I can get new and useful knowledge from the sciences books, so I am interested in sciences in an academic field. Because sciences are divided into many classes, and I can't describe a full classification of sciences with my in being knowledge, therefore I will only describe certain parts of the total classification. Science is classified into pure science and natural science. Pure sciences include mathematics, physics and chemistry, natural sciences include earth sciences and biology, and each science also marks off some relevant fields of study.
Firstly, I describe pure sciences. …
