Don't worry, the pressure at the beginning of junior high school should not be too great. Physics is only related to recitation at first, but the gap may widen in the second semester of junior high school (the second semester of junior high school is very important, and success or failure lies here). Physics is related to complex logical judgments and operations in the third year. As for chemistry, there is no problem in memorizing formulas.

In short, it depends on the understanding of the landlord. . . . After all, master led the practice by himself.

If you can't keep up with anything in junior high school mathematics, you can start classes or preview physical chemistry in the summer vacation of junior high school.