Question

abbey always gets zits on her chin and she cant figure out the best method to get rid of them. she decides to test several products to see which clears her face up fastest: washing with soap and water, washing with an acne face wash from the pharmacy, and washing her face with organic oils. for one week she just washes her face with water. the next week she washes every day with soap and water. the following week she uses the acne wash, and the last week she uses the organic oils. each week she records the number of zits she has on her chin at the end of the day.

1. independent variable
2. dependent variable
3. hypothesis
4. control group
5. experimental group
6. constants
7. possible threats to accuracy of results?

Explanation:

1. The independent variable is what is changed in the experiment. Here, it's the face - washing method.
2. The dependent variable is what is measured. In this case, it's the number of zits on her chin.
3. A hypothesis could be: "Using an acne face wash from the pharmacy will clear up zits on the chin faster than soap and water, organic oils, or just water."
4. The control group is the group with no treatment change. Washing with just water is the control group as it is the baseline.
5. The experimental groups are the groups with different treatments. Washing with soap and water, acne face wash, and organic oils are the experimental groups.
6. Constants could include Abbey's diet (if it remains the same), her sleep schedule, and the time of day she washes her face.
7. Possible threats to accuracy could be external factors like stress levels (which may change week - to - week), hormonal changes, or exposure to different environmental pollutants.

Answer:

1. Face - washing method
2. Number of zits on her chin
3. Using an acne face wash from the pharmacy will clear up zits on the chin faster than soap and water, organic oils, or just water.
4. Washing with just water
5. Washing with soap and water, acne face wash, organic oils
6. Abbey's diet (if unchanged), sleep schedule, time of day she washes her face
7. Stress levels, hormonal changes, exposure to environmental pollutants