User talk:73.120.108.187

Hello and welcome to Wikipedia. Constructive contributions to Wikipedia are appreciated, but a recent edit of yours to the page Conservation of mass has an edit summary that appears to be inaccurate or inappropriate. The summaries are helpful to people browsing an article's history, so it is important that you use edit summaries that accurately tell other editors what you did. Feel free to use the sandbox to make test edits. Thank you. - DVdm (talk) 20:40, 30 October 2020 (UTC)