4cm³, 6cm³ and 8cm³ of water using the other 20cm³ syringe, and very carefully squirt the water around the top of the 4 boiling tubes on the clamp stand. ...read more.

Conclusion

We then adjusted our results to get them all to start at 60°C. For example, the boiling tube with 8cm³ of water in started at 58°C, so we added 2 to all of the results for that boiling tube. However, this could be a problem, as when the temperature is higher, it will tend to lose heat quicker, making our results inaccurate. We can see on the graph that at 4 minutes, there is a slight rise in the temperature of all of the boiling tubes. This was probably because we only got one set of results for 4 minutes. On the first attempt, we missed the time as we were finding it difficult to keep up. So on the graph, the results plotted for 4 minutes are just the results of the second attempt. During the experiment, we noticed that the 'sweat' occasionally dripped off of each boiling tube. This is obviously a small problem, as it affects the amount of sweat actually present on the 'skin'. For example, the boiling tube with 8cm³ of sweat could end up only having 6cm³. To improve this, we could have measured the sweat that had fallen into the beakers we had placed under the boiling tubes. Then we could have worked out exactly how much sweat had been on the boiling tube throughout the experiment, ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Green Plants as Organisms essays

  1. Marked by a teacher

    Investigate the effect of huddling on heat loss.

    5 star(s)

    We measured the initial starting temperature, and took measurements every minute for 6 minutes. The thermometer was held so that it was not touching the bottom of the test tube, to avoid measuring the temperature of the test tube rather than the water.

  2. Marked by a teacher

    To measure heat loss in two test tubes which represent bodies, one which sweats ...

    3 star(s)

    Temp. in dry Test tube (OC) Temp. in wet test tube (0C) 0 72 65 1 71 63 2 70 57 3 69 52 4 67 50 5 66 47 6 65 44 7 64 42 8 63 40 9 62 39 10 61 37 11 60 36 12 59 35 13 58 34 14 57 33

  1. An investigation to investigate the effect of the diameter on the cooling rate of ...

    We used 5 different beakers: 1- Diameter of beaker 7.5cm 2- Diameter of beaker 10cm 3- Diameter of beaker 11cm 4- Diameter of beaker 14cm 5- Diameter of beaker 16cm Fair test We made this experiment a fair test by: * Keeping the volume of water the same by using measuring cylinders.

  2. I am investigating the rate at which heat energy is lost and heat transfer ...

    I will also have to ensure that it is safe. SAFETY Safety precautions are needed because I am dealing with hot water, which can scald. To ensure that safety is maintained whilst performing this experiment, safety measures have to be emplaced to reduce the risk of harm and dangers when carrying it out.

  1. How the increase in clothes on a body prevents heat loss.

    with 10cm3 of water of the mixture * Place the test tube in the container and begin stop watch * Every 30 seconds prompt, check the temperature in the body and record the reading * In between each 30 seconds, check the container's water to verify that it has the same temperature as when the experiment started (5 C)

  2. My investigation is to find out the rate of which heat transfer happens. Heat ...

    76 75 74 74 73 7oC 1.4 oC Polystyrene 80 oC 74 73 71 70 69 11 oC 2.2 oC Metal 80 oC 78 78 77 76 74 6 oC 1.2 oC Using coffee as liquid and material of container as variable: Material of Container O min 1 2 3

  1. An Investigation into Water Loss from Plants.

    that there will be more transpiration therefore loss of water from the abaxil surface of the leaf than from the adaxil. This is due to the larger number of stomata on the bottom of the leaf therefore a larger surface area of cells is in contact with the outside air and so more water can escape.

  2. Investigating factors which affect heat loss from a beaker of hot water.

    When a material is heated the particles nearest to the heat gain kinetic energy. They then start to vibrate faster due to this energy and as they do they touch other particles and transfer the kinetic energy to them. This process is repeated and the energy is transferred through out the object from hot regions to cooler regions.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work