What happens to the total mass of a substance undergoing a physical change?
it stays the same.
it doubles.
it triples.
it is reduced.

I think that your answer would be A. because matter never just goes away in any situation, even if it gets away from you.

There is no graph to look at on here, but i shall explain them to you. a line graph is just in its title it’s a graph with a line running through the dots to show an increase or decrease. a bar graph is used to show how much or how little something is so a comparison. a scatter plot is used to graph points to tell the data. and i don’t know what a histogram is.