You should carry forward your preparation of class 10th science exam in the following steps:-
1. Read a particular chapter through NCERT thoroughly.
2. Try solving the in-chapter exercises.
3. Memorize the formulae or equations orally.
4. Try writing those formulae and equations again and again.
5. Make notes of the chapter.
6. Try solving the end chapter exercises.
7. Keep revising your notes again and again to increase your remembering ability. Keep rewriting the formulae and equations also.
8. Be confident during the exam.
I hope this helps you,
Good Luck for your exam