The Purpose in an experiment is Basically your question
you have an experiment to test your thoeries, what u think is going to happen.
for example,
u think that if u shake a bottle of fizzy drink, then it will burst out when u open it,this is the prediction or theory
u then try it, this is your experiment or method
next u find out that it is right and u write down what happened and why it happened, this is your evaluation or conclusion.
A variable represents either a known or unknown thing. They use it when they need to use math. It is the easiest way to mark an unknown object or sum. When you talk about variables from an experiment; they simply are things that change in the experiment. No offense to you or anything but that question is like asking: "why do we use money?" or "why do we use the numbers we use?" it's a lame question for a midterm.
With controlled experiments it is taken into consideration what possible variables there could be and it is taken into account when conducting the experiment. This would mean that controlled experiments would produce more valid data.
The number of dependent variables in an experiment varies, but there is often more than one. experiments also have controlled variables are quantities that a scientist wants to remain constant, and he must be observe them as carefully as the dependent variables.
In a properly designed experiment, it is important to have at least 2 controlled variables. With two variables you are able to remove one at a time and see the effect in your setup.
no the variables cant be controlled.
It can have as many as it needs. You can even change different variables at the same time and study their individual influence with proper statistical tools in many type of experiments.
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With controlled experiments it is taken into consideration what possible variables there could be and it is taken into account when conducting the experiment. This would mean that controlled experiments would produce more valid data.
The number of dependent variables in an experiment varies, but there is often more than one. experiments also have controlled variables are quantities that a scientist wants to remain constant, and he must be observe them as carefully as the dependent variables.
In experiments, variables are factors that can be changed, controlled, or measured to observe their effect on the outcome. There are independent variables that are manipulated by the researcher, and dependent variables that are the outcome or response being measured. It is important to carefully define and control variables to ensure accurate and reliable results in experiments.
it is difficult to control all variables except the one being tested
Scientists use controlled experiments because they allow for precise control of extraneous and independent variables. This allows a cause-and-effect relationship to be established. Controlled experiments also follow a standardized step-by-step procedure.
In a properly designed experiment, it is important to have at least 2 controlled variables. With two variables you are able to remove one at a time and see the effect in your setup.
it is difficult to control all variables except the one being tested
it is difficult to control all variables except the one being tested
Controlled variables are things that must be controlled and kept the same during the experiments in order to prevent them from having an impact on results.
In biology, a variable is any factor or condition that can change or be controlled in an experiment. Variables can be independent (the factor being tested), dependent (the outcome being measured), or controlled (kept constant for comparison). Understanding and controlling variables is critical for designing valid experiments and drawing accurate conclusions.