WikiAnswers cannot read your mind to know what you thought. This is an opinion question that your teacher just wanted to see if you were paying attention. Evidently not.
the experiment result would be confusing
An experiment must have a control to show what would happen if no factors were changed.
That would depend almost entirely on the experiment being carried out
the experiment will dupliucate.
If it was not identified then you would not know what to change or what stays the same.
The model is what you think will happen, the experiment is what actually does happen.
What experiment?
youu want to know whether what you guessed would happen was right and if it wasn't then what happened
That the plants would be dead
then you would get a girlfriend instead of asking questions on wikianswers
What is going to happen when you repeat this experiment on self D.C generator?
A minor chemical reaction will occur. It is a very fun experiment to do with children.