Today, we first worked on space science. I used some of James's knowledge of chemistry to talk about how fusion in stars causes heavier elements in the universe to form. James and I also discussed the impacts of the moon and sun on the tides. Next, we discussed how algebraic expression with two variables such as x and y can be solved with exactly two equations James used isolating a variable in the first equation and substitution of the isolated variable into the second equation we worked on numerous practice problems.