# TN Board Class 7 Science Syllabus 2021-22 | Samacheer Kalvi Class 8 Science Syllabus

Science is one of the most important subjects in schools because of its relevance to students’ lives and the universally applicable problem-solving and critical thinking skills. Various concepts and topics from the subject that are introduced from Class 7 are further discussed at length in higher classes. Here, in this article, students can easily find details of theÂ  Samacheer Kalvi TN Board Class 7 Science Syllabus, which gives an overview of the major concepts and topics taught in class for the current academic year.

## Samacheer Kalvi TN Board Class 7 Science Syllabus 2021-22

The Samacheer Kalvi class 7 Syllabus provided by the TN board gives the knowledge on matter around us, living world of plants and animals, light, heat, measurements etc.

 PHYSICS Measurements Idea of derived quantities and Units (Area, Volume, Density of solids and liquids) Explanation and Measuring Astronomical distance. 1 AU & 1 light year. Numerical problems Work, Power and Energy Distance â€“ displacement Speed & velocity Distance- time graph Velocity â€“ time graph Acceleration â€“ time Centre of gravity and three states of equilibrium Plumb line and spirit level Science today Adventures in sports â€“ like a bird flies Measure and calculate the speed of moving objects pulse rate Numerical problems Light Sources of Light Rectilinear propagation of Light Pinhole camera Shadows Colours in Spectrum Reflection Plane Mirror (Right or left) Sunlightâ€“seven coloursâ€“dispersion & synthesis of colours â€“ Newtonâ€™s Disc. Numerical problems Heat Heat & Temperature. Thermodynamic scales: Celsius, Fahrenheit, Kelvin and Rankin. Measuring temperature: Clinical and Laboratory thermometer. Thermometric liquids Numerical problems. Electricity Explain the classification of materials based on electrical properties. Describe simple electric circuit â€“ Open circuit and Closed circuit. Explains heating effect and magnetic effect of electric current. Universe and Space Science Basic concepts of Universe- milky way Building blocks of Universe Satellites – Natural and Artificial ISRO
 CHEMISTRY Matter Around Us Separation of substances – Evaporation – Condensation – Crystallization. Effect of temperature on – solid, liquid and gases Occurrence of Elements and Compounds in nature Elements in human body Elements in air Molecules of Elements and Compounds Symbols of some common elements Atomicity of elements Changes Around Us Physical change-Crystallization-Melting-Evaporation-Freezing-Sublimation-Chemical change-Rusting of iron-Burning Curdling Chemical reaction of Baking Soda with lemon juice Conditions needed for a chemical change Indicators of a chemical change Periodic and non periodic change Endothermic and Exothermic change Fermentation Atomic Structure Structure of an atom Sub-atomic particles and its properties Molecules, compounds mixture and its types Symbols Wastes and its Management Synthetic fibers-Types and uses Polymers Plastics-Types and uses-Hazardness of Plastics PLA Plastics Various methods of disposing Plastics Biodegradable plastics Plastic eating Bacteria Glass-Types and uses Chemistry in Everyday life Medicines â€“Antibiotics-Analgesics-Antipyretic-Antiseptics-Antihistamine-Antacids/O RS Combustion and its types Flame and its structure Fire control Fire extinguishers
 BIOLOGY Living world of Plants Characteristics of living things Habitat â€“ Aquatic and Terrestrial plants Herbs, shrubs and trees Parts of plants – Root, stem, leaves and flowers Reproduction in plants, Pollination, Types of Pollination, Pollinators, Fertilization Modification of roots, stems, leaves 1.6 Kinds of stems Living World of Animals Need for classification The 5 kingdom classification Binomial Nomenclature (Introduction) Health and Hygiene Test for Starch, protein and Fat-Taking care of our body-taking care of our teeth, our eyes , hair Hygienic habits Communicable diseases (Bacteria and Virus) Any 3 Safety and first aid (cuts and burns) Organization in Organisms Introduction of human organ systems and functions The body and health as understood in the Indian system health care Life Process Plant and animal cell comparison Cell as a fundamental unit of life Human cells related to functions. Structure and function of all cell organelles (in brief.) Environmental Science â€“ Resource use and Management Availability of water Sources of water Forms of water Ground water Depletion of water Distribution of water Scarcity of water Water management-Rain water harvesting-Desalination of sea water (R.O) Economic Biology Animal products (Food, Clothing, ) Animal Fibers(wool, silk) Hazards in silk and wool industries (ANTHRAX) Sericulture and Ahimsha/Peace silk Poultry farming Animal protection and maintenance

## Why should we study Science?

Because there are some reasons

• Science prepares for future.
• Science feeds a natural love for learning
• Science opens doors to many disciplines