What is the Control, Dependent Variable, and experimental variable in an experiment?

consider an experiment where a researcher want to find the impact of hours of light per day (L) on plant height (H)





experimental variable: what the researcher can change, in this case (L)


dependent variable: what changes as a result of changing the experimental variable, in this case (H)


control: a trial done with a standard value for the experimental variable, in this case it could be a plant exposed to as much light as there is in a typical dayWhat is the Control, Dependent Variable, and experimental variable in an experiment?
You mean controlled variable, controlled variables are the quantities/factors that are held constant or the same.





Dependent variables are the factors that may change as a result of changes made in the independent variable and its value is caused by or depends on the value of the I.V.





Experimental, you mean the independent variable. The independent variable is the one that is intentionally changed/manipulated by the scientist.











Experiment:


PROBLEM: How will the amount of fertilizer used affect plant growth?





HYPOTHESIS: Increased dosages of fertilized will cause greater growth in tomato plants.





INDEPENDENT VARIABLE: The amount of fertilizer used.





CONSTANTS/CONTROLLED VARIABLES:


The seeds must all come from the same package.


All seeds must be planted in the same sized pots with similar soil.


All plants must receive exactly the same amount of water and light.


The temperature should be the same for all test plants.


More than one plant should be used in each test group (in case one type of seed grows better at this time of year than another)





DEPENDENT VARIABLE:


Growth of plant.











Hope this helps :)What is the Control, Dependent Variable, and experimental variable in an experiment?
maybe you can read an these websites, there are definitions, question examples + the answers.





http://www.lhup.edu/sboland/independent_鈥?/a>





http://cnx.org/content/m10802/latest/





or simply read the similar question that already been answered





http://au.answers.yahoo.com/question/ind鈥?/a>