Multiple Choice
Why is it important to include a negative control in an experiment?
4. BONUS: Lab Techniques and Procedures
Experimental Error
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In an experiment, which variable is manipulated by the experimenter?
A
Independent variable
B
Dependent variable
C
Controlled variable
D
Extraneous variable
Verified step by step guidance1
Understand the definition of each type of variable: The independent variable is the one that is changed or controlled by the experimenter to test its effects on the dependent variable.
Recognize that the dependent variable is what you measure in the experiment and what is affected during the experiment.
Identify the controlled variables as those that are kept constant to ensure that the effect on the dependent variable is due to the manipulation of the independent variable.
Extraneous variables are any variables that you are not intentionally studying in your experiment, which could affect the results if not controlled.
Conclude that the independent variable is the one manipulated by the experimenter to observe its effect on the dependent variable.
Related Videos
Related Practice
Experimental Error practice set
Problem sets built by lead tutorsExpert video explanations