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• Level: GCSE
• Subject: Maths
• Word count: 1639

# Investigating heat loss in different sized animals.

Extracts from this document...

Introduction

Nicola Murr

## Investigating heat loss in different sized animals

All living things lose heat energy through the process of respiration. If an animal has a large surface area to volume ratio then it will lose the most heat over a set amount of time.

Surface area: Volume ratio = Surface area

Volume ratio

## Pre-test

 Time 100cm 3 250cm3 (Minutes) Temperature °C 0 80 80 1 72 78 2 70 75 3 68 73 4 66 72 5 64 70 6 63 68 7 61 67 8 60 66 9 59 65 10 58 64 11 56 62 12 55 61 13 54 61 14 53 60 15 52 59

Middle

Surface area = 54cm2

Volume = 27cm3

SA: VR = 54/27 = 2

## Plan

I am going to collect five different sized beakers – 100cm3, 250cm3, 500cm3, 1000cm3 & 2000cm3 each beaker representing different sized animals.

Next I am going to calculate the surface area and volume for each beaker in order to do the equation surface area: volume ratio.

I am going to get my equipment out. I will fill the kettle with water and boil the water, I will pour the water into the beakers and each person will monitor their beaker.

Conclusion

3 beaker and the 500cm3 beaker that were the same. However the results were averages and not the original, so the original results from the 2 experiments could have been different. The odd result could have occurred because the thermometer could have been read 1 degree above or below the actual temperature, which could have made all the difference to the overall average.

If I did this experiment again I would do things slightly different. I would do 3 experiments then calculate an average from the 3 experiments. 3 experiments for each beaker would be more accurate because you have 3 lots of results and it would be easier to identify if a particular experiment results were incorrect. I would also use a electronic thermometer attached to a data logging piece of software which would automatically record the temperature every 10 seconds, but would highlight the results for each minute. Using software that would automatically record the temperature every 10 seconds would reduce the risk of human error and inaccuracy it would also provide a clearer picture of the temperature during the minutes. I would have a larger amount of data to work with and to compare.

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