Marking Scheme of CBSE 2023 Class 10 Science Exam:

The Central Board of Secondary Education (CBSE) follows a specific marking scheme for the Class 10 Science exam. The marking scheme is designed to assess the students' knowledge, understanding, and application of scientific concepts and principles. Let's break down the marking scheme into different sections and their corresponding weightage.

I. Theory Exam:
The theory exam consists of a total of 80 marks. The marking scheme for theory questions is as follows:

1. Very Short Answer Type Questions (VSAQ):
- Weightage: 1 mark each
- Approximately 6-8 questions
- Total marks: 6-8 marks

2. Short Answer Type Questions (SAQ):
- Weightage: 2 marks each
- Approximately 8-10 questions
- Total marks: 16-20 marks

3. Long Answer Type Questions (LAQ):
- Weightage: 3 marks each
- Approximately 10-12 questions
- Total marks: 30-36 marks

4. Essay Type Questions (ETQ):
- Weightage: 5 marks each
- Approximately 4-6 questions
- Total marks: 20-30 marks

II. Practical Exam:
The practical exam consists of a total of 20 marks. The marking scheme for practical questions is as follows:

1. Practical Record Book:
- Weightage: 5 marks
- Assessment of practical record book including experiments, activities, observations, and inferences.

2. Lab Practical:
- Weightage: 5 marks
- Performance in the laboratory while conducting experiments, handling apparatus, and recording observations.

3. Viva Voce:
- Weightage: 5 marks
- Oral questioning to assess conceptual understanding, reasoning, and in-depth knowledge related to practical experiments.

4. Project Work:
- Weightage: 5 marks
- Assessment of project work, including presentation, creativity, research, and understanding of scientific concepts.

III. Internal Assessment:
The internal assessment carries a weightage of 20 marks. It includes activities such as practical work, projects, assignments, group discussions, and class participation.

IV. Overall Evaluation:
The final evaluation of the student's performance in the Science exam is done by combining the marks obtained in the theory exam, practical exam, and internal assessment.

It's important for students to thoroughly understand the concepts, practice solving different types of questions, and perform well in both theory and practical exams to secure good marks in the Class 10 Science exam.