Question

1. caelyn wanted to find out what shampoo made her hair the shiniest. everyday she washed her hair with different shampoos and then rated how shiny her hair was, on a scale from 1-10. she used pantene, herbal essences, l’oreal, and just water.

a. independent variable (iv): ______
b. dependent variable (dv): ______
c. control: ______
d. constants: ______

Explanation:

Answer:

a. Type of shampoo (Pantene, Herbal Essences, L'Oreal, just water)
b. Shine of hair (rated on a scale from 1 - 10)
c. Factors like hair length, hair type, frequency of washing (other than the shampoo type), same washing method, same time of day for washing, etc. (any consistent factor kept the same except the IV)
d. Hair length (if kept same), hair type (if same), time between washes (if same), etc. (any factor that doesn't change during the experiment)