CBSE has released the CBSE Class 10 Science Syllabus 2027. The theory paper carries 80 marks, and internal assessment carries 20 marks. Check the unit-wise marks, chapters, exam pattern and PDF link below.
CBSE Class 10 Science Syllabus 2027; PDF DownloadCBSE Class 10 Science Syllabus 2027 : The Central Board of Secondary Education (CBSE) has shared the CBSE Class 10 Science Syllabus 2027. It is for the 2026-27 academic session. Science in 10th Class mixes three subjects in one paper. These are Biology, Chemistry and Physics. The question paper is also split the same way. Section A is Biology and carries 30 marks. Section B is Chemistry and carries 25 marks. Section C is Physics and carries 25 marks. The subject code is 086. The theory paper carries 80 marks, and internal assessment carries 20 marks. These marks are given by the school. The syllabus has five units and 13 chapters for the board exam. A few topics will be checked only in school tests. More board exam updates are on the CBSE 10th page. Below, you will find the PDF link, unit-wise marks, chapter-wise topics, exam pattern, practicals and study tips.
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- CBSE Class 10 Science Syllabus 2026-27 Overview
- CBSE Class 10 Science Syllabus PDF Download
- CBSE Class 10 Science Syllabus 2027: Unit-wise Marks Distribution
- Class 10 Science Syllabus Chapter Wise Topics
- Topics Not in CBSE Class 10 Science Board Exam 2027
- CBSE Class 10 Science Exam Pattern 2027
- CBSE Class 10 Science Question Paper Design 2026-27
- CBSE Class 10 Science Practical Syllabus and Internal Assessment
- How to Download CBSE Class 10 Science Syllabus PDF
- NCERT Books for CBSE Class 10 Science
- Preparation Tips for CBSE Class 10 Science Syllabus 2026-27
CBSE Class 10 Science Syllabus 2026-27 Overview
The table below gives the key details of the Class 10 Science course.
| Item | Details |
|---|---|
| Board Name | Central Board of Secondary Education (CBSE) |
| Class | 10th Class |
| Subject | Science |
| Subject Code | 086 |
| Academic Session | 2026-27 |
| Theory Marks | 80 marks |
| Internal Assessment | 20 marks |
| Total Marks | 100 marks |
| Exam Duration | 3 hours |
| Total Questions | 39 |
| Sections | 3 (Biology, Chemistry, Physics) |
| Units | 5 |
| Chapters in Board Exam | 13 |
| Practical Experiments | 14 |
CBSE Class 10 Science Syllabus PDF Download
The syllabus PDF and other study papers are listed below. Students who want more practice papers can visit the CBSE 10th Question Papers page.
| Document | Session / Year | Status |
|---|---|---|
| Science Syllabus | 2026-27 | |
| Science Sample Paper | 2026-27 | |
| Science Marking Scheme | 2026-27 | |
| Science Question Paper | 2026 |
CBSE Class 10 Science Syllabus 2027: Unit-wise Marks Distribution
CBSE has split the theory paper into five units. Each unit has fixed marks. Read the syllabus of other subjects on the CBSE 10th Syllabus page.
| Unit | Unit Name | Marks |
|---|---|---|
| I | Chemical Substances: Nature and Behaviour | 25 |
| II | World of Living | 25 |
| III | Natural Phenomena | 12 |
| IV | Effects of Current | 13 |
| V | Natural Resources | 5 |
| Theory Total | 80 | |
| Internal Assessment | 20 | |
| Grand Total | 100 |
Unit I and Unit II carry 25 marks each. Together, they make up 50 out of 80 marks. So students should give them more time.
Class 10 Science Syllabus Chapter Wise Topics
The table below lists the 13 chapters of the Class 10 Science syllabus that come in the board exam. The main topics are taken from the official CBSE syllabus.
| Unit | Chapter | Main Topics |
|---|---|---|
| I | Chemical Reactions and Equations | Balanced equations, combination, decomposition, displacement, double displacement, precipitation, endothermic and exothermic reactions, oxidation and reduction |
| I | Acids, Bases and Salts | H+ and OH- ions, indicators, neutralisation, pH scale and its daily use, sodium hydroxide, bleaching powder, baking soda, washing soda, Plaster of Paris |
| I | Metals and Non-metals | Properties, reactivity series, ionic compounds, basic metallurgy, corrosion and how to stop it |
| I | Carbon and its Compounds | Covalent bonds, versatile nature of carbon, hydrocarbons, homologous series, naming of compounds, chemical properties, ethanol, ethanoic acid, soaps and detergents |
| II | Life Processes | Nutrition, respiration, transport and excretion in plants and animals |
| II | Control and Coordination | Tropic movements, plant hormones, nervous system, voluntary, involuntary and reflex action, animal hormones |
| II | How do Organisms Reproduce? | Asexual and sexual reproduction in plants and animals, reproductive health, family planning, HIV/AIDS, women's health |
| II | Heredity | Mendel's laws of inheritance, sex determination |
| III | Light: Reflection and Refraction | Spherical mirrors, mirror formula, magnification, laws of refraction, refractive index, spherical lenses, lens formula, power of a lens |
| III | The Human Eye and the Colourful World | Working of the eye lens, defects of vision and their correction, prism, dispersion and scattering of light |
| IV | Electricity | Current, potential difference, Ohm's law, resistance, resistivity, series and parallel resistors, heating effect, electric power |
| IV | Magnetic Effects of Electric Current | Magnetic field and field lines, field due to a straight wire, coil and solenoid, force on a conductor, Fleming's Left Hand Rule, AC and DC, domestic circuits |
| V | Our Environment | Ecosystem, ozone depletion, waste and its solutions, biodegradable and non-biodegradable substances |
Topics Not in CBSE Class 10 Science Board Exam 2027
Some topics are part of the syllabus, but they will not come in the board exam. Many students call this the deleted syllabus. Schools will check these topics only through class work and school tests.
