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My aim is to find out which material is the best insulator out of Black paper, Bubble rap, Foil and Cotton wool.

Extracts from this document...

Introduction

Hamid Azizi 10x1                                                                   Science Coursework pg

Insulation

Planning

My aim is to find out which material is the best insulator out of Black paper, Bubble rap, Foil and Cotton wool.

Prediction

I would predict that Foil will be the best insulator then bubble rap next cotton wool and lastly it will be black paper.

I think foil will be the best insulator because its shiny and because of that, the heat that tries to escape will be reflected back by radiation. Bubble rap will probably be the second best insulator because its like double-glazing windows it has air between the plastic to prevent conduction and radiation.

I think then it would be cotton wool because I think the hot air might escape through it.

I think Black paper will be the worst insulator because its black and the heat will be absorbed and lost by radiation.

Equipment

These are the equipment that I will need and use in my experiment. I will need a beaker to warm up the water up to 75 degrees, a measuring cylinder to measure 100 ml of water, a thermometer to be able

...read more.

Middle

 I noticed in my results that for cotton wool and foil the temperature only went down 1 or 2 degrees every two minutes but for bubble rap and black paper it lost 5 or 6 degrees each time.

Best insulator

My prediction

My results

1st

Foil

Cotton wool

2nd

Bubble rap

Foil

3rd

Cotton wool

Bubble rap

4th

Black paper

Black paper

As you can see my prediction wasn’t really correct according to my results because of cotton wool, I thought that its going to loose heat by the hot air going through it, but the air cant just travel through it because it’s a solid.

Heat Transfer

Heat energy causes molecules in gases and
...read more.

Conclusion

Something that really contributed in my results was the room temperature because I did the experiment in a period f two days. The temperature might have been lower in the second day and that might have caused the temperature in the beaker to come down quicker. Next time I will hopefully try to finish the experiment in one day. When I did my experiment I covered the whole beaker with the material to make a fair test, but I didn’t cover the bottom of the beaker. I know that heat rises but their still could be some heat lost from the bottom of the beaker.

I think my results were not enough to make a firm conclusion because the first try of the experiment was very inaccurate so my average results didn’t come out very accurate.

I can extend my work by taking the temperature every one-minute and doing that for a longer period of time. I can also try out different materials or even possibly doing a combination of two different materials together.          

...read more.

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