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

Heat Loss Investigation

Extracts from this document...


Biology Coursework In this experiment, I will test different types of material and how they affect heat loss from the body. The materials I will use are; wool, cotton wool, cotton, felt, foam, polystyrene and newspaper. As it is difficult to accurately measure which materials stop heat loss from the body, I will instead measure heat loss from a conical flask. I will be testing which material insulates the best, and I will keep all the other variables constant. As 36.9�C is quite a low temperature I will use a higher one, 80�C, to test each material. The amount of water, as well as the starting temperature will be kept constant throughout; as will the size and shape of the conical flask. There will be a beaker around the conical flask, holding the insulator, so this test is on a constant volume, rather than mass of insulator. There will also be another flask with no insulator, but with all other variables constant. ...read more.


The reason air insulates is because it is a gas and a) has no free moving electrons and b) its atoms are spread far so it is harder for the heat to radiate. Each material has a different structure and this depends on whether it will insulate or not. For example: Wool has an almost honeycomb structure but these air gaps could be too big so the air will escape. Convection occurs because the air around is heated by the water and becomes less dense and therefore rises. The bung in the top of the flask stops this to a certain extent, however, large air spaces allow convection. Foam, when packed properly, has none of these and should be a good insulator. Radiation occurs through the foam, however, some may be reflected by the white, shiny colour, which best prevents against radiation. In the experiment, after the glass has been heated, the insulator will allow quite rapid heat loss as the insulator and air pockets are warmed. ...read more.


Boil water with a kettle, measure out 200cm� of this water. 2. Add it to a conical flask that is sat in a beaker and surrounded by one of the insulating materials, as shown above. 3. Record the initial temperature and the temperature at one-minute intervals for twenty minutes thereafter. 4. Repeat the steps 1-3 for each insulating material, (including with no material at all - this is the control). 5. Repeat the whole experiment 3 times to eliminate experimental error as much as is possible, and to give a number of readings to take an average from, giving a more accurate set of results. Preliminary Work ???????? ????????????????????? ???? ?? ??????????? ?? ????????? ? ?????? ?? ??????????? ?? ???? ???? ???? ??? Preliminary results prove that an insulated flask keeps the temp drop lower. They also show that Wool was the worst insulator and Foam was the best. Analysis As we can see from the results, all the materials provided some if not a lot of insulation. We can also see that as time increases, temperature decreases but not proportionally. If we look at the results we see that ...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 Resistant Materials 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 Resistant Materials essays

  1. In this investigation I aim to find out which materials are the best insulators. ...

    Also, the position in which the thermometer was in could have affected the rsults, as the water is warmer in the middle. I could have used a clampnd to hold the thermometer in a fixed position; by doing this I could ensure that the thermometer is always at the same place in the water.

  2. The Effect of Different Types of Insulation on Heat Retention

    * Cover one of the cups with one layer of cotton. * Fix the fabric on the bottle with the help of rubber bands. * Pierce the lid, with a thermometer, and fix it to the cap with "Play-do". * Repeat # 3, 4, and 5 with foam, aluminium foil, and bubble wrap and prepare a "control" without a fabric.

  1. Testing different types of insulation to see which is the best at keeping in ...

    air inside the bubbles, and air is a bad conductor of heat therefore the heat wont be able to escape from the water as easily. And I also predict that foil will be the worst material because it is a metal and all metals conduct heat therefore the foil will

  2. Communication of Safety In the Design Phase.

    Whilst fines should avoid the risk of causing bankruptcy there may be cases where an offence is so serious that the defendant ought not to be in business. This precedent could hit the construction industry hardest, where until recently fines were relatively low.

  1. My aim of this experiment is to recognize which material is the greatest sound ...

    After these have been cut out to the required size, I would then using double the cellotape and stick the material onto the cardboard with the cellotape holding the insulation and cardboard together. Once I have stuck the insulation material to all five sides of the cardboard box I will

  2. The task has been set to make a hole punch (used to punch holes ...

    Blanking and piercing is more of an industrial process. Batch Production It would be intended that my hole punch will be made as a prototype before making many more replicas for batch production. In industry most products are manufactured using batch production methods to speed up the process and to ensure they are identical.

  1. Can heat loss be minimised by using materials such as polystyrene, fur, felt or ...

    o Polystyrene is a bright, matt material which may allow some heat loss; however, due to air that is trapped within it, the air will become part of the insulator. o Copper is a dark matt surface which won't reflect, however, heat may still be lost o Most heat will be lost through radiation.

  2. Which Material is the Best Insulator?

    The darker materials will absorb the heat and release it the other side so is a bad insulator. The thickness and density of the material will also have a significant impact on the materials efficiency. Air is a very poor conductor, so materials with lots of large air pockets will be good insulators.

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