Question

lisa is working on a science project. her task is to answer the question: does rogooti (which is a commercial hair product) affect the speed of hair growth? her family is willing to volunteer for the experiment. 21. using the scientific method, describe how lisa would perform this experiment. - formulate a hypothesis - create experiment that tests your hypothesis - identify 1. control group 2. independent variable 3. dependent variable 4. procedures 5. what data will you collect?

Explanation:

Step1: Formulate a hypothesis

A possible hypothesis could be: "Rogooti will increase the speed of hair growth."

Step2: Create the experiment

Divide Lisa's family members into two groups. The control group will not use Rogooti, while the experimental group will use it as per the product - instructions.

Step3: Identify components

1. Control group: Family members who do not use Rogooti.
2. Independent variable: The use of Rogooti (used or not used).
3. Dependent variable: The speed of hair growth.
4. Procedures: Measure the length of hair of all participants at the start of the experiment. Have the experimental group use Rogooti for a set period (e.g., 3 months) and the control group not use it. Measure the hair length again at the end of the period.
5. Data to collect: Initial hair length and final hair length of each participant in both groups.

Answer:

Hypothesis: "Rogooti will increase the speed of hair growth."
Control group: Family members who do not use Rogooti.
Independent variable: The use of Rogooti (used or not used).
Dependent variable: The speed of hair growth.
Procedures: Measure initial hair length, have experimental group use Rogooti for 3 months and control group not use it, measure final hair length.
Data to collect: Initial and final hair lengths of each participant in both groups.