a control and a variable
environmental
yes, he discovered electrons.
An experiment consists of the independent variable, which is the variable that the researcher manipulates, and the dependent variable, which is the variable that is measured and observed in response to the independent variable.
The controlled parts of a controlled experiment are the variables that are kept constant or unchanged throughout the course of the experiment. These include factors such as temperature, time, lighting, and any other conditions that could potentially affect the outcome of the experiment. Controlling these variables helps to ensure that any changes observed in the experiment are a result of the manipulated variable being tested.
The parts of an experiment that stay the same.
hypothesis,procedure,data
i think that independent variable
Correlation
observation, hypothsis, experimentation. and conclustion
In an experiment, the parts that are kept the same are known as constants or controlled variables. These are the factors that are intentionally kept unchanged throughout the experiment to ensure that any observed changes in the results are caused by the independent variable being tested.
correlation
You have to have either done two experiments or read two experiments or read one experiment and do the other in order to compare and contrast an experiment.