Determine the types of data you will gather and the tools of measurement you will use to collect the data to find What can properties of substances tell us about the electrical forces within those substances?

i think it is true since you can test the answer and can use observations to complete it.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).

a corroding iron, if that's one of your choices

catya your not at all which answer i've seen you do this on another question!