To investigate the relationship between surface area : volume ratio and heat loss.
INTRODUCTION:
The aim of this experiment is to investigate and find the relationship between heat loss (of water) and surface area to volume ratio of animals. To investigate this, we are going to use three flasks of different volume (as the equivalent the animals) and thus different surface areas filled with water.
BACKGROUND:
Surface Area : Volume Ratios
We will be using the following formula for calculating SA:Vol ratios:
SA : Vol
Vol : Vol
100ml flask = 115 : 100 = 1.15 : 1
100 : 100
250ml flask = 230 : 250 = 0.92 : 1
250 : 250
500ml flask = 330 : 500 = 0.66:1
500 : 500
The factors effecting heat loss:
1.Energy Levels
2.Climate / air
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The second and third experiment was also accurate, however the line of best fit does not go through all the points, in the evaluation section I can explain why this could be.
On the graphs I have plotted the basic formula of a linear line of y = mx + c. As we can see the gradient for the 100ml flask at 0.97 was fractionally (0.01 out) more than double that of the 500ml flask at 0.48 which proves to us the prediction was correct. So as a statement we can say: Heat loss occurs at twice the speed for the 100ml flask than the 500ml flask due to the fact that the gradient of the line of best fit for the 100ml flask is double that of the 500ml flask. Also we can see that the 250ml flask lost it 's waters heat at somewhere between that of the 100ml and 500ml flask, proving my prediction correct.
From the results I can say that, SA to volume ratio does affect the rate of heat loss.
Evaluation of Results:
I thought that most of my results were very accurate. However there were a number of points out of place that I could improve on. On the '250ml experiment ' the reading between six and eight minutes appeared to be incorrect compared with the average heat loss in the same experiment. This could have been
When comparing two organisms of similar shape, which size organism (large or small) will retain more heat in a cold environment? Hint: Where is heat typically lost?
The dependent variable in the experiment was the temperature and energy absorbed by the water.
We can assume that the specific heat capacity of water is 4.18 J / (g × °C) and the density of water is 1.00 g/mL.
The temperature was collected every 15 seconds until the water boiled and temperature stabilized. All the data collected is listed in table 1. The heat for each experiment can be calculated with Equation 1, then Equation 2 can be used to find the
Questions to answer in your lab report. NOTE: some questions pertain to the week 1 exercise, some to week 2, and others to both. How is the amount of temperature variation related to the volume of the water body? How might you measure the speed of temperature change? How would you expect the speed of change to vary with habitat volume? Are water temperatures different than air temperatures? How are they different? Are there any cyclical patterns in the temperature-logged data (“time series”) from Angel? If so, what do you think caused these repeating patterns? Based on the results of this exercise, how might you
Abstract: This experiment introduced the student to lab techniques and measurements. It started with measuring length. An example of this would be the length of a nickel, which is 2cm. The next part of the experiment was measuring temperature. I found that water boils around 95ºC at 6600ft. Ice also has a significant effect on the temperature of water from the tap. Ice dropped the temperature about 15ºC. Volumetric measurements were the basis of the 3rd part of the experiment. It was displayed during this experiment that a pipet holds about 4mL and that there are approximately 27 drops/mL from a short stem pipet. Part 4 introduced the student to measuring
To improve the experiment, the methodology could be improved by having an efficient calorimeter to retain as much heat as possible, rather than just a tin can. Additionally, more trials for each of the experiments could be conducted to ensure correct and precise data is collected to determine more accurate conclusions.
The percent uncertainty for beakers was not calculated. The beakers were only used for storing the solutions. Therefore, the accuracy of the beakers did not affect the outcome of the
We carried out two experiments to prove our claim. One of the experiments we conducted was the temperature experiment, in which our independent variable was temperature. First, we measured 100 milliliters in two beakers of the same size. We put the first beaker on a hot plate with the setting on 2 for 22 minutes.
The amount of tablets did effect the temperature of the water. Our findings made our hypothesis incorrect. The temperature of the water did increase as the number of the tablets increased also. In this experiment, the finding were quite surprising, simply because I thought that the temperature of the water will decrease as the amount of the number of tablets increased. In the real world I feel like this information would be beneficial, because it shows the reaction of an acid plus a base mixed with water.
2. Both the measurements of temperature and volume limit the precision of the data because for temperature, we could only round to the nearest tenth, which limits the amount of sig figs. In addition, because the total volume was only 50mL, there could have been another volume that would have exceeded the optimal ratio of this experiment.
Trial one went with my data successfully, with five different temperatures of hydrogen peroxide. The starting temperature was near freezing point at one degree Celsius, then to eleven, twenty, thirty, and ending at forty.
It is more accurate to use the point of intersection of the two lines to find the mole ratio rather than the ratio associated with the greatest temperature change. This is because there could have been a greater temperature change due to other factors other than the volume of the two solutions. Also because the point of intersection has the volume the most proportional creating a more accurate equation to be solved in order to find the mole ratio.
In conclusion, my graph shows how the average rate of movement of the porcellio scaber moved slower at lower temperatures (at 5°C, the average rate of movement was 0.2cm/second) and increased movement as the temperature got higher (at 25°C, the average rate of movement was 0.5cm/second). My hypothesis was partially correct as the porcellio scabers did move slower at lower temperatures and moved faster as the temperature increased. But, the porcellio scabers did not move slower at their optimum range of 15°C. This may have been because of the temperature in the classroom at the time when I was doing my experiments. For example, when doing my experiment at 15°C, the temperature in the classroom was 24°C. This factor may have affected my results as the temperature in the room has affected the temperature being tested on the porcellio scaber.
The calculations we did were to verify that multiple scenarios were possible. They relate because we were given the dimensions of the cooler and we calculations how many kg there can be before the cooler sinks another centimeter