Question

C. A controlled experiment is an experiment in which only one variable is changed at

Answer 1

Answer:

So the independent is what you keep the same. You must keep the experament controlled because if you have more than one variable there is the chance that you will not know what factor changed the experament.

Ex: If you are trying to find out the height of a plant based on what you add to the soil and you give it plant A water, plant B soda, and plant C milk, AND you stick plant A and B in the shade and stick plant C in the sun you will never know what affected the hight of the plant due to the different variables.

Answer 2

Conducting a controlled experiment is necessary to determine how a variable affects seed germination rates because it decreases the chances of other factors impacting the dependent variable. Only changing one variable at a time and keeping the others controlled allows the experimenter to accurately identify the effects of that one independent variable.