Q:

What is a control in an experiment?

A:

A control in an experiment typically refers to the control group, which is the group that is not being exposed to the element or factor being tested. The other group is the experiment group. The only difference between the two groups should be the experiment factor.

According to About.com, controlled experiments have several strengths and weaknesses. One of the strengths of having a control group is that it allows causation to be established. It also singles out individual determinative factors since all other factors are constant. However, controlled experiments tend to be artificial; that is, they are typically done in a laboratory and do not account for many natural responses. Therefore, controlled experiments need to be evaluated in order to determine the extent to which the artificial setting has influenced the outcome.


Is this answer helpful?

Similar Questions

  • Q:

    What is a "control" in an experiment?

    A:

    Experimental controls are mechanisms in science that eliminate extraneous factors that might otherwise affect the results of an experiment. By creating a second set that is unaffected by the phenomenon being measured, scientists are able to isolate the phenomenon by contrasting the test group with the control group.

    Full Answer >
    Filed Under:
  • Q:

    What is it called when scientists do their experiment more than once?

    A:

    When a scientist repeats an experiment more than once, it is called replication. The goal is to create an experiment that can be repeated multiple times and yield the same or similar results, regardless of whether it is the same scientist performing the experiment.

    Full Answer >
    Filed Under:
  • Q:

    What is a clamp holder used for in a lab?

    A:

    The clamp holder is used in conjunction with several other lab pieces to hold a container of any given substance during an experiment that often involves heating the substance. It is attached to the rod of the ring stand and is used when the ring lacks a built-in thumbscrew.

    Full Answer >
    Filed Under:
  • Q:

    How does the squeaky pop test work?

    A:

    The squeaky pop test is an experiment to demonstrate the fact that hydrogen gas is created when most metals come in contact with an acid. The experiment begins by placing a metal strip such as magnesium into a test tube of acid.

    Full Answer >
    Filed Under:

Explore