Food Testing

Aim: What nutrients are present in different food.

Hypothesis: We are testing for simple sugar, Complex sugar and protein. The things that we are testing are bread, egg, glucose, apple, milk and potato.

What I think:

Bread: Complex sugar

Egg: Protein

Glucose: Simple Sugar

Apple: Simple Sugar

Milk:  Protein & Complex Sugar

Potato: Protein & Complex Sugar

Method for complex sugars: put two drops of iodine in the test tubes and wait.

Results

The bread turned black with the iodine. So it has complex sugar.

The apple turned black so it is positive.

The potato was positive.

The egg, the milk and the glucose were negative for complex sugar.

Method for simple sugars: Put 5 drops of Benedict's regnant in and heat.

Results

The Glucose and the apple were positive. 

The potato had a tiny bit but was not fully positive

The egg, milk and bread were negative 

Method for protein: Put 5 drops of sodium hydroxide and 5 drops of copper sulphate and shake

Results:

Milk and egg positive.

Apple, potato, bread and glucose negative. 

Conclusion: The conclusion was I got 4 out of 6 things right in my hypothesises.

Discussion: I think this test was fun to do and the two tests that I did were successful. I learnt that simple sugars give a fast burst of energy. That complex sugars give slow bursts of energy. Also that protein mostly comes from animals.