NCERT Solutions for Class 7 Science provides clear, stepwise answers for every chapter in theCuriosity Class 7 Science book. Explanations follow the CBSE syllabus and National Council of Educational Research and Training guidance, with simple language, everyday examples, neat diagrams, and exam-style formatting. Use the chapter-sections tables below to jump to the exact area you want to revise.
Table of Contents
| Section | What You’ll Practise | Jump |
|---|---|---|
| Curiosity Book (New Syllabus) | 12 chapters with section-wise tables, concept recaps, and model answers | Open |
| Old Syllabus Chapters (Extra Practice) | Motion & Time, Electric Current, Light, Water, Forests, Wastewater | Open |
| Extra Resources | Notes, MCQs, Worksheets, and Revision PDFs | Go |
| FAQs | Study tips, answer writing, downloads | Open |
Curiosity Class 7 Science — Chapter-wise Sections & Solutions
Read the concept recap, then use the chapter table to open the specific section you need. For “explain/reason” questions,
write in cause→effect form and end with one real-life application. For numericals, show units in each step and box the final answer.
Chapter 1: The Ever-Evolving World of Science
How science progresses through observation, hypothesis, experimentation, and revision of ideas; why models change with new evidence; and how interdisciplinary links (biology-chemistry-physics-earth science) solve real problems. Practise defining the scientific method in your own words, listing steps in order, and giving one current example (e.g., vaccines, weather forecasting).
| Section ID | Section Title | What You Learn | Open |
|---|---|---|---|
| 1.1 | What is Science? | Nature of science; curiosity to concept; real-life impact | Solutions |
| 1.2 | Scientific Method | Observe → Hypothesise → Test → Conclude; variables & fair test | Solutions |
| 1.3 | Measurement & Units | SI units, accuracy, least count; recording data with units | Solutions |
| 1.4 | From Idea to Innovation | Case studies linking discovery to daily life (health, tech) | Solutions |
| 1.5 | HOTS & Applications | Reasoning questions; cause→effect writing; mini-projects | Solutions |
Chapter 2: Exploring Substances — Acidic, Basic, and Neutral
Classify substances using indicators (litmus, turmeric, china rose), understand neutralisation, and note safety (always add acid to water). Differentiate strength vs concentration. Daily-life links: antacids, toothpaste, soil treatment, bee-sting remedy.
| Section ID | Section Title | What You Learn | Open |
|---|---|---|---|
| 2.1 | Acids, Bases, Neutrals | Properties, household examples; safety rules | Solutions |
| 2.2 | Indicators & Tests | Litmus, turmeric, china rose; colour changes & inference | Solutions |
| 2.3 | Neutralisation | Acid + base → salt + water; everyday applications | Solutions |
| 2.4 | HOTS/Numericals | Reasoning on dilution; concentration vs strength basics | Solutions |
Chapter 3: Electricity — Circuits and Their Components
Build and read simple circuits; symbols; series vs parallel; current flow direction; safety (fuse/MCB). Predict glow/no-glow with reasoning and draw neat diagrams (cell, switch, bulb, resistor) with arrows and labels.
| Section ID | Section Title | What You Learn | Open |
|---|---|---|---|
| 3.1 | Circuit Basics | Closed vs open circuit; conventional current; symbols | Solutions |
| 3.2 | Series & Parallel | Brightness & resistance ideas; household relevance | Solutions |
| 3.3 | Electrical Safety | Fuse, MCB, insulation; safe handling & first-aid basics | Solutions |
| 3.4 | HOTS/Reasoning | Predict outcomes; fix broken circuit logic; draw & label | Solutions |
Chapter 4: The World of Metals and Non-metals
Compare properties (lustre, malleability, ductility, conductivity), chemical behaviour, and real uses (wires, utensils, foils). Explain “property → use” in a single, crisp line to score step marks.
Chapter 5: Changes Around Us — Physical and Chemical
Recognise physical (often reversible, no new substance) vs chemical changes (new substance, often irreversible). Indicators: gas, precipitate, heat/light. Add one daily example with a short reason.
