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cheesy snacks

created by Wilma and Holly 25-04-2013
by

Holly Johnson

on 26 April 2013

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Transcript of cheesy snacks

0 + - = 9 8 7 1 2 3 4 5 6 c Cheezels 2.4 grams- starting weight.
0.6 grams - once burned.

20 C - starting temperature.
73 C - once burned.

Difference in weight -2.2 grams.
Difference in temperature- 47 degrees. Twisties 0.6 grams- starting weight.
0.2 Grams- once burned.

20 degrees- starting temperature.
24 degrees- once burned.

Difference in grams - 0.4 grams.
Difference in temperature- 4 degrees. Created by Wilma & Holly - Conclusion

A) Did you achieve your aim?

Yes we did archive our aim- to determine which cheesy snack has the most energy.

B) How could your experiment be improved?

We could improve our experience by changing our environment to a more compact and sterile one where the heat would have no where no go except our experiment. 5. Covert your answers for questions 3 & 4 into kilo joules. (1000kj=joule) When you convert the joules of the cheezel into kilo joules it becomes- 91.89 kj How do your answers from question 5 compare to the nutritional information on the snack packaging? If there are discrepancies between their results and yours - discuss why. The cheezles. They heated the water 47 degrees more than its initial temperature. Cheesy snack prac... Cheezles 1. Which cheesy snack heated the water the most? 3. If you burned 100g of cheezels how
much energy would be released? 91,894 joules. Wilma's discussion questions How do your answers from question 5 compare to the nutritional information on the snack packaging? If there are discrepancies between their results and yours - discuss why. cheezel- I would say that our results and the information on the package are really different and whoever put the information on the package either found the biggest cheezel in the world and recorded that result or they are straight up lying. I do think though that when they record results like this they have a more controlled and serious environment that our classroom at school so they would probably get a higher amount of kilo joules that we did, but still 2220 kj is a lot compared to the 91.89 kj we got and I do not think they are being entirely honest and that is wrong. 2. If it takes 42 joules of energy to increase the temperature of water by 1 degree, how many joules were in the cheezels? 2,209 joules. 2. If it takes 42 joules of energy to increase the temperature of water by 1 degree, how many joules were in the twisties 188 joules 4. If you burned 100g of twisties how much energy would be released? 31, 333 joules 5. Covert your answers for questions 3 & 4 into kilo joules. (1000kj=joule) When you convert the joules of the twisties into kilo joules it becomes - 31.3 kj In the prac on cheezels and twisties we archived quite a low amount of kilo joules compared to what was on the packages. We recorded 31.3 kj and on the the package it's says 2050 kj and so for the twisties I think they are possibly lying about it. On the contrary I do realise that the results are recorded differently but the difference is still so big that I still doubt they are being honest about it the recorded kjs. Created by Wilma & Holly
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