That happens because our eyes are trained to see things up close, so things far away don't look as clear, and they look smaller
What is the medical procedure called a D N C?
Dilation and curettage (D&C) is a brief surgical procedure in which the cervix is dilated and a special instrument is used to scrape the uterine lining.
Answer:
Independent: electronics in room
Dependent: hours of sleep
Control: school nights, night routine, lighting of room, the time the person decides to go to bed
Confounding: the person(?? not entirely sure on this one)
