Table of Contents▼
- Available Chapters
- About Class 10 Science
- Key Highlights
- CBSE Class 10 Science: Official Curriculum & Course Structure (2025–26)
- CBSE Class 10 Science: Complete Practical Syllabus (2025–26)
- CBSE Class 10 Science: Marks Weightage & Blueprint (2025–26)
- CBSE Class 10 Science: Recommended Reference Books & Materials
Available Chapters
The chapter list below for Science in Class 10 helps students move directly to the topic they want instead of browsing unrelated material.
- Acid Bases and Salts
- Carbon and Its Compounds
- Chemical Reactions and Equations
- Control and Coordination
- Electricity
- Life Processes
- Magnetic Effect of Electric Current
About Class 10 Science
Science is a 100-mark subject in CBSE boards, combining theory and internal assessment. It plays a major role in overall percentage and is especially important for students planning to take Science stream in Class 11. The concepts studied here form the base of Physics, Chemistry, and Biology, making it important not just for boards but also for future studies.
Science becomes a high-scoring subject when preparation is focused and exam-oriented. Students who revise NCERT properly, practice diagrams, and solve PYQs regularly tend to score better. Board exams reward clarity, correct terminology, and structured answers rather than long explanations. Many students read Science like a theory subject without practising written answers. Some rely only on short notes or video summaries without revising NCERT properly. Ignoring diagrams, chemical reactions, and repeated PYQ patterns is another major mistake that leads to loss of marks.
Key Highlights
- 100-mark subject with strong scoring potential
- NCERT is the most important source for board exams
- PYQs reveal repeated question patterns
- Diagrams and reactions carry direct marks
- Concept clarity is more important than long answers
- Balanced preparation makes the paper easy to handle
CBSE Class 10 Science: Official Curriculum & Course Structure (2025–26)
Most Class 10 students make the huge mistake of treating Science as a subject where you can just memorize long definitions from the textbook and score full marks, but the reality of the board examination is completely different and strictly application-based. Here is the exact unit-wise course structure you need to follow for this session.
| Unit | Theme / Title | Chapters & Key Topics |
|---|---|---|
| Unit I | Chemical Substances | Chemical Reactions & Equations, Acids, Bases & Salts, Metals & Non-metals, Carbon & Its Compounds |
| Unit II | World of Living | Life Processes, Control & Coordination, Reproduction, Heredity & Evolution |
| Unit III | Natural Phenomena | Reflection & Refraction of light, The human eye & vision defects, Prisms, dispersion & scattering of light |
| Unit IV | Effects of Current | Electric current, Ohm’s law, Resistance, Heating effect, Power, Magnetic effects of current, Domestic circuits |
| Unit V | Natural Resources | Environment & ecosystem, Ozone depletion, Waste management, Biodegradable & non-biodegradable substances |
For Unit I (Chemical Substances), stop reading it like a novel and focus heavily on balancing equations and IUPAC names because examiners love asking twisted questions from Carbon and its Compounds. In Biology, if you don't practice drawing well-labeled diagrams of the human heart or brain, you will unnecessarily lose marks in 5-mark long questions. Physics is purely numerical and diagram-based, so repeatedly practice your ray diagrams and Ohm's Law formulas to easily secure those top scores without going blank in the exam hall.
CBSE Class 10 Science: Complete Practical Syllabus (2025–26)
A massive psychological fear among students is the practical exam, where many think they will lose marks if their experiment reading doesn't match the textbook perfectly, but examiners actually judge your procedural clarity and basic lab etiquette. The curriculum strictly mandates 14 core experiments spanning Physics, Chemistry, and Biology.
