User talk:Hello9879

October 2016
Hello, I'm Serols. I wanted to let you know that I reverted one of your recent contributions —the one you made with this edit to Structure of the Earth— because it did not appear constructive. If you would like to experiment, please use the sandbox. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thanks. Serols (talk) 15:31, 3 October 2016 (UTC)