Bihar Board Class 10 Science Syllabus
Bihar Board Class 10 Science Syllabus

Bihar School Examination Board (BSEB) has been regularly updating the syllabus of all the subjects in Class 10 as it is considered a crucial phase in a student’s academic career. Sincere and dedicated studies help students to prepare well for the Class 10 Board examinations.

Considering this factor, we are providing a detailed summary of Bihar School Examination Board Class 10 Science Syllabus in this article.


A comprehensive understanding of the syllabus will surely help students to come up with an effective time-table for the exam and cover all the chapters within a reasonable amount of time. Furthermore, it is important to revise the chapters multiple times before exam to score good marks.

BSEB has distributed the Science subject into two papers. One is a theoretical paper, while the other is a practical paper.

Paper – I is a theory paper carrying a total of 80 marks with a 3-hour time limit.

Paper – II is a sessional test/assessment worth 20 marks.



Theory Syllabus of Bihar Board Class 10 Science


The following is the unit-wise and chapter-wise syllabus of Class 10 Science (along with marks-distribution) which includes several topics that help form a strong foundation for the next class and further higher studies:


Unit Name


Unit 1: Chemical Compounds


Unit 2: The Living World


Unit 3: How things work


Unit 4: Natural Phenomena


Unit 5: Natural Resource








Chapter 1 – Chemical Reactions and Equations


Chapter 2 – Acids Bases and Salt


Chapter 3 – Metals and Non-Metals


Chapter 4 – Carbon and its Compounds


Chapter 5 – Periodic Classification of Elements


Chapter 6 – Life Process


Chapter 7 – Control and Coordination


Chapter 8 – How do Organisms Reproduce?


Chapter 9 – Heredity and Evolution


Chapter 10 – Light- Reflection and Refraction


Chapter 11 – The Human Eye and The Colorful World


Chapter 12 – Electricity


Chapter 13 – Magnetic Effects of Electric Current


Chapter 14 – Sources of Energy


Chapter 15 – Our Environment


Chapter 16 – Sustainable Management of Natural Resources



The difficulty level and the amount of time required to cover each unit and the respective chapter varies. Therefore, students must try to revise their basics well before going ahead with the new chapters while studying for the exam.



The next step would be to prioritize the chapters according to their weightage of marks. Each unit in the BSEB Class 10 Science Syllabus 2021 has been assigned with appropriate marks.


BSEB Class 10 Science Practical/Sessional Exam


The internal assessment exam/sessional test for Class 10 Science is of 20 marks. Generally, the marks for internal assessment are distributed as follows:

–> 5 Marks for Attendance (for 90% Attendance)

–> 5 Marks for Extra-Curricular Activities

–> 10 Marks for Mock Test / Assignment

The assignment or the project work performed for the internal assessment is evaluated by an internal subject teacher and an external examiner. Both the internal and the external examiner give marks to the students.




Frequently Asked Questions for BSEB Class 10 Science:


Q1. How are the marks for the BSEB Class 10 Science divided?


Ans: The total marks allotted for the BSEB class 10 science are 100 marks. These marks are divided between theory paper (80 marks) and sessional exam (20 marks).


Q2. Which unit has the highest weightage for the class 10 science syllabus?

Ans: For the Bihar Board class 10 science syllabus, the units with the highest weightage are Human bodies and Activities, Substances and reactions, and Physical Events.


Q3. When will the sessional exams be held?

Ans: The dates for internal assessment exams will be declared by your school authorities. Students are advised to contact their school exam department for further information.



Q4. Will the syllabus be reduced for the academic session 2021-22 as well?

Ans: Keeping in mind the Covid-19 restrictions, the BSEB had reduced the syllabus for all the subjects for the academic year 2020-21 for the convenience of students. However, no such announcement has been made for the academic session 2021-22. Students are advised to keep visiting the official website of the BSEB –  to stay updated.


Q5. Why is it critical to know the exam’s syllabus ahead of time?


Ans. Knowing the syllabus ahead of time allows students to have a better understanding of the topics, leading to confidence during the exam. It also helps students to improve their time management skills.


We hope that this article about BSEB Class 10 Science Syllabus has been beneficial to students in planning their studies. Being well-versed with the syllabus will also assist them in making an effective study plan for the exam.