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How the volume of water affects the time it takes to boil.

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The Plan * Q. What am I trying to find out? * A. How the volume of water affects the time that it takes to boil. * Q. What do I think will happen? * A. The larger the volume the longer the time to boil. * Q. Why do I think it will happen using scientific ideas? * A. The larger the volume, the more atoms you need to heat. * Q. What will I measure? * A. Time versus volume. * Q. What will I alter between observations? * A. The volume of water. * Q. What will I do to ensure a fair test? * A. Keep everything the same except the input variable: volume. * Q. How will I decide on the values of the variables that I will be using? * A. Values will be chosen to enable the experiment to be carried out in a reasonable time, and to give a good range for trend analysis. ...read more.


Ignoring the fact that the last point is an anomaly the time taken to boil is roughly proportional to the amount of water boiled. Conclusion We can see that the time taken for the water to boil is between 105 and 149 seconds for each 50ml of water boiled. If we had used more heat energy then the process would be a lot quicker but if we had used less energy then it will have been slower. If we had boiled more water then the time would be longer. Explaining My Conclusion Using Scientific Ideas The time taken to boil 200ml of water should take twice the time as boiling 100ml would be if everything else is kept the same. I.e. if 100ml takes 120 seconds to boil then 200ml should take twice as long to boil (if all other variables are unchanged). If a variable were changed, however, then would change the results, for example: * Heat energy, * The shape of the beaker, * The height of the beaker from the heat. ...read more.


Another way would be to change the heat energy of the flame so that you can see the variation that would occur between the two types of flame. One quicker, one slower! Other Experiment/s To Validate My Conclusion: 1. Boil 50mls of water first in a normal sized beaker and then a round one. You should see that the round beaker will take longer than the normal one for its water to boil 2. Boil 50mls of water as accurately as possible. Then boil 100mls. The 2nd result should be double the first! Thank you for reading my investigation. I hope that you understood it all and that you saw all the key points! I eventually managed to do everything from the prompt sheet but it took me over 6hrs!!!! I would like to thank Pearce Gunne-Jones (my partner in the experiment) and Peadar Boyle and Karan Sawhney who made it possible for us to carry out the experiment. Also thanks to Dr. Allen who guided us through the harder parts of the experiment. Have a gr8 summer holiday!!!!! James Gleeson-8C ...read more.

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