There are many variables in an experiment. Which variable should you only have one of in each experiment
A) controlled variable
B) independent variable
C) dependent variable
Is B the right answer?
yes it is correct
Thank you!^^
The variable that should only have one in each experiment is the independent variable, which is option B.
To understand this concept, let's first define the terms:
1. Independent variable: This is the variable that is deliberately manipulated or changed by the experimenter. It is the variable that is hypothesized to have an effect on the dependent variable.
2. Controlled variable: These are the variables that are kept constant or unaltered throughout the experiment to ensure that they do not influence the outcome.
3. Dependent variable: This is the variable that is measured or observed to determine the effect of the independent variable.
In an experiment, the independent variable is the variable being tested or changed by the researcher. It should only have one value or level in each experiment. By changing the independent variable, we can observe its effect on the dependent variable.
For example, if you are investigating the effect of temperature on plant growth, the independent variable would be the temperature. You would set up several groups, each exposed to different temperatures (e.g., 20°C, 25°C, 30°C, etc.), but only test one temperature per group.
On the other hand, controlled variables (option A) should remain constant across all groups of the experiment. These variables are crucial for ensuring that any differences observed in the dependent variable are solely due to the independent variable. By keeping the controlled variables consistent, any variations in the dependent variable can be attributed to changes in the independent variable.
Finally, the dependent variable (option C) is the variable that is measured or observed to see how it responds to the changes in the independent variable.
In conclusion, while an experiment can have multiple controlled variables, it should have only one independent variable, as it is the specific factor being tested and manipulated.