How feathers effect heat loss in penguins Essay
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Describe the overall pattern of your results. Identify any anomalies in your results. When I am looking at the rate of heat loss for the experiments I have noticed that when we look from 2g to 4g the rate of heat loss goes up. At 2g the rate of heat loss is 1 C per minute while when at 4g the rate of heat loss is 1. 2 C per minute. After this the rate of heat loss in 6g is less than the rate of heat loss in 8g this reflects my prediction.
In the all or nothing experiment I can see that the experiment with no feathers the rate of heat loss is far greater than the bag with feathers in it.
Another pattern that sometimes is reflected in my results is that as I double the amount of feathers it will halve the amount of heat loss. Make a conclusion on the evidence you observed and collected. Do your results support your conclusion? Explain your results in terms of science you have learnt, and comment on possible reasons behind irregular results. From looking what is written in my prediction I would say that my results roughly reflect that my prediction was right.
The reasons for why as I increase the feathers the rate of heat loss decreases is that as you increase the feathers you are increasing the amount of trapped air between the feather strands and air is a very good insulator so the heat will be insulated within the feathers. The irregular results was in the 4g of feathers this is because it has a greater heat loss than 2g I would say the reasons for this could be a change in the environment this could make the temperature of the test tube go up or down or it could be due to the different types of feathers.
In my prediction I said that if I double the amount of feathers the rate of heat loss is halved. I can prove this is right when I look at my results this is what I discovered at 2g of feathers for the first minute the heat loss was 3. 5C and when looking at 4g of feathers the heat loss after 1 minute is 1. 5 C this basically proves this part of the prediction to be right. When looking at the all or nothing experiment I predicted that the bag with no feathers would have a greater rate of heat loss and I was proven right by the results.
This is because the bag with feathers will have more trapped air within it because of the way feathers trap air and feathers and air is a very good insulator. . State whether the procedure was fair in all aspects or were some variables difficult to This experiment cannot be a fully fair test due to aspects that are uncontrollable what I am talking about is the environment you cannot control the environment temperatures, if it goes up or down it can make the temperature of the test tube go up or down.
The plastic bag around the test tube will provide a source of insulation because it is able to trap air. Also the top and the bottom of the tube are not covered so heat may be lost in these places. The way of keeping this experiment safe is by using tongs to handle the hot test tubes and clamp the test tube firmly to the clamp stand to stop it from falling and braking. HOW ACCURATE ARE YOUR RESULTS AND DID YOU GET ANOMALOUS RESULTS. State any limitations or problems with the experimental procedure. State whether you got any anomalous results and why you think you got them.
Can we still accept the evidence? Is the evidence sufficient to support a firm conclusion? The irregular results are at the 4g readings. The rate of heat loss for 4g is greater than the rate of heat loss in 2g. This could be due to a change in the environment or because of different types of feathers. Some feathers may be able to trap more air than other; this may explain why the rate of heat loss is greater in 2g than 4g of feathers. The thermometer may have been moved into a different part of the test tube when reading the temperature causing the temperature to go up.
We can still accept this evidence because they all follow the same basic pattern. HOW COULD THE EXPERIMENT BE MADE MORE ACCURATE? Give full details of changes you could make to the method to make it more accurate. State any further work that could be carried out to investigate the problem further. To make it more accurate you would have to take the temperature in the same place in the test tube. The way to do this is to have an extra clamp to hold the thermometer in the same place so it does not touch the glass because this can affect the temperature.
There is heat loss in the top and bottom of the test tube, a way you can stop this by if you put the test tube in a pouch to cover the bottom. A rubber bung can stop the heat loss in the top with a hole in to put the thermometer in. Another way to get the readings more accurate is to repeat the experiment again this enables you to get a more accurate average. Show preview only The above preview is unformatted text This student written piece of work is one of many that can be found in our GCSE Patterns of Behaviour section.