| Unit | Topic Not in Board Exam |
|---|---|
| I | Periodic Classification of Elements (Döbereiner's Triads, Newlands' Law of Octaves, Mendeléev's Periodic Table, Modern Periodic Table) |
| II | Evolution (acquired and inherited traits, speciation, fossils, evolution by stages, human evolution) |
| IV | Electric Motor, Electromagnetic Induction and Electric Generator |
A few smaller parts are also left out. These are listed below.
- Students do not need to prove the mirror formula and the lens formula.
- The pH definition that uses logarithm is not needed.
- The colour of the sun at sunrise and sunset is not included.
- Information given in boxes in NCERT books will not be checked in the board exam.
Teachers may ask students to read the left-out topics. Students may also write short notes on them in their portfolio (a file of their school work).
CBSE Class 10 Science Exam Pattern 2027
The Science paper has 39 questions. The time given is 3 hours. Students must answer all questions. Some questions have an OR option. Learn more about board exam formats on the CBSE 10th Pattern page.
The table below shows the section-wise split.
| Section | Subject | Question Numbers | Total Questions | Marks |
|---|---|---|---|---|
| A | Biology | 1 to 16 | 16 | 30 |
| B | Chemistry | 17 to 29 | 13 | 25 |
| C | Physics | 30 to 39 | 10 | 25 |
| Total | 39 | 80 |
The next table shows the types of questions in the paper.
| Question Type | Marks per Question | Total Questions | Total Marks |
|---|---|---|---|
| Multiple Choice | 1 | 16 | 16 |
| Assertion-Reason | 1 | 4 | 4 |
| Short Questions | 2 | 6 | 12 |
| Short Questions | 3 | 7 | 21 |
| Case-based Questions | 4 | 3 | 12 |
| Long Questions | 5 | 3 | 15 |
| Total | 39 | 80 |
The 2026 question paper also gave 15 minutes of reading time. Students could only read the paper during this time.
Commonly asked questions
CBSE Class 10 Science is a 100-mark subject. The theory paper carries 80 marks. The other 20 marks come from internal assessment, which includes school tests, portfolio and practical work.
Chemical Substances and World of Living carry the most marks. Each unit is worth 25 marks. Together, they make up 50 out of 80 theory marks.
The paper has 39 questions. Section A Biology has 16, Section B Chemistry has 13 and Section C Physics has 10. Students must answer all questions in 3 hours.
CBSE has not removed these topics from the syllabus. But Periodic Classification of Elements, Evolution, and Electric Motor, Electromagnetic Induction and Electric Generator will not come in the board exam. Schools will check them in class.
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CBSE Class 10 Science Question Paper Design 2026-27
CBSE also sets marks by the type of thinking a question needs. The table below shows this split.
| Skill Tested | Percentage | Marks |
|---|---|---|
| Knowledge and Understanding | 50% | 40 |
| Using Knowledge and Concepts | 30% | 24 |
| Analyse, Evaluate and Create | 20% | 16 |
| Total | 100% | 80 |
Half the paper tests what students know and understand. The other half checks how well they use it. So learning by heart alone is not enough.
CBSE Class 10 Science Practical Syllabus and Internal Assessment
Internal assessment carries 20 marks. It has four parts of 5 marks each.
| Part | Marks |
|---|---|
| Periodic Assessment | 5 |
| Multiple Assessment | 5 |
| Portfolio | 5 |
| Subject Enrichment (Practical Work) | 5 |
| Total | 20 |
The syllabus has 14 practical experiments. Students should do them along with theory classes. The list is given below.
- Find the pH of samples like dilute HCl, NaOH, ethanoic acid, lemon juice and water.
- Study how HCl and NaOH react with litmus, zinc and sodium carbonate.
- Do reactions and sort them into combination, decomposition, displacement and double displacement types.
- Arrange Zn, Fe, Cu and Al in order of reactivity using salt solutions.
- Study how potential difference depends on current and draw a V-I graph.
- Find the equivalent resistance of two resistors in series and in parallel.
- Make a temporary mount of a leaf peel to show stomata.
- Show that carbon dioxide is given out during respiration.
- Study the properties of acetic acid.
- Compare the cleaning power of soap in soft and hard water.
