What makes a controlled experiment different from others?

Answer:

A controlled experiment is different from others since it has the same amount of things except for only one variable. For example of a controlled experiment, If you have two plants and you want to see if it will grown better in sunlight or in darkness. So you put on in the closet and put the other one in a open window. You water and give both of them the same amount of soil, water, ferterizer. Except for the one variable which in this case is sunlight.