Question

1. taylor wanted to see if eating apples would help her do better on her classwork. the first day, she didn’t eat any apples. on day 2, she ate one apple; on day 3, she ate 2 apples; and on day 4, she ate 3 apples. each day, she recorded the grades she got on her science work.

a) independent variable (iv):

b) dependent variable (dv):

c) controlled variable(s):

Explanation:

Part a)

The independent variable is the factor that is manipulated or changed in an experiment. Here, Taylor is changing the number of apples she eats each day. So the independent variable is the number of apples eaten.

The dependent variable is the factor that is measured or observed to see the effect of the independent variable. Taylor records her science work grades to see the effect of eating apples, so the dependent variable is her science work grades.

Controlled variables are factors that are kept constant to ensure a fair test. In this experiment, factors like the type of classwork (science work, kept consistent), the time of day she does the work, her study routine (if any) should be controlled. A likely controlled variable is the type of classwork (science work) or other factors like the time she spends on the work, her study environment, etc. (any factor that is kept constant to not interfere with the relationship between apples eaten and grades).

Answer:

Number of apples eaten

Part b)