Question

10 a well designed experiment requires a _____.
hypothesis
measurement
procedure
control

Explanation:

A well - designed experiment requires a control. A control is a group or condition in an experiment that serves as a baseline for comparison. Without a control, it is difficult to determine if the changes observed in the experimental group are due to the variable being tested or other factors. While a hypothesis (a proposed explanation), measurement (to quantify results), and procedure (the steps of the experiment) are also important, the control is crucial for the validity of the experiment.

Answer:

control