A group of scientists is testing a new chemical to determine if it will act as a

Question

A group of scientists is testing a new chemical to determine if it will act as a sunscreen and prevent sun burn. The same amount of lotion is applied to each person in the same size area and the test subject's arm is exposed to direct sunlight.The amount of redness is measured every 5 mins for a total of 30 mins. For each person tested, 3 different lotions are applied to the test subject's arm:

1. a lotion with the new sunscreen chemical called Sun X.

2. a lotion with a different active sunscreen chemical that has been sucessfully used for many years called Sun Kissed.

3. a lotion that has all the same ingredients as the sunscreens except it has no nactive unscreen chemical.

1. What question is being asked in the experiment above?

2. What hypothesis is being tested in the experiment described above?

a. Is the hypothesis testable and fausible? Explain Why

3.What is the prediction based on the hypothesis?

4.What is the independent variable in this experiment?Explain why

5. What is the depende t variable in this experiment?Explain why

6. Which group of patients is the experimental group? Expalin why

7. which group of patients is the negative control? Explain why

8.Which group of patients is the positive control?Explain why

Explanation / Answer

Please find the answers below:

Answer 1: According to the information, it can be clearly seen that the question being asked or tested in this experiment is to investigate the efficiency of new potential sunscreen candidate in preventing sunburns.

Answer 2: The hypothesis being tested here is that exposure to sun causes sunburns and a sunscreen lotion will prevent these damages.

Answer a: The hypothesis is testable because appropriate positive and negative controls are available in the study. Further, the potential sunscreen must have been previously tested for some leading investigations, thus prompting to conduct experiments on humans.

Answer 3: Based upon the predictions, it is stated that longer is the exposure to sunligher, more will be the extent of sunburn. Hence, it is advisable to perform data acquisition and analysis on short periods of time.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.