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

Heat Loss

Extracts from this document...


Biology Coursework Investigation - Heat Loss Aim To investigate how variations in surface area and volume ratios in organisms lead to variations in heat loss and retention. Introduction Large animals have the ability to retain heat more easily than smaller animals because they have a larger surface area to volume ratio. This is the what I am trying to prove in the experiment. There are examples of this in nature. In winter the robin fluffs its wings up in order to retain more heat. When it does this, it forms a more spherical shape and this also gives better heat retention. But as I am unable to use live animals in the experiment I am using beakers full of hot water. The reason that an animal with a lower surface area to volume ratio retains heat more efficiently is because there is a greater volume to keep the heat and a smaller surface area that is open to outside elements. ...read more.


Predictions 330/500 = 0.66:1 115/100 = 1.15:1 1.15/0.66 = 1.742 I predict that the smaller beaker will lose heat around one and a half times faster than the larger beaker. Controlling the Variables To ensure that this was a fair test several measures were taken in the experiment. Two runs were done at the same time and an average temperature was taken. The heights above the desk were also the same for all flasks and they were done at the same time to make sure they stayed in as similar as possible a room temperature. Results Tables 500ml Non-Insulated Beaker 100ml Non-Insulated Beaker Time Temp Time Temp 1 67.5 1 65.75 2 67 2 64.75 3 66.5 3 63.75 4 66 4 62.75 5 65.5 5 61.75 6 65 6 60.75 7 64.75 7 59.75 8 64.5 8 59 9 64 9 58.25 10 63.5 10 ...read more.


0.76/0.43 = 1.767 The predicted difference between the two was 1.742, so from that I can conclude that the experiment was fairly precise. In the insulated results, I can, by again taking the heat losses per minute, see what effect insulating material has on the beakers. 0.66/0.3 = 2.2 The insulation seems to make the larger flask even more heat retentive than before, but the 100ml flask is still not very heat retentive. It also gained less retention capabilities than the larger flask did. Conclusions I can conclude from these results that the original predictions were fairly accurate. So this means that it is true that the lower the surface area to volume ratio the better the heat retention. Evaluation There are a number of factors that could be improved the next time I do this experiment. I could have been more precise in my measurements and timekeeping. Also, I could have made sure that the insulating material was the same thickness on both beakers. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms 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 GCSE Green Plants as Organisms essays

  1. Marked by a teacher

    An investigation into the relationship between heat loss and surface area to volume ratio

    3 star(s)

    a beaker and change the volume of water I used considerably. Planning After taking into consideration what happened in my preliminary work I decided to fill: A 300cm3 beaker with 300cm3 of water. A 125cm3 beaker with 125cm2 of water.

  2. An Investigation into Water Loss from Plants.

    is why the 2.276% lost from the top was so similar in value to the 2.144% lost when no surfaces were exposed. The bottoms of all leaves had quite a high number of stomata therefore more chance for transpiration so a greater percentage of the mass was lost.

  1. Investigating Heat Loss in Model Animals

    These were often due to a lack of either equipment or accuracy. 1. I discovered that it was very difficult to obtain any water that was actually at 100 �C, and then to fill all the test tubes separately without there being a large drop in water temperature whilst waiting for water to re-boil.

  2. Discover which insulating material is the most efficient for keeping warm.

    * Secondly boil some water in a kettle and pour 200ml of it into the beaker. Insert the thermometer and wait until it is at 55�C. * Place a cardboard lid to help reduce convection, onto the beaker and start the stop clock.

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