• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5
6. 6
6

# 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 30cm� of hot water into each tube, and we will then place a thermometer in each one. We will then measure 2cm�, 4cm�, 6cm� and 8cm� of water using the other 20cm� 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 8cm� 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 8cm� of sweat could end up only having 6cm�. 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

# Related GCSE Green Plants as Organisms essays

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

3 star(s)

This was because the wet paper towelling around one of the boiling tubes had already cooled the boiling tube so when I pored the water in it cooled very rapidly. Results: Time (mins) Temp. in dry Test tube (OC) Temp.

1. ## An investigation into the effect of a germination inhibitor on the germination of seeds.

3 star(s)

of oxygen available are also key factors that germination The amount of water each Petri dish received could have been a limitation on the growth of the seeds, as perhaps it was not a sufficient amount for all the seeds to .

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

Heat loss Average heat loss per min Black 80 oC 72 70 67 65 64 16 oC 2.67 oC White 80 oC 70 67 66 62 61 19oC 3.17oC Silver 80 oC 74 72 70 67 66 14 oC 2.33 oC Brown 80 oC 72 71 69 64 62 18oC

1. ## An Investigation into Water Loss from Plants.

They must be scientific so that they are accurate enough to pick up even the slightest difference in mass due to water loss so that the percentage of water lost can be found. The scientific scales can measure to 0.01g, which will make readings very accurate.

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

I believe that conduction will be second most deadly to heat loss, as heat will escape through the sides of the beaker and then escape out of the gaps of the large beaker or again through the sides. Radiation will be the least effective to heat loss, as foil will be wrapped around the beaker.

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

The heat can only be conducted away through direct contact, and this area of the beaker is small. Also the area that heat loss could occur through convection and radiation is small. The surface like the surface for conduction for evaporation is also reduced.

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

The difference in the number of layers will determine how long it will take for the water to escape and how much water escapes in the first place. The more layers the harder it will be for the water to rise therefore the harder it will be for heat to get lost.

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