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  • Level: GCSE
  • Subject: Science
  • Essay length: 1157 words

This investigation is about what factors affect the speed of boiling water-cooling to room temperature.

Extracts from this essay...

Introduction

This investigation is about what factors affect the speed of boiling water-cooling to room temperature. Factors which may affect how quickly hot water cools down are- * Material container is made from * The volume of hot water * Using a lid * Starting temperature of water. Aim of investigation The aim of this investigation is to find out how the type of container affects the way hot water cools down to room temperature. I am going to be using 4 types of container- copper, plastic, glass, and polystyrene. Prediction and Scientific Theory I predict that the polystyrene cup will keep the most heat because it is the best insulator. Polystyrene is a good insulator because it contains particles of air making it a bad conductor of heat. I predict that the copper cup will keep the least heat because it is a good conductor of heat. Fair Test To make the experiment a fair test I will- * Use the same amount of water. * Make sure the starting temperature is the same.

Middle

Evaluation I think my investigation was successful; it produced clear results in keeping with my prediction and scientific theory. There were no surprising results. Although it was hard to get the starting temperature the same it was eventually achieved. Making my results clearer and easier to draw conclusions from. The investigation was successful but I still feel it could have been improved to make my results more accurate. The measuring of the water was done quickly using a glass beaker to prevent the water cooling before I started my experiment the experiment would have been more accurate if I had measured the water using a measuring cylinder. Other factors that could be investigated are: * Surface area. * Insulation. * Stirring. * The use of a lid. Aim of Investigation The aim of this investigation is to find out how the Surface area of the opening of the container affects the way hot water cools down to room temperature. I am going to use two glass beakers one with the capacity to hold 200mls of water, with a diameter of 7.5 cm and a surface area of 44.179 cm.

Conclusion

These results show us that the water-cooled fastest in the beaker with the larger capacity, diameter and surface area. This is because a lot more hot air was able to escape. The beaker with the smaller capacity, diameter and surface area retained the more heat because less hot air was able to escape. Evaluation I think this investigation was quite successful although not as successful as the first experiment. The results this experiment produced were less clear because the starting temperatures were very different. It was still possible draw conclusions from the results and these results were in keeping with my prediction and scientific theory. This investigation was successful but as I did with the first experiment I think improvements could have been made to make my results clearer and more accurate. As in the first experiment the measuring of the water was done quickly using a glass beaker to prevent the water-cooling before I started my experiment. The experiment would have been more accurate if I had measured the water using a measuring cylinder. I was unable to get the starting temperatures of the water the same. If I had been successful the results would be clearer and easier to draw conclusions from.

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