Question

question 8 of 10
why are experiments often performed in laboratories?
a. they are better at representing the real world.
b. scientists only want to know what happens in labs.
c. it is harder to control variables in a laboratory.
d. there are fewer variables to control.

Explanation:

In a laboratory, scientists can control variables more precisely. Fewer variables to control (Option D) allows for more accurate determination of cause - and - effect relationships. Option A is incorrect as laboratory experiments are often more controlled, not better at representing the real world. Option B is wrong because scientists want to know what happens in a controlled environment (the lab) to understand broader principles. Option C is incorrect as it is easier (not harder) to control variables in a laboratory.

Answer:

D. There are fewer variables to control.