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The aim of this experiment is to find out the effect of heat on a bouncing ball.

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Aim The aim of this experiment is to find out the effect of heat on a bouncing ball. Prediction I think that the more heat that is given to the ball the higher the ball will bounce, because the particles in the ball will collide faster making it bounce higher. Fair test To make sure that the test is fair you must: 1) Use the same ball because if you use different balls each time it will give different results. 2) Drop the ball from the same height to ensure that it is fair, or else if you drop once from the top and once from the middle it will give different results and will not make it fair. 3) Drop the ball on the same surface because if you drop the ball on a surface e.g. wood then you drop the ball on a marbled floor it will give two different results, & will not make it fair. 4) Do the experiment 3 times for each temp, e.g. 3 times for 50�c, 3 times for 60�c.... to give an average result. 5) Use the same apparatus to give a fair experiment. 6) Use the same quantity of water each time to make the experiment fair. 7) Measure from the top of the ball to give an accurate reading. 8) Heat the ball in the water fully submerged because it will not be fair if you just heat only half. ...read more.


* Find an assistant because you will need help, it will be hard for you to read off the measurement as well as dropping the ball. * Draw a table like in diagram (2b). The table should start from 20�c not from 10�c because of the room temperature, but if you do want to start at 10�c you will wave to put the ball in ice. * First soak the ball fully in the water at 20�c use a pair of tongs. * Then with the help of the clamp stand one of you (you or your assistant)? Drop the ball from the top of the 1-meter ruler, on the table. * Whilst one of you are doing this the other one should observe the bounce (once) of the ball and see were the top of the ball goes up to on the 1- meter ruler. * Do the drop three (3) times to get an average reading at the end. Do this constantly with each temperature do not reheat. * After you have done one temperature go on to the next one and do the same. * To go on to the next temperature heat the water and the ball with the tongs till you get to the temperature you need, check with the thermometer. * Do this until you have finished your table * After you have finished the table work out the average by adding the set of results on a temperature and divide by three e.g. ...read more.


You can see this on the graph. But for 70?C it's the opposite this is an anomalous result. I think I went wrong there so next time I should do it accurately. Particles in a solid Particles in a liquid Particles in a gas I have found out that why the ball bounces higher when heat is given to it because everything is made of particles, the particles in a solid are packed together. The particles in a liquid are free to move in a compound shape. The particles in a gas are free to move, when heat is given to these particles they gain energy and move faster. The particles in a squash ball are packed together so when heat is given to it the particles gain energy and they start to collide and make the ball bounce higher. The prediction that I made was right, to the evidence I have found. The only problem is that the experiment went a bit wrong when I did the 70?C results, I think I plotted the results wrong. My results support my prediction. The patterns I can see on the graph is that the first test result is higher than the last test result because the ball gets colder. As the temperature increases, the higher the bounce is. The graph is almost straight at 60?C but at 70?C the graph twists. There is a great jump at 100?C. ...read more.

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