| Group A: Chemistry & Biology Experiments (Units I & II) | ||
|---|---|---|
| Exp. No. | Practical Activity | Unit |
| 1A | Finding pH of samples (HCl, NaOH, Ethanoic acid, Lemon juice, Water, NaHCO3) | I |
| 1B | Properties of acids & bases (HCl, NaOH) with litmus, Zinc, and Sodium carbonate | I |
| 2 | Types of reactions (Combination, Decomposition, Displacement, Double Displacement) | I |
| 3 | Action of Zn, Fe, Cu, Al on salt solutions; determine reactivity order | I |
| 8 | Properties of Acetic Acid (Odour, solubility, litmus, reaction with NaHCO3) | I |
| 9 | Comparative cleaning capacity of soap in soft and hard water | I |
| 6 | Prepare temporary mount of leaf peel (stomata) | II |
| 7 | Demonstrate that CO2 is released during respiration | II |
| 12 | Study binary fission (Amoeba) and budding (Yeast/Hydra) using permanent slides | II |
| 14 | Identify different parts of a Dicot seed (Pea, Gram, or Kidney Bean) | II |
| Group B: Physics Experiments (Units III & IV) | ||
|---|---|---|
| Exp. No. | Practical Activity | Unit |
| 4 | Study dependence of Potential Difference (V) on Current (I); plot V-I graph | IV |
| 5 | Determine equivalent resistance of two resistors connected in series and parallel | IV |
| 10 | Determine focal length of a concave mirror and a convex lens | III |
| 11 | Trace light path through a rectangular glass slab (find ∠i, ∠r, ∠e) | III |
| 13 | Trace the path of light through a glass prism | III |
The ground reality is that your school wants you to score that full 20/20 in internals just as much as you do to maintain their overall board passing percentage banners. To succeed, just keep your observation notebooks updated and get them signed by your subject teachers regularly throughout the year. During the viva voce, external teachers rarely ask complex derivations; they simply ask for the core aim of the experiment, basic safety precautions, and simple logical questions like why you used a specific chemical, so focus on the basics instead of panicking.
CBSE Class 10 Science: Marks Weightage & Blueprint (2025–26)
The biggest reason why hard-working students score low in board exams is that they spend weeks studying chapters that barely carry any weightage, completely ignoring the official blueprint. Understanding this exact marks distribution is your ultimate cheat code to study smartly and prevent wasting hours on low-yield topics.
| Unit No. | Unit Title | Marks Weightage |
|---|---|---|
| Unit I | Chemical Substances—Nature and Behaviour | 25 Marks |
| Unit II | World of Living | 25 Marks |
| Unit III | Natural Phenomena | 12 Marks |
| Unit IV | Effects of Current | 13 Marks |
| Unit V | Natural Resources | 05 Marks |
| Theory Paper Total | 80 Marks | |
| Internal Assessment | 20 Marks | |
| Grand Total | 100 Marks |
If you look closely at the data, Chemical Substances and the World of Living form the absolute backbone of your result, carrying a massive 50 marks together. Mastery of just these two units gives you an incredible safety net. On the other hand, Physics (Units III and IV) provides a 25-mark edge purely based on objective numericals, where step-marking can easily save you even if your final calculation is wrong. Never ignore Unit V (Natural Resources); it is only worth 5 marks, but it takes barely two hours to prepare and guarantees free marks that instantly boost your overall percentage.
CBSE Class 10 Science: Recommended Reference Books & Materials
You will see your classmates buying piles of thick, expensive reference books thinking it will guarantee a 95+ score, but board examiners strictly create the question paper using only the exact lines and back exercises of the NCERT textbook. These official supplementary resources are truly all you need for deep conceptual clarity and practice.
| Sl. No. | Book Title | Publisher |
|---|---|---|
| 1 | Science – Textbook | NCERT |
| 2 | Assessment of Practical Skills in Science | CBSE |
| 3 | Laboratory Manual – Science | NCERT |
| 4 | Exemplar Problems | NCERT |
Treat your main NCERT Science Textbook as your absolute bible, but if you truly want to test your higher-order thinking skills (HOTS) and prepare for those twisted competency-based questions, the NCERT Exemplar is your best friend. Furthermore, do not waste your money on bulky private guides when the official CBSE Laboratory Manual has all the exact viva questions and procedural steps you need to confidently secure your 20 internal marks without breaking a sweat.