Question

question 7
a student wants to find out which kind of fish food is the most nutritious. four groups of fish get different foods: regular flakes, pellets, freeze - dried shrimp, and bloodworms. their weight is measured daily. what is independent variable?
age of fish
weight
type of fish food
amount of food

Explanation:

An independent variable is the factor that is changed or manipulated in an experiment. Here, the student is changing the type of fish food (regular flakes, pellets, freeze - dried shrimp, bloodworms) to observe its effect on the fish (measured by weight). The age of fish and amount of food are not mentioned as being varied in the context of testing for the most nutritious food. Weight is the dependent variable (what is being measured as a result of the change in the independent variable).

Answer:

Type of fish food