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

Design an investigation into size and the rate of heat loss.

Extracts from this document...


Design an investigation into size and the rate of heat loss. Research question: how does the rate surface are to volume ratio of a potato affect the rate of heat loss? Hypothesis: I believe that the biggest potato will have the highest rate of heat loss due to its large surface area to volume ratio. Independent variable: the size of the potato will be manipulated. Dependent variable: the rate of the reaction will be measured. Controlled variables The same potato was used. This ensured that the experiment was fair as it meant that every potato piece was the same despite the size. The water used in each of the three experiments was all the same temperature of 100�C. This increased accuracy as every potato piece was taking in heat at the same temperature. The same volume of water was used for each experiment to increase fairness. Each potato piece stayed in water for 5 minutes so as to take in heat. ...read more.


The volume and surface area were calculated through the following equations: Volume = length * width * height Surface area = area of one surface * number of surfaces. These values were shown in a table where the ratio of the surface area to the volume was found. Volume cm3 Surface area cm2 Ratio Potato 1 - 4*4*4 64 96 1 : 3 Potato 2 - 3*3*3 27 54 2 : 1 Potato 3 - 2*2*2 8 24 3 : 1 The results attained from the experiment and tabulated in the table were used to create a graph to show the relationship between the heats lost in each potato after five minutes. The graph shows that the smallest potato gained the most heat but also underwent the most heat loss in the five minutes. The first and second potatoes had similar starting and ending temperatures and thus it is difficult to distinguish between the two in the plotted graph. ...read more.


Heat was lost from the water as it was poured from the kettle to the measuring cylinder, then to the beaker. This would affect the initial temperature of the water and would mean that every potato had different starting temperatures. This would influence the amount of heat absorbed. The potatoes lost heat when removed from the beaker. This would affect the initial temperature and the rate of heat loss. The beakers were not insulated and thus lead to heat being lost through them. The apparatus contained many uncertainties. Improvements The experiment should be done in a room with a comfortable temperature and no draughts that would affect the rate of heat loss. To decrease the amount of heat lost before the start of the experiment, water should be poured directly into the beaker. The initial starting temperature should be the same for each experiment. The beakers should be lagged so as to insulate them and prevent heat lost through them. The school should purchase more accurate apparatus. ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology 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 International Baccalaureate Biology essays

  1. Isotonic Point of Potatoes

    Apart from this, the 0.1 M had the highest difference in mass and the second highest in change in length, where the highest was the 0.15M solution, which was a experimental anomaly. The general pattern of data suggested that as the concentration of the solution increased till 0.25M, the change

  2. Ecology Design IA

    Recording of data 1. At sunrise, the number of gastropod organisms that were adhered to the rocky shore were counted and recorded 2. Step 1 was repeated at: (The clock was used to determine the times to count)

  1. Modelling Surface Area to Volume Ratio in Cells with Agar Cubes

    because of their different sizes and surface areas. As the cubes got bigger it took longer for the hydrochloric acid to diffuse completely through the cube. It took longer to reach the centre of the cube even though the rate of diffusion was the same for all the cubes.

  2. Ecology Open Investigation Does the geographic location affect the biotic and abiotic ...

    The standard deviation on the graphs presented in this investigation show that there is a wide range of values in relation to the mean value. In table 1.0, the error bar (standard deviation) shows that the range of data is vast in relation to the mean of the data.

  1. Osmosis Experiment. This experiment is to consider how salinity influences osmosis in potato cells.

    the test tube, it stated that: 'at 0%, the weight of the potato strip increased by 4.66 grams and at 10% the weight decreased by 22.6 grams.' Although the weight and size of the potato strip is unknown, if a small piece of potato was to lose 22.6 grams, there will be no potato left!

  2. Lung Capacity Fitness Level

    Materials - Participants who matches the requirements - 25 � Fitness level survey * Refer to Appendix - Fully charged Pasco Xplorer GLX - Pasco Xplorer Spirometer - 25 � Sterilized Disposable mouth pieces - 1 � Stopwatch - 2 � Pen - Results table to record data - Pair

  1. Experimental Design Notes

    distribution o Flat bell curve: data is spread out widely from the mean o Tall and narrow bell curve: data is close to the mean o SD tells how tightly data points are clustered around the mean o Data close together: small SD o Data far apart: Larger SD o

  2. An investigation on the changes in tidal volume and vital capacity of lungs before ...

    Tidal volume cm3 (100) Vital capacity cm3 (100) Mean 2270 4000 Standard deviation 790.28 1310.64 By using bar graphs it is possible to compare the values of table 1 and table 3 to see the effect of short-term exercise on tidal volume and vital capacity of the lungs. Graph 1.

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