Science

This is a complete, free study companion for Science — built around what the exam actually asks. The topics examiners repeat most are Photosynthesis and autotrophic nutrition in plants, Human digestive system and digestion process, and Conduction, convection and radiation. The syllabus runs to 18 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 CBSE body, so always confirm the current syllabus and exam dates on the official CBSE website before you rely on them.

Key information

Level: Class 7
Programme: CL07
Exam: School Based Examination
Conducted by: Central Board of Secondary Education (CBSE)

Most frequently examined topics

#	Topic	Times asked
1	Photosynthesis and autotrophic nutrition in plants	5
2	Human digestive system and digestion process	5
3	Conduction, convection and radiation	5
4	Neutralisation reaction and applications	5
5	Physical and chemical changes	5
6	Cyclone formation and storm safety	5
7	Sandy, clayey and loamy soils	5
8	Aerobic and anaerobic respiration	5
9	Components of blood and their functions	5
10	Structure and working of the human heart	5
11	Parts of a flower and reproduction in flowering plants	5
12	Speed, distance and time numerical problems	5

Counted across the official previous-year question papers we have analysed for this subject. It shows what has been asked before — it does not predict what will appear in your exam. Always confirm the current syllabus on the official portal.

What you will study (chapters)

Chapter 1: Nutrition in Plants
Chapter 2: Nutrition in Animals
Chapter 3: Fibre to Fabric
Chapter 4: Heat
Chapter 5: Acids, Bases, and Salts
Chapter 6: Physical and Chemical Changes
Chapter 7: Weather Climate and Adaptation of Animals to Climate
Chapter 8: Winds, Storms, and Cyclones
Chapter 9: Soil
Chapter 10: Respiration in Organisms
Chapter 11: Transportation in Animals and Plants
Chapter 12: Reproduction in Plants
Chapter 13: Motion and Time
Chapter 14: Electric Current and Its Effects
Chapter 15: Light
Chapter 16: Water: A Precious Resource
Chapter 17: Forest: Our Lifeline
Chapter 18: Waste Water Story

Official textbook

Science — official textbook / study material — Free download from the official source.

How to study Science and score well

Start with the highest-frequency topics — In Science, Photosynthesis and autotrophic nutrition in plants, Human digestive system and digestion process, Conduction, convection and radiation, and Neutralisation reaction and applications 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 CBSE 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 18 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 Photosynthesis and autotrophic nutrition in plants, Human digestive system and digestion process, Conduction, convection and radiation. 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 CBSE previous-year question papers are available on the official CBSE 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.