Presentation on theme: "26 27 X Food Test Experiment: Hypothesis (for unknown Sample):"— Presentation transcript:
1 26 27 X Food Test Experiment: Hypothesis (for unknown Sample): Conclusion:Known SamplesFood SampleObservations (picture and words)Grease Stain?Iodide Color Change?Nitric Acid Color Change?Unknown SampleX2627
2 Procedures: Testing for Lipids Place a small piece of 3 samples on top of a paper napkin. Leave it there for a minute.Make an observation for each sample and write it on your chart (a picture and some words)Move the food samples at least 2 inches above or below where you initially placed the sample.If there is a grease stain on the napkin, we can assume the food sample(s) contains the following macromolecule: Lipids! Record on your chart (Yes or No)
3 Procedures: Testing for Carbohydrates 4. Place another small piece of all 3 samples on a paper napkin.Place 3 drops of iodide on your food samples. If the iodide changes color, then you can assume that the food sample(s) contains the following macromolecule: Carbohydrates!Record on your chart whether or not your sample changed color
4 Procedures: Testing for Proteins 6. Place yet another small sample of the same 3 food sample. Your co-teacher will place a drop of nitric acid on your food samples.If the drops of nitric acid changes color, then you can assume that your sample(s) contain the following macromolecule: Proteins.Record whether or not your sample changed color.
5 Left SideHypothesis: Form a hypothesis about your unknown. What kind of macromolecules do you think the unknown contains? Do you think there will be a grease stain or/and color change?
6 What is a conclusion? The final step in the scientific method. a summary of the experiment's resultsBased on your results was your hypothesis Rejected or supported? Why?
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