This experiment has to do with foods and their nutrients. We are finding out how
much nutrients these 6 specific foods have and don’t have: cheese, hotdogs, egg
yolk, egg white and potato. We are testing them for starch, sugar, fat and
protein. For my hypothesis I will start with starch. I think that cheese would
not have that much starch in it for the reason of this cheese is a dairy it is
made out of milk. Hotdog’s don’t have starch because it is a meat and meat does
not have starch in it. My next food is egg yolk. Egg yolk is also a dairy so
just like cheese it is made out of milk also so egg yolk does not have starch
either. Egg white is a dairy too so it too has no starch. The only food that has
starch in it is potato. The reason for this is because it is a acid and it grows
in the ground. Next is sugar. I would have to say that I think sugar would be in
cheese, hotdogs, egg yolk and egg white. But I don’t think it would be in potato
again because they are grown in the ground. My next hypothesis is on fats. I
think hotdogs and cheese have fats in them but I think egg white and egg yolk
and potato’s don’t have fats. Next is protein’s. Proteins are very common in
foods so I think all of the foods we will test has proteins. MATERIAL’S Safety
goggles Hotdogs Cheese Egg yolk Egg white Potato Benedict’s solution hot plate
large beaker 5 test tubes test tube holder test tube rack crucible Lugol’s
iodine paper bag Biuret reagent EXPERIMENT: We started with testing starch. We
took a test tube and put one piece of hotdog in it. I put in drop of Lugol’s
iodine in it and waited for it to change colors.
The drop will turn black if starch is present. The drop showed that the hotdog has no starch in it. Next we
took a piece of cheese. We put one drop of iodine in it and it showed that
cheese also does not have starch in it. After that we took a piece of egg yolk
and put it in a test tube and put one drop of iodine as we did with the other
foods. That showed us that egg yolk does not have starch in it either. Next we
tested for egg white. We again put one drop of iodine the test tube. That showed
us that egg white does not have starch in it either so every food we have tested
so far has not had starch in it. We had one more food to test and that was
potato. We put in drop of iodine in it and it showed that the potato has starch
in it. Next we tested for fats. We took a brown paper towel and placed a piece
of hotdog and rubbed them together. Then we held the paper towel up to the
light. It showed that hotdogs do have fat in them. Next we took a piece of egg
yolk and rubbed it to the paper towel. The paper towel showed that egg yolk does
have fats in it. After that we tested cheese . We rubbed it on the paper towel
and it showed that cheese does not have fat in it. After we tested for cheese we
took a piece of egg white and again rubbed it to the paper towel and that showed
that egg white does have fats in it. The last thing we tested is potato. We
rubbed it to a paper towel and that showed that potato does have fat in it.
After we tested for fats we tested for sugar. We took a test tube and put in a
piece of hotdog in it. Next we put 10 drops of Benedict’s solution in it. After
that we put it in boiling water for 2 minutes. After 2 minutes the solution
showed that hotdogs do have sugar in it. After we tested hotdogs we took a piece
of cheese and put 10 drops Benedict’s solution in it and boiled it for 2
minutes. The solution showed that cheese has sugar in it. Next we tested egg
white and again put the same solution in it and boiled it for 2 minutes and that
showed that egg white does not have sugar in it. Next we did the same thing for
egg yolk. The solution showed that egg yolk also does not have sugar in it. Next
we tested for potato. We again used Benedict’s solution and boiled it for 2
minutes and the solution showed that potato does have sugar in it. The last
thing we tested for was proteins. For testing proteins we put a piece of hotdog
in a test tube and put 2 drops of Biuret reagent in it. That showed us that
hotdogs have proteins in them. The solution turned blue. Next we tested cheese.
We again put Biuret reagent in the test tube and that showed that cheese does
also have proteins in them. The solution turned purple. After that we tested egg
white. We did the same thing as the other 2 foods and the solution told us that
egg white does have proteins. The solution turned purple also. Next we tested
egg yolk. The solution turned light purple so that would mean it has a little
bit of proteins. The last food we tested was potato we again used Biuret reagent
and that showed us that potato’s do have proteins. The solution turned purple.
CONCLUSION: After we did the experiment we made a graph telling all the results.
For my hypothesis I got have of it right. For starches the experiment showed
that cheese, hotdogs, egg yolk and egg white do not have starch in them, as I
predicted. The only food that had sugar in it is potato. The foods that have
sugar in them are hotdogs, egg yolk and potato. Egg white and cheese do not have
sugar in them. I didn’t do so hot on that hypothesis. I thought cheese would
have sugar in them, I also thought egg white would but it doesn’t. Next is fats.
Out experiment showed that hotdogs, egg yolk, potato and egg white all have fat
in them. The only food that didn’t was cheese. I was right about the hotdog
having fat in them but I was wrong about cheese, egg yolk , egg white and
potato, they all have fat except for cheese. After fats’s there are protein’s. I
predicted that all the foods would have protein and I was right. Our experiment
showed that every food we tested had proteins in them.
