What is the independent/dependent variable in my experiment? ****Solved*****

Question

I did an experiment to answer the question "Do living tissues react more like water or more like a buffer?" But I'm having trouble figuring out the independent and dependent variables. Here is the experiment:

 

We poured 25 ml of distilled water into a beaker, recorded its initial pH and then added .1 mL HCI a drop at a time and measured the changing ph from 5,10,15 etc drops. Then we did the same thing with the distilled water but used drops of NaOH. Finally we did the same thing above with drops of HCI and NaOH but instead of distilled water we used a Liver, a Potato, and a Buffer.

 

 

****Solved*****

Answer 1

I like to think of Independent and Dependent variables in this way:

 

Independent variables are something I can change in the experiment.

 

Dependent variables are what is being measured.

 

So try it with this experiment...

 

I want to see if the color of a light has any effect on moths being attracted to that light. The color of the light I use is white, red and blue. The independent variable in this case would be light. Let's say I measure how attracted a moth is to the light by how close they get to the light, and I measure that in millimeters.  Distance would be my dependent variable then.

 

Try that logic with your experiment above and I think it will help :)