The Living World (A Book of Science & Technology) is the DAV Class 7 Science book from the DAV College Managing Committee’s Publication Division. It has 17 chapters and 262 pages. The biology chapters cover nutrition in plants and animals, respiration, transport and plant reproduction. Chemistry gets atoms, formulae and chemical equations, then acids, bases and salts. The physics chapters are heat, motion and time, static electricity with the gold-leaf electroscope, mirrors, and electric current.
Before you download: this scan ends at page 201, partway through Chapter 13. Chapters 14 to 17 (Fabric from Fibre, Forests, Water, and Electric Current and Its Effects) are not in it. Solutions for all four are linked in the table.
Read the Class 7 Science Book Online
DAV Class 7 Science: All 17 Chapters
| Chapter | What it covers | Solutions |
|---|---|---|
| 1. Nutrition in Living Organisms—Plants (p. 1) | Autotrophic and heterotrophic nutrition, photosynthesis, chlorophyll, stomata, parasitic plants like Cuscuta, insectivorous plants, saprotrophic nutrition, and symbiotic relationships | Chapter 1 solutions |
| 2. Nutrition in Living Organisms—Animals and Man (p. 14) | Modes of food intake, herbivores, carnivores, omnivores, human digestive system, alimentary canal, teeth, rumination in ruminants, and nutrition in Amoeba | Chapter 2 solutions |
| 3. Chemical Substances and Processes (p. 31) | Atoms, molecules, pure substances, elements, compounds, mixtures, chemical symbols, chemical formulae, ions, chemical equations, and types of chemical reactions | Chapter 3 solutions |
| 4. Acids, Bases and Salts (p. 46) | Mineral and organic acids, bases, alkalies, indicators like litmus, neutralisation reactions, naming and properties of salts, and electrical conductivity of salts | Chapter 4 solutions |
| 5. Heat (p. 59) | Heat energy, temperature, thermometers, Celsius and Fahrenheit scales, conduction, conductors, insulators, convection currents, land and sea breezes, and radiation | Chapter 5 solutions |
| 6. Motion and Time (p. 81) | Relative motion, rectilinear motion, uniform and non-uniform motion, measurement of time, simple pendulum, time period, measuring speed, and distance-time graphs | Chapter 6 solutions |
| 7. Respiration in Organisms (p. 102) | Cellular respiration, aerobic and anaerobic respiration, yeast fermentation, muscle cramps, respiration in plants, stomata, lenticels, and respiration in animals | Chapter 7 solutions |
| 8. Transportation in Plants and Animals (p. 115) | Diffusion, transpiration, xylem, phloem, human circulatory system, blood vessels, arteries, veins, capillaries, RBCs, WBCs, platelets, heart, pulse rate, and human excretory system | Chapter 8 solutions |
| 9. Reproduction in Plants (p. 129) | Asexual reproduction including budding, fragmentation, spore formation, vegetative propagation, sexual reproduction in flowers, stamen, pistil, pollination, fertilization, and seed dispersal | Chapter 9 solutions |
| 10. Soil (p. 145) | Soil formation, weathering, soil profile, horizons O, A, B, C, R, sandy, clayey, loamy soils, soil properties, vermicomposting, soil pollution, and soil erosion | Chapter 10 solutions |
| 11. Electric Charges at Rest (p. 159) | Electric charges, charged and uncharged objects, earthing, methods of charging by friction, conduction, and induction, gold leaf electroscope, lightning, and lightning conductors | Chapter 11 solutions |
| 12. Light (p. 176) | Plane mirrors, virtual and real images, lateral inversion, laws of reflection, multiple images, kaleidoscope, spherical mirrors, concave and convex mirrors, and ray diagrams | Chapter 12 solutions |
| 13. Weather, Climate and Adaptation of Animals (p. 198) | Weather elements including temperature, humidity, cloudiness, precipitation, wind, atmospheric pressure, meteorology, climate, and climatic zones of India | Chapter 13 solutions |
| 14. Fabric from Fibre (p. 213) | not in this scan | Chapter 14 solutions |
| 15. Forests (p. 222) | not in this scan | Chapter 15 solutions |
| 16. Water (p. 237) | not in this scan | Chapter 16 solutions |
| 17. Electric Current and Its Effects (p. 246) | not in this scan | Chapter 17 solutions |
Chapters mix Activity boxes (hands-on experiments) with Do You Know? facts and notes for the teacher. The exercises are in Something To Know at the end, and most chapters add a Value Based Question and a Something To Do project. Heat (22 pages) and Light (22 pages) are the longest chapters.
Questions about the DAV Class 7 Science Book
Is DAV Class 7 Science the same as NCERT Class 7 Science?
No. Several topics overlap, such as nutrition, respiration, acids and bases, heat and soil, but the DAV book has its own chapters, order and exercises. The official chapter list is on the contents page of DAV CAE’s sample of The Living World 7.