Question

Levi is conducting a comparative experiment where he is comparing the average temperature in cities and nearby rural areas. He finds that cities are on average one degree warmer than rural areas. What is a major limitation of his experiment?
A) Large amounts of information can be gathered.
B) It is repeatable.
C) He can not definitively show what causes the difference.
D) There is an independent variable and a dependent variable.

Answer 1

The major limitation is that C) he can not definitively show what causes the difference.

It may be caused by something the people are doing (if so, what?) or it may be caused by some environmental differences or a combination of both.