The syllabus for Class 10 CBSE Science for the year 2023 is divided into two parts: theory and practical. The theory part covers topics related to Physics, Chemistry, and Biology. The detailed syllabus is as follows:

Physics:
1. Light - Reflection and Refraction
2. Human Eye and Colourful World
3. Electricity
4. Magnetic Effects of Electric Current
5. Sources of Energy

Chemistry:
1. Chemical Reactions and Equations
2. Acids, Bases and Salts
3. Metals and Non-metals
4. Carbon and its Compounds
5. Periodic Classification of Elements

Biology:
1. Life Processes
2. Control and Coordination
3. How do Organisms Reproduce?
4. Heredity and Evolution
5. Our Environment
6. Management of Natural Resources

Practical:
1. Experiments based on Physics concepts such as refraction, electricity, and magnetism
2. Experiments based on Chemistry concepts such as acids, bases, metals and non-metals, and carbon compounds
3. Experiments based on Biology concepts such as life processes, control and coordination, and reproduction.

The practical examination will be conducted by the school itself and will carry a weightage of 20 marks. The theory examination will be conducted by CBSE and will carry a weightage of 80 marks.

It is important for students to study the entire syllabus thoroughly to score well in the examination. Students can refer to NCERT textbooks and practice papers to prepare for the examination. They should also focus on developing conceptual clarity and problem-solving skills to perform well in the examination.