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

Thermal insulators.

Extracts from this document...

Introduction

Zeadon Jamil

Thermal insulators

Aim

To investigate different materials for the most effective thermal insulator for a house.

Introduction

Heat transfer is the gain and loss of energy.

There are three ways in which thermal energy can be transferred:

  • Conduction
  • Convection
  • Radiation

Conduction – this is when energy travels from molecule to another.  When one molecule receives energy it begins to vibrate and hits other molecules and makes them vibrate. And will spread throughout the object.

Convection – this will only occur in gases and liquids.  When heat is applied to the bottom of the substance, it will heat it up.  When it heats up, it will rise to the top, forcing colder areas towards the heat source and then they will receive energy and rise to the top, etc.

Radiation – it travels in waves.  When it hits a molecule it makes it vibrate.

I will be concentrating on conduction, as this is the main way in which thermal energy is transferred lost from housing.  Which means that I need something that is a bad thermal conductor (good thermal insulator)

...read more.

Middle

I think that the best thermal insulator will be the bubble wrap due to the fact that it contains trapped air.  Trapped air is a good insulator therefore it takes longer for energy to transfer through gasses because the molecules are further part, a vibrating molecule takes longer to hit into another molecule and make it vibrate.  The worst thermal insulator will be something that has compact molecules as it is easy for the vibrations to spread throughout.

...read more.

Conclusion

Evaluation

Although this experiment went well I felt that it could have been improved, for example. Having the same length and width of each material would have the experiment much better in fairness.  Also I was not able to repeat the experiment twice more due to lack of time which severely affected the accuracy of the results and investigation.  Finally having a thermometer for making sure the room temp stays the same

I think that the method was fine and has no problems of any sort except one:  testing the room temp and making sure it stays the same.

Conclusion

To conclude, this experiment was seemingly fair, however there is a margin for improvement.

The paper was the best insulator however I think this was an accident due to the trapped air.

I now know that the closer the molecules in an object the better the object is at conducting energy. Which means any thing with trapped air would be a sufficient insulator.  This is why they use double glazed windows as an insulator.

...read more.

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Here's what a teacher thought of this essay

4 star(s)

This is a well written and structured report.
1. The sources of information need to be referenced.
2. There are several pieces of information in the wrong section.
3. The evaluation should suggest further research opportunities.
****

Marked by teacher Luke Smithen 05/09/2013

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 Electricity and Magnetism essays

  1. Peer reviewed

    Investigation in resistance in wires

    5 star(s)

    In order to measure the current the ammeter must be connected in series with the Nichrome wire. Preliminary - Instructions * The equipment was put in circuit, like above. * The nichrome wire was measured using a wooden ruler. * It was cut using pliers * The nichrome wire was added to the circuit.

  2. To investigate which fuel gives out the most energy when burnt. We are burning ...

    The average of these results and my final result is: 137.6KJ/MOL * Ethanol This alcohol released 287.13KJ/MOL in the first experiment, and 276.65KJ/MOL in the second experiment. The average of these results and my final result is: 281.81KJ/MOL * Propanol This alcohol released 497.24KJ/MOL in the first experiment, and 360.09KJ/MOL in the second experiment.

  1. An in Investigation into the Resistance of a Wire.

    The wire that is not in between the two crocodile clips will get no electricity flowing through it because they are not part of the circuit. Step 5 Check that all the wires were connected properly to the other apparatus and then turn on the mains power and recorded the voltage and current for that length of that wire.

  2. Length vs Resistance

    The independent variable would be the temperature of the wire and the dependent variables would be the voltage, current and resistance for each different temperature. We would then have to keep the wire the same length, diameter and of the same material throughout the investigation.

  1. Discover the factors affecting resistance in a conductor.

    Preliminary Testing In order to conclude what method would be the most suitable to use in the investigation, I need to decide on a particular method that I deem to be the most suitable and the most efficient in order to carry out the experimentation to the best of my ability.

  2. Electromagnetism - investigating what effect increasing the number of turns in a coil on ...

    This is because; as we can see from out pretest that it is the lowest amount of turns which will holds a steady amount. I did not want to start at 10 turns, as it is unpredictable that the coil would have any affect on the soft iron core and I would definitely get a result.

  1. The resistance of wire.

    Due to this, the length increase should be directly proportional to the resistance increase. To measure and record the results for this factor is simple, the results would be collected and could show a connection between the length of the wire and the resistance given by the wire.

  2. I have been given several different types of crisps and asked to carry out ...

    Diagram Variables Input The variable I will be changing is the crisp. I will change it by using a different make of crisp. I will be using 5 different crisps. These crisps will be; Smiths Salt 'n' Shake, Walkers Ready Salted, Walker Lites Ready Salted, Walker Lites Cheese and Onion, and Hula Hoops.

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