Marcos's Study Suggested That Elementary Students Who Watch TV More

question 21

Multiple Choice

Marcos's study suggested that elementary students who watch TV more than three hours a day are more likely to be overweight than students who watch less TV.In this study, students' weight is

• A)An independent variable
• B)A dependent variable
• C)A mediating variable
• D)A moderating variable

---

Definitions:

Pupil

The central, circular opening in the iris of the eye, which regulates the amount of light that enters the eye to reach the retina.

Iris

The colored part of the eye surrounding the pupil, responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina.

Visible Light Waves

Electromagnetic waves that are visible to the human eye, which perceive them as colors.

Pupil

The adjustable opening in the center of the eye that allows varying amounts of light to enter.