- Find the focal length of a concave mirror and a convex lens.
- Trace the path of light through a glass slab.
- Study binary fission in Amoeba and budding in yeast and Hydra.
- Trace the path of light through a glass prism.
- Identify the parts of a dicot seed embryo, such as pea, gram or red kidney bean.
How to Download CBSE Class 10 Science Syllabus PDF
The syllabus is on the CBSE Academic website. Follow these steps to get it.
- Go to the official website, cbseacademic.nic.in.
- Open the Curriculum/Syllabus section.
- Look for Curriculum for the Academic Year 2026-27.
- Click on Secondary Curriculum: Part 1 (Class X).
- Open the Main Subjects (Group-A1) list.
- Click on Science. The PDF will open.
- Save the file on your phone or computer.
The Reading Material link is given right next to the CBSE 10th Science Syllabus link. It has the NCERT text for the topics that are not in the board exam.
NCERT Books for CBSE Class 10 Science
CBSE has listed these CBSE 10th books for the subject.
- Science Textbook for Class X (NCERT)
- Laboratory Manual: Science, Class X (NCERT)
- Exemplar Problems, Class X (NCERT)
- Assessment of Practical Skills in Science, Class X (CBSE)
- Reading Material: Science, Class X 2026-27 (CBSE)
Commonly asked questions
The CBSE Class 10 Science Syllabus 2026-27 has 13 chapters for the board exam. They are spread across five units, from Chemical Substances to Natural Resources.
The syllabus lists 14 practical experiments. They cover topics like pH, reactions, resistance, lenses, stomata and seed parts. Practical work carries 5 marks in internal assessment.
Preparation Tips for CBSE Class 10 Science Syllabus 2026-27
A clear plan makes Science easier. These tips can help students score well. More study plans are on the CBSE 10th Preparation page.
- Start with Unit I and Unit II. Together, they carry 50 marks.
- Read the NCERT textbook line by line. CBSE lists it as the main book.
- Practise diagrams often. Ray diagrams, the heart and the human eye all appear in the 2026-27 sample paper.
- Solve numericals in Light and Electricity every week.
- Learn chemical equations and balance them on paper.
- Skip the topics not in the board exam. Spend that time on the main chapters.
- Solve the 2026-27 sample paper and the 2026 question paper. Time yourself for 3 hours.
- Write each answer in its own section. Keep Biology, Chemistry and Physics apart.
The CBSE Class 10 Science Syllabus 2027 gives students a clear map of the subject. The paper has 39 questions across Biology, Chemistry and Physics. It carries 80 marks and runs for 3 hours. Units I and II carry the most marks. Students should follow the NCERT book and practise diagrams and numericals. They should also solve sample papers before the exam. This will help them write the paper with confidence.
News & Updates
Student Forum
Anything you would want to ask experts?Answered a week ago
The practical exams are expected in January 2027, before the theory papers. In 2026, BSEB held the matric practicals from January 20 to January 22.
S
Contributor-Level 10
Answered a week ago
BSEB has not announced a release date yet. The Bihar Board 10th Time Table 2027 is expected soon. Students can download it from biharboardonline.bihar.gov.in once it is out.
S
Contributor-Level 10
Answered 2 weeks ago
Boys and girls who have passed 10th Class can apply under Mukhyamantri Balak/Balika Protsahan Yojana. They register on the Medhasoft portal with details exactly as printed on their board marksheet.
S
Contributor-Level 10
Answered 2 weeks ago
CBSE Class 10th 2027 exam will be conducted in February-March. The exam will be held in India and Abroad in pen and paper mode.
A
Contributor-Level 10
Answered 2 weeks ago
CBSE 10th Datesheet 2027 will be released anytime soon. The datesheet will be made available in PDF form. Students can use the datesheet to plan preparation strategy for exam.,
I
Contributor-Level 8
Answered 3 weeks ago
Students in Class 9 or Class 10 from SC, ST, OBC, EBC, DNT, minority or disability groups can apply, if family income is within the scheme limit. The school must be a government school or a recognised one.
S
Contributor-Level 10
Answered 3 weeks ago
A pre-matric scholarship is government financial help for students studying in Class 9 and Class 10. It is meant to stop students from leaving school before the board exam. The money is not repaid.
S
Contributor-Level 10
Answered 3 weeks ago
Under the Dr Ambedkar Scholarship merit award, the top scorer gets INR 60,000. The second gets INR 50,000. The third gets INR 40,000. A girl topper outside the top three gets INR 40,000.
S
Contributor-Level 10
Answered 4 weeks ago
The MP Board Class 10 Mathematics exam duration is 3 hours.
S
Contributor-Level 10
Answered 4 weeks ago
Yes. The Special Scholarship is meant for students who passed 10th Class with 60% marks. They must join the first year of Intermediate, a vocational course, a Diploma or an ITI course in 2026-27.
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Contributor-Level 10
Shobhit Saini is a Senior Executive (Editorial) at Shiksha.com, where he covers one of the most closely watched beats in Indian education: board exams. With five years of experience in journalism and multimedia pro
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