# Science — NCERT Class 9 — CBSE (NCERT textbooks) — Shishya school context > Subject page: https://shishya.in/schooling/cbse/class-9/science · class: https://shishya.in/schooling/cbse/class-9 (context: https://shishya.in/schooling/cbse/class-9/context.md) · data as of 2026-10-10 (IST). Free to cite; link back to the subject page. > Honesty: Shishya never reproduces, summarises or translates textbook text — read a chapter at its official link. Practice questions are Shishya's own, written by AI and answer-checked before they are shown; they are not NCERT exercises, not board questions and not previous-year questions. A chapter marked "not ready yet" has no Shishya notes or practice, and its Shishya page is not linked here. > Children: Class 1-7 school pages have no chat tutor, offer no sign-in and ask no child to create an account. On Class 8-12 pages a student may sign in to save practice to an account — for students 13 and above; no school page asks anyone their age or role — and anyone can read a chapter, take its practice where the chapter has one and ask the AI tutor about it without signing in; the tutor says it is an AI and answers study questions only, with a daily message limit. The 5-question practice on the chapter pages that have it needs no account, and no result is saved to any account or profile from it: Shishya records only an anonymous usage event (which chapter was practised and the score) — on Class 8-12 pages with the same cookie-based analytics every page view sends, on Class 1-7 pages with no cookie, account or other visitor identifier. A signed-in student's own practice set is saved to that account. ## Science - Book: Exploration — https://ncert.nic.in/textbook.php?iesc1=0-13 (NCERT also lists Hindi edition) - Chapters (13; 13 with Shishya notes, 13 with answer-checked practice of 5+ questions): - Chapter 1 — Exploration: Entering the World of Secondary Science — Shishya notes + 40 answer-checked practice questions: https://shishya.in/schooling/cbse/class-9/science/exploration-entering-the-world-of-secondary-science · official PDF: https://ncert.nic.in/textbook/pdf/iesc101.pdf - Chapter 2 — Cell: The Building Block of Life — Shishya notes + 39 answer-checked practice questions: https://shishya.in/schooling/cbse/class-9/science/cell-the-building-block-of-life · official PDF: https://ncert.nic.in/textbook/pdf/iesc102.pdf - Chapter 3 — Tissues in Action — Shishya notes + 40 answer-checked practice questions: https://shishya.in/schooling/cbse/class-9/science/tissues-in-action · official PDF: https://ncert.nic.in/textbook/pdf/iesc103.pdf - Chapter 4 — Describing Motion Around Us — Shishya notes + 40 answer-checked practice questions: https://shishya.in/schooling/cbse/class-9/science/describing-motion-around-us · official PDF: https://ncert.nic.in/textbook/pdf/iesc104.pdf - Chapter 5 — Exploring Mixtures and their Separation — Shishya notes + 39 answer-checked practice questions: https://shishya.in/schooling/cbse/class-9/science/exploring-mixtures-and-their-separation · official PDF: https://ncert.nic.in/textbook/pdf/iesc105.pdf - Chapter 6 — How Forces Affect Motion — Shishya notes + 39 answer-checked practice questions: https://shishya.in/schooling/cbse/class-9/science/how-forces-affect-motion · official PDF: https://ncert.nic.in/textbook/pdf/iesc106.pdf - Chapter 7 — Work, Energy, and Simple Machines — Shishya notes + 40 answer-checked practice questions: https://shishya.in/schooling/cbse/class-9/science/work-energy-and-simple-machines · official PDF: https://ncert.nic.in/textbook/pdf/iesc107.pdf - Chapter 8 — Journey Inside the Atom — Shishya notes + 49 answer-checked practice questions: https://shishya.in/schooling/cbse/class-9/science/journey-inside-the-atom · official PDF: https://ncert.nic.in/textbook/pdf/iesc108.pdf - Chapter 9 — Atomic Foundations of Matter — Shishya notes + 46 answer-checked practice questions: https://shishya.in/schooling/cbse/class-9/science/atomic-foundations-of-matter · official PDF: https://ncert.nic.in/textbook/pdf/iesc109.pdf - Chapter 10 — Sound Waves: Characteristics and Applications — Shishya notes + 39 answer-checked practice questions: https://shishya.in/schooling/cbse/class-9/science/sound-waves-characteristics-and-applications · official PDF: https://ncert.nic.in/textbook/pdf/iesc110.pdf - Chapter 11 — Reproduction: How Life Continues — Shishya notes + 39 answer-checked practice questions: https://shishya.in/schooling/cbse/class-9/science/reproduction-how-life-continues · official PDF: https://ncert.nic.in/textbook/pdf/iesc111.pdf - Chapter 12 — Patterns in Life: Diversity and Classification — Shishya notes + 40 answer-checked practice questions: https://shishya.in/schooling/cbse/class-9/science/patterns-in-life-diversity-and-classification · official PDF: https://ncert.nic.in/textbook/pdf/iesc112.pdf - Chapter 13 — Earth as a System: Energy, Matter, and Life — Shishya notes + 39 answer-checked practice questions: https://shishya.in/schooling/cbse/class-9/science/earth-as-a-system-energy-matter-and-life · official PDF: https://ncert.nic.in/textbook/pdf/iesc113.pdf - Shishya content last updated: 2026-09-26 ## Other subjects in this class - English: https://shishya.in/schooling/cbse/class-9/english - Hindi: https://shishya.in/schooling/cbse/class-9/hindi - Sanskrit: https://shishya.in/schooling/cbse/class-9/sanskrit - Mathematics: https://shishya.in/schooling/cbse/class-9/mathematics - Social Science: https://shishya.in/schooling/cbse/class-9/social-science - Arts: https://shishya.in/schooling/cbse/class-9/arts - Urdu: https://shishya.in/schooling/cbse/class-9/urdu - Physical Education and Well Being: https://shishya.in/schooling/cbse/class-9/physical-education-and-well-being - ICT: https://shishya.in/schooling/cbse/class-9/ict - Skill Education: https://shishya.in/schooling/cbse/class-9/skill-education