# Polar Bear Experiment

olar Bear Experiment Aim === I am going to investigate how the size of a Polar Bear affects its loss of heat. I will be doing this by using beakers with hot water to represent the Polar Bears. ================= Variables ===== There are many factors that determine how quickly or slowly heat is lost. The factors are as follows: amount of water, shape, temperature and surface area to volume ratio, insulation and types of Beaker. I am going to investigate how variations in surface area: volume ratios in beakers lead to variations in heat loss. In order to make a fair test I will need to keep all other variables the same, these variables are amount of water, shape, temperature, insulation and type of beaker. The amount of water will have to be regulated because if I kept the amount of water the same there would not be a variation in mass and so the experiment would not give as clear results so I will be filling the beakers to half their full capacity. Prediction == I predict that in the smallest beaker the heat-loss will be the greatest and in the largest beaker the heat-loss will be the smallest. This is because with the small beaker there are a lot of spaces for the heat to escape from and there is little mass in the middle and so heat is lost quickly. The large beakers have a surface area larger than the small beakers but have a smaller surface area: Mass ratio because they have a very big mass. This means although heat escapes quickly it can not cool the centre of the water as quickly as with the small beaker because it has a larger Surface Area: Mass ratio.