This week in Science we have been learning about nutrition and digestion. At the start of every lesson we do Quizlet.com for about 15mins to learn about the topic before we do a experiment, also sometimes we do a test at the start of every topic. On Tuesday we have been looking at what are nutrients and here are some of the nutrients: carbohydrates, proteins, lipids (fats and oils), minerals, vitamins and fibre. After that we looked at what each one of those things are and what they do. Then we were looking at what are complex and simple sugars, what are carbohydrates, what are proteins and what are lipids. After we learnt all of that we did a experiment where we had to test food, liquids then we had to see if they are complex sugars or not. The food we are testing are bread, egg white, milk, apple, sugar, potato. Next we had to get into a group of 2 to do the experiment and my partner was Gerald. Then we got the equipment so we needed a test tubes, a test tube rack, iodine and the food/liquids.
Experiment 1 - Tuesday
Once we got the equipment we got the test tube and we put it into the test tube rack, next we got the first food item and it was the bread. Then we put about 5 drops of iodine into the test tube and to know if it is complex sugars or not it would have changed colour to black but if it isn't complex it would not have changed colour. Then we had to empty out the test tube into the sink but during the experiment if you got iodine onto your skin you had to wash it off with cold water because iodine in quiet dangerous. Next we had to do the same thing with the rest of the food and liquids. By the end of the experiment we should of had the result written down on a peice of paper.
Results:
Bread - Complex
Apple - Non complex
Potato - Complex
Sugar - Non complex
Egg white - Complex
Milk - Complex
Experiment 2 - Friday
On Friday we did the same thing as Tuesday were we had to do the quizlet and then we got the equipment ready for the experiment. For this experiment it is the same as Tuesday's but we are seeing what food or liquid is a simple sugar or not. Here are the results we got.
Results:
Milk - Simple
Egg white - Simple
Bread - Non simple
Sugar - Simple
Apple - Non simple
Potato - Non simple
Experiment 3 - Friday
After we finished the 2nd experiment on Friday we did the 3rd experiment it is the same one but we were seeing if the food and liquids had protein in it or not. We got the equipment and stuff ready for the experiment just like normal and then we got into it. It was so satisfying because the liquids turned purple straight away and if they turn purple it means there is protein. Here are the results we got.
Results:
Bread - Has some protein
Egg white - Protein
Milk - Protein
Apple - Non protein
Sugar - Non protein
Potato - Non protein
Here are the photos of some of the equipment and results:
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