one limitation is a very small data set (it's hard to tell if the result is going to be different next time). Which brings up the subject of variability - are the initial conditions always the same (will my beaker be a little dirty or contaminated next time, will my lab partner click the stopwatch at exactly the same time, will I be distracted at the end of the experiment and miss an important detail...).
A good experiment is repeatable, a bad one gets different results each time.
A valid one. An experiment cannot conclusively prove anything if more than one independent variable is altered at a time. That being said, many dependent variables could show change and the experiment would still be valid, as long as only one independent variable was altered at a time. An experiment that changes only one variable at a time is called a controlled experiment.
this is an experiment that only one varible is manipulated at a time
It is important to only change one variable at a time when doing an experiment, because if you change more than one, there will be uncertainty as to which one affected the result.
A controlled experiment
It depends on the experiment. Normally only one is tested at a time because they can affect the experiment. Variables are tested in a controlled experiment to see whether they affect the outcome and also how.
Limitations in plant experiment entail the lack of one or all of the following: light, water, temperature and nutrients
Psychologist Solomon Asch conducted the classic experiment on conformity and peer pressure which involved six confederates and one real participant viewing lines of different lengths to see if the participant would conform to incorrect answers given by the confederates. The study revealed the strong influence of group pressure on individual behavior.
The Geiger-Marsden experiment, which is also called the gold foil experiment or the Rutherford experiment, was conducted by Hans Geiger and Ernest Marsden in 1909, under Earnest Rutherford's direction. You need a link to the Wikipedia post on this ground-breaking experiment, and we've got one for you.
Controlled Experiment :]
Controlled Experiment :Pcontrolled experiment.
Controlled Experiment :Pcontrolled experiment.
Environmental factors if you cannot control them.Variable factors if you can control them.See link below for easy explanation:In an experiment the scientist is able to change the independent variable. To insure a fair test, a good experiment has only one independent variable. As the scientist changes the independent variable, he or she observes what happens. - See more at: http://www.chacha.com/question/what-part-of-an-experiment-is-the-factor-that-you-change#sthash.iyH25Jac.dpufIn an experiment the scientist is able to change the independent variable. To insure a fair test, a good experiment has only one independent variable. As the scientist changes the independent variable, he or she observes what happens. - See more at: http://www.chacha.com/question/what-part-of-an-experiment-is-the-factor-that-you-change#sthash.iyH25Jac.dpuf
a controlled experiment
a controlled experiment
a controlled experiment
Controlled experiment
this is an experiment that only one varible is manipulated at a time