Final answer:
In Caelyn's experiment to find the shiniest shampoo, the independent variable is the type of shampoo used, and the dependent variable is the resulting shine of her hair. She also had controls and constants to maintain the reliability of her experiment.
Step-by-step explanation:
The student, Caelyn, conducted an experiment to determine what shampoo made her hair the shiniest. In this experiment:
- Independent Variable: Type of shampoo (Pantene, Herbal Essences, L’Oreal, and water)
- Dependent Variable: Shine of hair (rated on a scale from 1-10)
- Control: Use of water as a baseline for comparison
- Constant: Conditions under which the hair was washed and rated for shininess
An experiment is a methodical trial and study aimed to discover, prove, or disprove a hypothesis, or to learn the truth of a predicament. The independent variable is the factor that is changed or manipulated during an experiment, and the dependent variable is the factor being tested and measured. In another example, if a scientist grew bacteria on two types of gel to see which one encourages faster growth, the independent variable would be the type of gel (A or B), and the dependent variable would be the amount of bacterial growth.