Because there is no way to know what effects the other key variables are having on outcome. So, there is no way to evaluate any one variable, or its effects on outcome.
The dependent variable does.
In order for the results to be valid, the dependent variable can only be affected by the independent variable, so somethings need to be kept CONSTANT. The things that need to be kept constant are called CONTROLLED VARIABLES. Even if controlled variables are affecting the dependent variable(s), which they usually do, keeping them constant will ensure that all trials of an investigation were equally impacted by the controlled variables, therefore allowing one to see the impact of an independent variable on the dependent variable. All in all, a 'constant' in a science experiment should actually be called a 'controlled variable' and the description of such a variable is described in the third point. Hope this clarifies.
The controlled variable is the one that you chose to change while the dependant is the variable that changes because it is effected by the controlled variable
time or length could be two different variables depending in what the investigation was based on
In an investigation, the three primary variables are independent variables, dependent variables, and controlled variables. The independent variable is the factor that is manipulated or changed to observe its effects. The dependent variable is the outcome or response that is measured to determine the impact of the independent variable. Controlled variables are the conditions kept constant throughout the investigation to ensure that any changes in the dependent variable are solely due to the manipulation of the independent variable.
Because there is no way to know what effects the other key variables are having on outcome. So, there is no way to evaluate any one variable, or its effects on outcome.
In an investigation, the three types of variables are independent, dependent, and controlled variables. The independent variable is the one that is manipulated or changed by the researcher to observe its effect. The dependent variable is the outcome that is measured to see if it is influenced by changes in the independent variable. Controlled variables are constants that are kept the same throughout the experiment to ensure that the results are due to the independent variable alone.
You establish a controlled variable from which you can compare your results from your experimental variables.
A controlled investigation is an experiment where one variable is manipulated (independent variable) to observe its effect on another variable (dependent variable), while controlling for and monitoring other variables to ensure they do not influence the results. This helps to establish causal relationships between variables and reduce the impact of confounding factors on the results.
The variables that are kept the same in an investigation are called "controlled variables" or "constants." These variables are maintained at the same level to ensure that any observed changes in the dependent variable can be attributed solely to the manipulation of the independent variable. By controlling these variables, researchers can enhance the reliability and validity of their experimental results.
In a simple controlled investigation, there is typically only one independent variable that is intentionally manipulated by the researcher. This allows for evaluating the effect of that variable on the dependent variable while keeping other factors constant.
The independent variable in this investigation is the factor that is manipulated or changed deliberately by the researcher to observe its effects. The dependent variable is what is measured or observed in response to the changes made to the independent variable. Other variables, known as controlled or constant variables, are kept the same to ensure that any observed effects are due to the manipulation of the independent variable. In summary, the investigation compares the effects of the independent variable on the dependent variable while controlling other factors.
A controlled experiment. In a controlled experiment, all variables apart from the independent variable are kept constant to accurately determine the effect of the independent variable on the dependent variable. This helps ensure that any observed changes are due to the manipulated variable and not other factors.
In scientific investigations, three key types of variables are independent variables, dependent variables, and controlled variables. The independent variable is the factor that is manipulated or changed by the researcher to observe its effect. The dependent variable is the outcome or response that is measured to assess the impact of the independent variable. Controlled variables are those that are kept constant throughout the experiment to ensure that any observed changes can be attributed solely to the independent variable.
The dependent variable does.
dependent variable