Chapter 6: Adolescence — A Stage of Growth and Change
Physical, emotional, and social changes at puberty; hormones; hygiene; nutrition; exercise; sleep. Normalise variation; use science words correctly and keep tone respectful.
| Section ID | Section Title | What You Learn | Open |
|---|---|---|---|
| 6.1 | Changes at Puberty | Physical markers; growth spurts; timelines vary | Solutions |
| 6.2 | Hormones & Health | Role of hormones; balanced diet; exercise; sleep | Solutions |
| 6.3 | Hygiene & Well-being | Cleanliness, mental health basics, safe habits online/offline | Solutions |
Chapter 7: Heat Transfer in Nature
Conduction (solids), convection (fluids), radiation (no medium). Applications: black/white surfaces, sea-breeze/land-breeze. Use particle motion and density ideas for explanations.
Chapter 8: Measurement of Time and Motion
Speed = distance/time; unit conversions (km/h ↔ m/s); reading distance–time graphs; average vs instantaneous speed. Always show units; box the final answer.
Chapter 9: Life Processes in Animals
Digestive, respiratory, circulatory, and excretory systems; how they coordinate during activity. Draw labelled diagrams; keep arrows neat; add one function per label.
| Section ID | Section Title | What You Learn | Open |
|---|---|---|---|
| 9.1 | Nutrition & Digestion | Organs, enzymes (basic), absorption; balanced diet idea | Solutions |
| 9.2 | Breathing & Respiration | Breathing vs respiration; gas exchange basics | Solutions |
| 9.3 | Blood & Circulation | Heart idea, pulse, blood vessels; exercise effects | Solutions |
| 9.4 | Excretion | Kidneys’ role; basics of filtration & reabsorption idea | Solutions |
Chapter 10: Life Processes in Plants
Photosynthesis, transport (xylem/phloem), transpiration and stomata. Mention iodine test for starch; explain water movement via root pressure/transpiration pull (at grade level).
| Section ID | Section Title | What You Learn | Open |
|---|---|---|---|
| 10.1 | Photosynthesis | Equation idea, chlorophyll, sunlight, CO₂, water, food storage | Solutions |
| 10.2 | Transport in Plants | Xylem (water/minerals), phloem (food); direction basics | Solutions |
| 10.3 | Transpiration | Stomata, cooling, water pull; simple experiment setup | Solutions |
Chapter 11: Light, Shadows, and Reflections
Rectilinear propagation, shadow rules, pinhole camera idea, plane mirror and laws of reflection (∠i = ∠r). Draw normals, incident and reflected rays with arrows and labels for full credit.
Chapter 12: Earth, Moon, and the Sun
Rotation and revolution; seasons (tilt), day–night; Moon phases (NOT Earth’s shadow), eclipse basics & safety. When answering, pair the phenomenon with one cause line (e.g., “tilt + revolution ⇒ seasons”).
Old Syllabus — Extra Practice (Concept Refreshers)
| Chapter | Focus | Open |
|---|---|---|
| 13. Motion and Time | Uniform/non-uniform motion, average speed, d–t graphs | Solutions PDF |
| 14. Electric Current and Its Effects | Heating & magnetic effects, fuse, simple electromagnet | Solutions PDF |
| 15. Light | Reflection, periscope, kaleidoscope, pinhole camera | Solutions PDF |
| 16. Water: A Precious Resource | Water cycle, scarcity, conservation methods | Solutions PDF |
| 17. Forests: Our Lifeline | Ecosystem roles, soil protection, biodiversity | Solutions PDF |
| 18. Wastewater Story | STP steps, pollution, health and hygiene | Solutions PDF |
Extra Resources (Free PDFs)
| Resource | Why Use It | Action |
|---|---|---|
| NCERT Class 7 Science Textbook (Curiosity) | Primary text; read line-by-line with our solutions for accuracy | Download Book |
| Chapter-wise Solutions (Curiosity) | Step-marked answers with examples, units, and diagrams | Download All |
| Notes, MCQs & Worksheets | Quick recap + practice mirroring school assessments | Open Sets |
FAQs – NCERT Solutions for Class 7 Science
proper units, labelled diagrams, and one-line conclusions to match school marking.
For numericals, show units each step and box the final answer; for diagrams, label neatly.
and reasoning that match how teachers evaluate answers.