Science

This is a complete, free study companion for Science — built around what the exam actually asks. The topics examiners repeat most are Ohm's Law, V-I graph and resistance numericals, Mirror formula and lens formula numericals, and Photosynthesis, digestive system and life processes. The syllabus runs to 12 chapters. Below you'll find the full topic-frequency ranking, the exam paper pattern, every chapter, a step-by-step study plan, and the official downloads — everything in one place.

Everything here is free. We're an independent student resource, not the official Karnataka Board body, so always confirm the current syllabus and exam dates on the official Karnataka Board website before you rely on them.

Key information

Level: Class 10
Stream: Core
Exam: Secondary School Leaving Certificate
Conducted by: Karnataka School Examination and Assessment Board (KSEAB)

Most important topics (by past-paper frequency)

#	Topic	Times asked	Likelihood
1	Ohm's Law, V-I graph and resistance numericals	4	80%
2	Mirror formula and lens formula numericals	4	80%
3	Photosynthesis, digestive system and life processes	4	80%
4	Mendel's monohybrid cross and human sex determination	4	80%
5	Electric power, energy and kWh calculation	4	80%
6	Oxidation, reduction, corrosion and rancidity	4	80%
7	pH scale and importance of pH in daily life	4	80%
8	Ionic compounds and properties of electrovalent compounds	4	80%
9	Human heart, double circulation and blood vessels	4	80%
10	Reflex arc, neuron and nervous coordination	4	80%
11	Flower reproduction, pollination and fertilisation	4	80%
12	Food chain, trophic levels and 10 percent law	4	80%

Based on how often each topic appeared in official previous-year question papers.

What you will study (chapters)

Chapter 1: Chemical Reactions and Equations
Chapter 2: Acids, Bases and Salts
Chapter 3: Metals and Non-Metals
Chapter 4: Light: Reflection and Refraction
Chapter 5: Electricity
Chapter 6: Magnetic Effects of Electric Current
Chapter 7: Life Processes
Chapter 8: Control and Coordination
Chapter 9: How Do Organisms Reproduce?
Chapter 10: Heredity and Evolution
Chapter 11: Our Environment
Chapter 12: Sustainable Management of Resources

How to study Science and score well

Start with the highest-frequency topics — In Science, Ohm's Law, V-I graph and resistance numericals, Mirror formula and lens formula numericals, Photosynthesis, digestive system and life processes, and Mendel's monohybrid cross and human sex determination appear again and again in past papers. Master these first — they return the most marks for the time you put in.
Practise with previous-year papers — Solve the last 5–10 years of Karnataka Board Science papers under timed, exam-like conditions. Past papers show exactly which topics repeat and how questions are worded.
Revise actively, not passively — Write a one-page summary for each of the 12 chapters — key definitions, formulas and the points examiners reward — then re-test yourself instead of re-reading.
Mark your answers with the official scheme — After each practice paper, score yourself against the official marking scheme. It shows how marks are awarded step-by-step, so you learn to present answers the way examiners expect.

Exam tips: how to score higher in Science

Where students lose marks: rushing the high-weightage questions, skipping the steps the marking scheme rewards, and saving easy sections for last. Read the whole paper first, attempt your strongest section early to bank marks, and always show your working.

Manage your time: split your time in proportion to the marks each section carries, keep a few minutes at the end to check, and never leave a question blank — a partial, structured answer still earns partial marks.

Frequently asked questions

What are the most important topics in Science?

Based on past papers, the most frequently asked topics include Ohm's Law, V-I graph and resistance numericals, Mirror formula and lens formula numericals, Photosynthesis, digestive system and life processes. The full ranked list with how often each appears is in the "Most important topics" section above.

Where can I download Science previous-year question papers?

Official Karnataka Board previous-year question papers are available on the official Karnataka Board website. Open the Question Papers section for the direct link, plus the exam pattern and the topics that repeat most.

How can I prepare for Science faster?

Start with the highest-frequency topics, learn the exam pattern so you know how each section is marked, and practise with past papers. A subject-aware study tutor can quiz you on exactly these topics.

A Gyani AI tutor trained on the Science syllabus and past papers can quiz you on the most-asked topics and show you exactly what to revise.