A school principal wants to observe if natural light has an effect in the classroom learning. The principal randomly chooses two groups of students of the same age and grade, and places both groups in rooms on opposite sides of the school, one facing east and one facing west, during a 10 am class. The test scores of both classes are compared at the end of the semester. How could this observation be changed into a valid experiment of the effects of natural light?

A. by introducing adjustable light fixtures in each classroom

B. by introducing adjustable blinds in each classroom

C. by tinting the windows in bith classrooms with the same film

D. by including classrooms facing north and south

Question

Guest

23 August, 02:02

+3

Answers (2)

Know the Answer?

Valentina Hall · Answer 1

It is actually B, because with the blinds you can cancel out the natural light if need be

Ramiro Braun · Answer 2

A. by introducing adjustable light fixtures in each classroom