scientific method
observe:The apple slices turns brown.
1.what is the problem in this activity?
2.formulate your hypothesis.(list down at least three hypotheses)
3.what is the dependent variable?
4.what is the independent variable?
5.analyze your results.which type of liquid will prevent the apple from turning brown?
a.lemon
b.milk
c.soda
d.water
Answers & Comments
Answer:
Apples contain an enzyme called polyphenol oxidase (PPO). When you slice open an apple, the PPO reacts with the oxygen in the air and enzymatic browning occurs. The chemical reaction between the PPO and oxygen produces melanin, which is what gives the apple flesh the brown color.