Stem this round was learning about Acid and base. Before we learning deeper into acid and base first we learn about the solution. What is the solution? This is not a means of solving a problem or dealing with a difficult situation solution. This solution is a mixture of two or more substance together. We got to do a lot of activity with it and also reading some article on CK12 to make us get more understand and one of the things is we got to do a PH testing too. At the end of the week, we also play some game to help review the lesson that we learn and we all have fun with it.