Karnataka SSLC vs CBSE: How the Science Marking Scheme Actually Differs

A student who moves from a CBSE school to a Karnataka school, or who prepares with CBSE material while writing the SSLC exam, quickly notices that the two Science papers feel different. The syllabus overlaps, but the way marks are organised, the way the paper is divided and the way difficulty is controlled are not the same. This article compares the Karnataka SSLC vs CBSE Science marking scheme point by point, so you know what to carry over and what to unlearn.

The comparison below covers the structure of the paper, how marks are grouped, how difficulty is handled and how internal assessment works in each board.

The Headline Numbers Side by Side

Both boards treat Science as a 100-mark subject in Class 10, made up of an 80-mark written paper and 20 marks of internal assessment. That is where the similarity ends.

The CBSE figures come from its curriculum document. The pass marks are those in force for the 2025-26 session.

How CBSE Groups the 80 Marks

CBSE divides the Science paper into five units: Chemical Substances (25 marks), World of Living (25), Natural Phenomena (12), Effects of Current (13) and Natural Resources (5). These cut across the usual subject lines. Physics is spread across two units, and Biology is spread across two as well. A CBSE student is therefore expected to think in terms of themes. For help deciding which of these chapters to give most time, see our guide to the most important chapters in Class 10 Science for CBSE boards 2026.

How Karnataka SSLC Groups the Marks

The SSLC paper is organised by the three sciences. Physics, Chemistry and Biology each form a block of questions in the 80-mark written paper, with the 20 internal marks kept separate.

What matters for you is the shape: an SSLC student can see Physics, Chemistry and Biology as three blocks, and prepare each one with equal seriousness. That is different from the five-unit view in CBSE.

How Each Board Plans the Paper

CBSE describes its paper in terms of competencies. The curriculum states that 50 per cent of the marks test knowledge and understanding, 30 per cent test application of concepts, and 20 per cent test the ability to formulate, analyse, evaluate and create. It also says an internal choice of about 33 per cent is provided. The paper contains very short and objective questions, assertion-reasoning, short and long answers, and case-based questions.

The Karnataka paper follows the board’s published blueprint, which plans marks chapter by chapter. The practical point is that an SSLC student prepares chapter by chapter against that blueprint, while a CBSE student also prepares for the skill each question tests, such as recall, application or analysis.

Our SSLC question paper structure guide explains the Karnataka layout in more detail, and our comparison of CBSE and Karnataka SSLC preparation approaches covers how study habits differ.

Internal Assessment: Where the Structures Part Ways

CBSE spells out its 20 internal marks: 5 marks for the average of the best two periodic tests, 5 marks for other assessment methods such as quizzes and projects, 5 marks for subject enrichment through practical work, and 5 marks for a portfolio. Because the components are fixed, students and schools know exactly what is being measured.

For Karnataka SSLC, internal assessment is 20 marks and is separate from the 80-mark paper. Schools carry out the assessment and record the marks. If you are moving between boards, this is the area to sort out early, because internal marks are the easiest to lose through missed submissions. For a broader view, read our note on internal assessment versus board exams in Class 10.

What the Differences Mean for Your Preparation

The syllabus content of Class 10 Science is similar in both boards, so notes and concepts travel well. What changes is how you rehearse for the paper.

• If you are a CBSE student, revise by unit and practise case-based and assertion-reasoning questions. Use CBSE Class 10 Science sample papers to see how those question types appear.
• If you are an SSLC student, revise by subject block, Physics, Chemistry and Biology, and practise questions across difficulty levels. Our Science model papers for KSEEB and previous year papers are made for this.
• If you are switching boards, do not assume the paper is a copy of what you are used to. Read our guide on what changes when you switch between CBSE and KSEEB before you start.
• Use the board’s own papers first. Papers from the other board are good for extra practice, but they do not show your board’s pattern.

If you are preparing for both, for example for a competitive test that draws on CBSE material, learn the concepts from one set of notes and practise questions from the board you will write. A simple way to do this is to split your week. Use two or three days for concept revision from your main notes, and the other days for timed practice from your own board’s papers. After each paper, sort the marks you lost into three groups: concept errors, careless errors and time pressure. Concept errors send you back to the notes, careless errors need a checking routine, and time pressure needs more timed practice. This method works the same way for CBSE and for SSLC, which is why it is a safe habit to build even if the paper patterns differ.

One more practical point is the order in which you attempt the paper. CBSE students can move between units freely, so many start with the section they find easiest and leave the longest answers for last. SSLC students see Physics, Chemistry and Biology grouped in sequence, and may prefer to attempt one subject block at a time. Whichever board you write, decide your order in advance and rehearse it in at least two full practice papers, so you are not making that decision for the first time on the day.

Language and Presentation of Answers

Another difference is the medium. SSLC Science papers are available in Kannada and English, and KSEEB-style practice is offered in both. If you study in one language and want to practise in the other, it helps to learn the key scientific terms in both. Our KSEEB science sample papers in Kannada and English medium can help with this. In both boards, diagrams, equations and keywords carry marks, so learn the standard labelled diagrams well.

Frequently Asked Questions

Q1. Is the Science Paper 80 Marks in Both CBSE and Karnataka SSLC?

Yes, both have an 80-mark written paper with 20 marks for internal assessment.

Q2. How Are Physics, Chemistry and Biology Marks Divided in SSLC?

The SSLC paper treats Physics, Chemistry and Biology as three separate blocks, and the board’s blueprint plans the marks chapter by chapter. Prepare all three blocks with equal seriousness.

Q3. Does CBSE Divide Science Marks by Subject?

No. CBSE divides marks by five units, so Physics, Chemistry and Biology are spread across them. Chemical Substances and World of Living carry 25 marks each.

Q4. Which Board’s Science Paper Is Harder?

There is no reliable single answer. Both boards test the same ideas at a similar level, but the question styles differ. The better question is which pattern you are used to.

Q5. Can I Use CBSE Sample Papers to Prepare for SSLC?

They are useful for extra practice on concepts, but they do not follow the SSLC pattern. Start with KSEEB model and previous papers, and use CBSE papers as additional practice.

Conclusion: Know Your Board’s Pattern Before You Practise

The two boards give the same weight to Science, 80 marks for the paper and 20 for internal work, but they organise the paper differently. CBSE groups marks into five units and describes difficulty through competencies. Karnataka SSLC groups them into Physics, Chemistry and Biology and plans them chapter by chapter in its blueprint. Use this comparison as a guide, and practise from papers that match your board’s pattern.