CBSE Class 10 Science Syllabus & Topic-Wise Weightage 2023

CBSE Class 10 Science Syllabus: The Central Board of Secondary Education has recently released the revised CBSE Class 10 Syllabus 2023 on its official website. There will be no term-wise examination conducted by the Board. Instead, there will be only one Year End Exam from the A.Y. 2022-23 onwards. Moreover, the Board has decided to continue with the 30% reduction of the syllabus from the previous trend with no other major changes. The CBSE Class 10 Science Syllabus 2023 comprises 5 units namely Chemical Substances-Nature and Behaviour, World of Living, Natural Phenomena, Effects of Current, and Natural Resources.

Before the introduction of the CBSE Class 10 time table for exams in 2023, students should begin studying the CBSE 10th Science syllabus for the academic years 2023. CBSE Class 10 Science paper will be for a total of 80 marks with 20 marks of Internal Assessment. In addition to this, CBSE Class 10 Syllabus also includes a list of Practicals to be performed. The CBSE Class 10 examination will be held from February 15 to March 21, 2023. Students appearing for CBSE Class 10 Science, must go through the whole article to know about the CBSE Class 10th Science Syllabus, Exam Pattern, and Preparation Tips.

CBSE Class 10 Science Course Structure 2023

CBSE Class 10 Science Syllabus 2023 - Unit-wise

Unit 1: Chemical Substances – Nature and Behaviour

Unit II: World of Living

Unit III: Natural Phenomena

Unit IV: Effects of Current

Unit V: Natural Resources

Our environment: Eco-system, Environmental problems, Ozone depletion, waste production and their solutions. Biodegradable and non-biodegradable substances.

CBSE Class 10 Science Question Paper Design (Theory)

CBSE Class 10 Exam pattern for Science is designed to examine the students on 3 parameters as shown below along with the Typology of the Questions asked in CBSE Class 10 Science Exam.

Types of Questions Asked

• Very Short Answer (VSA) - objective type questions, 
• Assertion – Reasoning type questions; 
• Short Answer & Long Answer; 
• Source-based/ Case-based/ Passage-based/ Integrated assessment questions.

The CBSE 10th Science Syllabus covers the following assessment areas.

Internal Assessment (20 Marks)  

(i) Periodic Assessment - 05 marks + 05 marks

(ii) Subject Enrichment (Practical Work) - 05 marks

(iii) Portfolio - 05 marks

CBSE Class 10 Science Syllabus 2023 for Practical Exams

Students should not underrate the significance of practicals because the internal assessment is worth a total of 20 marks. They should concentrate on the practicals as well as the theory covered by the CBSE Syllabus for Class 10 Science. This will assist students in receiving excellent scores and gaining an understanding of the theoretical topics through experiments and practicals. The CBSE Class 10 Science Practical syllabus is therefore available here.

CBSE Class 10 Science Practical Syllabus

1. A. Finding the pH of the following samples by using pH paper/universal indicator: Unit-I
(i) Dilute Hydrochloric Acid
(ii) Dilute NaOH solution
(iii) Dilute Ethanoic Acid solution
(iv) Lemon juice
(v) Water
(vi) Dilute Hydrogen Carbonate solution

B. Studying the properties of acids and bases (HCl & NaOH) on the basis of their reaction with:

• Litmus solution (Blue/Red)
• Zinc metal
• Solid sodium carbonate

2. Performing and observing the following reactions and classifying them into:

A. Combination reaction
B. Decomposition reaction
C. Displacement reaction
D. Double displacement reaction

i) Action of water on quicklime
ii) Action of heat on ferrous sulphate crystals
iii) Iron nails kept in copper sulphate solution
iv) Reaction between sodium sulphate and barium chloride solutions

3. A. Observing the action of Zn, Fe, Cu and Al metals on the following salt solutions:

• ZnSO₄(aq)
• FeSO₄(aq)
• CuSO₄(aq)
• Al₂(SO₄)₃(aq)

B. Arranging Zn, Fe, Cu and Al (metals) in the decreasing order of reactivity based on the above result.

4. Studying the dependence of potential difference (V) across a resistor on the current (I) passing through it and determine its resistance. Also plotting a graph between V and I.

5. Determination of the focal length of (i) Concave mirror and (ii) Convex lens by obtaining the image of a distant object.

6. Preparing a temporary mount of a leaf peel to show stomata.

7. Experimentally show that carbon dioxide is given out during respiration.

8. Study of the following properties of acetic acid (ethanoic acid)

i) Odour
ii) solubility in water
iii) effect on litmus
iv) reaction with Sodium Hydrogen Carbonate

9. Study of the comparative cleaning capacity of a sample of soap in soft and hard water.

10. Determination of the focal length of:
i) Concave mirror
ii) Convex lens
by obtaining the image of a distant object.

11. Determining the ray of light's path as it travels through a rectangular glass slab at various angles of incidence. Calculate the angles of incidence, refraction, and emergence, then analyse the results.

12. Using prepared slides, research binary fission in amoebas and budding in yeast and hydra.

13. Following the course of light rays as they pass through a glass prism.

14. Differentiating the components of a dicot seed embryo (Pea, gramme or red kidney bean).

Reference Books for CBSE Class 10 Science Syllabus 2023

• Science-Text book for class X- NCERT Publication
• Assessment of Practical Skills in Science- Class X- CBSE Publication
• Laboratory Manual-Science-Class X, NCERT Publication
• Exemplar Problems Class X – NCERT Publication

CBSE 10 Science Syllabus 2023: Preparation Tips 

• Be clear about the Basic Concepts: Science is based on Theories, Concepts and Formulae. In order to perform well in the CBSE Class 10th Science exam, one must have a clear understanding of the underlying principles and concepts.
• Proper Learning Process: One cannot muggle up science. Rather try to learn the concepts with examples and applications. Read and understand the underlying theory for every concept. Read, comprehend and then derive formulae on your own. After that solve problems based on them, this way you will never have to memorize every formula.
• Study Everyday: Make a habit of studying for even a small period of time everyday. This will help you acquire better results. If you maintain a consistency in studying everyday, you will get to revise your topics and avoid last minute cramming through them.
• Solve Question Papers: There is no alternative to practice sample papers. Like mathematics, Science also requires consistent practice to brush up the skills and concepts. Practice solving textbook examples, Previous-Year Question Papers, sample papers.
• Time Management: In order to acquire a considerable marks in the CBSE Class 10 Science Exam, students must know how to manage their time. To cover the vast syllabus and then attempting the entire question paper in the given time, requires a good hold on time management. Based on your domain of expertise, plan your routine during exam week. Plan how you will attempt the questions and proceed accordingly.