Science



☒ Not achieved ☑Achieved☑☑Advanced
 * Science Fair Marking Term 2 2011**

☑Clear aim/hypothesis carried through ☑Method, accurate experimentation ☑Accurate experimentation, controls, variables, repetitions ☑Results clear, accurate, include appropriate data ☑Conclusions are in line with aim/hypothesis ☑Results are interpreted and discussed (conclusion)
 * Scientific Process and Background:**

☑Design of the experiment ☑Use of apparatus and materials
 * Technical Skill:**

☑Imaginative/creative ideas ☑New/Unusual application in science
 * Originality:**

☑Colour/form/clarity/graphics ☑Innovative appeal
 * Presentation of Display:**

☒ Authentic ongoing record with raw data included ☒ Has supporting documentation, bibliography, acknowledgements
 * Log Book:**

Rose this is a very interesting Science Fair, I had a similar hypothesis to you. I was very surprised that the carrot had the 2nd highest amount of water as it seems like such a solid vege. Rose it is always good to include a reason based on research. You commented that potato had fibre and starch and wondered weather this made a difference to water content, you could have found some information on this if you had done some further research (backed up your findings).
 * Teacher Comment:**

I think that I could have done my science fair better by drying out the food more to make the results more actuate. I also think that I could have done more tests so that the results were more accurate.
 * Student Comment:**

**Good start Rose. Your introduction refers to fruit however your Aim & Method include vege's ?? you might need some editing here. Please start your experiment as soon as possible as this will take time for the fruit to dry out. The food tec department have some food dehydrators if this will help, just ask & I'll get one. Don't forget to take lots of photos.**

__Introduction__

Human bodies contain around 55%-60% of water in adults. We all need to drink about 8 glasses of water a day. One way to get this is drinking straight water out of a glass, and another way is to eat plenty of juicy fruit and vegetables.

Fruit and vegetables are an essential part of an every day diet because of all the vitamins and nutrients that they have. They are commonly used for juicing and are also a great source of water. I thought that it would be interesting to find out how much water that they had and which one would contain the most water.

__Aim__

Will an apple, banana, carrot, onion, pear, kiwi fruit or potato contain more water and what percentage of water will there be?

__Hypothesis:__

I think that kiwi fruit will contain the most water because they are very juicy when you eat them

I think that bananas will have the least amount of water in them because they aren’t very juicy when you bite into them.

__Materials:__

1x Apple 1x Banana 1x Onion 1x Carrot 1x Potato 1x Kiwi Fruit 1x Pear 1-3x trays 1x scales 1x knife 1x oven

__Method:__

Weigh all of the fruit and record the weight. Slice the fruit around 5mm- 1cm. Weigh the fruit again and record the weight. Turn the oven onto a low heat setting. Lay the fruit on the trays and put in the oven and wait till it is completely dried out. After it has dried weigh the fruit again and calculate the percentage of weight that the fruit has lost and you will have your answer of how much water the fruit contains.

__Results:__


 * || **Banana** || **Onion** || **Carrot** || **Apple** || **Kiwi fruit** || **Pear** || **Potato** ||
 * Original weight || 110g || 100g || 137g || 184g || 111g || 139g || 129g ||
 * Sliced weight || 109g || 99g || 137g || 181g || 109g || 133g || 128g ||
 * Dried weight || 38g || 15g || 25g || 54g || 22g || 31g || 33g ||
 * Percent of water contained || 65.5% || 85% || 81.8% || 70.7% || 80.2% || 77.7% || 74.5% ||

__Conclusion__

In my test I found out that my hypothesis was partly wrong and part correct. I thought that A Kiwi fruit would contain the most water but it turned out that an onion did. The part of my hypothesis that was right was that I thought a banana would contain the least amount of water.

I think that part of the reason that a banana has a smaller amount of water than the other fruit and vegetables is because a lot of it is made up of carbohydrates and fiber. What this doesn't explain is why a potato had a high amount of water when it is also a high energy food.

I found it surprising that an apple had the 2nd lowest amount of water in it because biting into them they seem really juicy. If I was to do this experiment again I would try using food dehydrators and see if there would be a difference in my results.

**//Rose I can not proof read & edit work that is not here! 10.05.2011//**