Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 8

# Tamil Nadu Board Samacheer Kalvi Solutions for Class 8th Science Answers Guide

## Tamil Nadu Board of Secondary Education Class 8 Science Solutions Guide

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## Tamil Nadu Board of Secondary Education Class 8 Science Textbook Solutions

Questions and answers for the Class 8 Science Textbook on this page. Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science Digest Tamil Nadu Board of Secondary Education will help students understand the concepts better.

## Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science Chapterwise List | Class 8 Science Digest

The answers to the Tamil Nadu Board Samacheer Kalvi books are the best study material for students. Listed below are the chapter-wise Tamil Nadu Board Samacheer Kalvi Science Class 8 Solutions Tamil Nadu Board of Secondary Education.

## Tamil Nadu Board Samacheer Kalvi Class 8 solutions for other subjects

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## Chapters covered in Tamil Nadu Board Samacheer Kalvi Solutions for Class 8th Science Answers Guide

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 1: Measurement

Concepts covered in Measurement are Accuracy in Measurements, Approximation, Base Quantities and Units, Clocks, International System of Units (SI System), Measurements, Physical Quantities, Rounding off, Unit and Its Types, Unit Systems

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 1: Measurement exercises

ExerciseNo. of questionsPages
Exercises419 to 10

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 2: Force and Pressure

Concepts covered in Force and Pressure are Advantages and Disadvantage of Friction, Application of Pascal’s Law, Atmospheric Pressure, Buoyancy Force (Upthrust Force), Effect of Force, Factors Affecting Pressure, Force, Force of Friction, Increasing and Reducing Friction, Kinds of Friction, Liquid Pressure, Measurement of Atmospheric Pressure, Mercury Barometer (Simple Barometer), Pascal’s Law, Surface Tension, Thrust and Pressure, Viscous Force or Viscosity

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 2: Force and Pressure exercises

ExerciseNo. of questionsPages
Exercises4919 to 20

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 3: Light

Concepts covered in Light are Concave Mirror, Convex Mirror, Dispersion of Light Through Prism and Formation of Spectrum, Images Formed by Spherical Mirrors, Law of Reflection of Light, Law of Refraction of Light, Light, Mirrors and Its Types, Multiple Reflections, Prism, Refraction of Light, Refractive Index, Spherical Mirrors, Types of Reflection

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 3: Light exercises

ExerciseNo. of questionsPages
Exercises2633 to 34

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 4: Heat

Concepts covered in Heat are Calorimetry and Calorimeter, Conduction, Convection, Effects of Heat, Heat and Its Unit, Radiation, Scales of Thermometers, Specific Heat Capacity, Temperatures, Thermal Capacity (Heat Capacity), Thermos Flask (Dewar Flask), Thermostat, Transfer of Heat

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 4: Heat exercises

ExerciseNo. of questionsPages
Exercises3543 to 44

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 5: Electricity

Concepts covered in Electricity are Chemical Effects of Electric Current, Direction of the Electric Current - Conventional and Electronic Flow, Effects of Electric Current, Electric Charges, Electric Circuit, Electric Field, Electric Force, Electricity, Electroscope, Flow of Charges (Electrons) Between Conductor, Heating Effect of Electric Current, Lightning and Lightning Safety, Structure of an Atom, Transfer of Charges, Types of Circuits: Parallel Circuit, Types of Circuits: Series Circuit, Types of Circuits: Simple Circuit

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 5: Electricity exercises

ExerciseNo. of questionsPages
Exercises3357 to 58

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 6: Sound

Concepts covered in Sound are Audibility and Range, Characteristics of a Sound Wave, Hearing Loss, Human Ear, Loudness and Intensity, Musical Instruments, Noise Pollution, Pitch (or shrillness) and frequency, Production of Sound, Propagation of Sound, Properties of Sounds, Quality (Or Timbre) and Wave Form, Sound, Sound Produced by Humans

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 6: Sound exercises

ExerciseNo. of questionsPages
Exercises3569 to 70

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 7: Magnetism

Concepts covered in Magnetism are Artificial Magnets, Classification of Magnets, Discovery of Magnets, Earth’s Magnetism, Magnet and Its Characteristics, Magnetic Field, Magnetic Materials, Magnetic Properties, Uses of Magnets

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 7: Magnetism exercises

ExerciseNo. of questionsPages
Exercises2581 to 82

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 8: Universe and Space Science

Concepts covered in Universe and Space Science are Galaxy and Its Types, Indian Scientist, Indian Space Research Organization (ISRO), India’s Space Programmes: Chandrayaan – 1, India’s Space Programmes: Chandrayaan – 2, India’s Space Programmes: Mangalyaan (Mars vehicle), Launching of Satellite, NASA Space Mission: Apollo Mission, NASA’s work with ISRO, National Aeronautics and Space Administration (NASA), Propellants and Its Types, Rockets and Its Structure, Sky Watching, Space Missions, The Solar System, Universe, Work of Indians at NASA

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 8: Universe and Space Science exercises

ExerciseNo. of questionsPages
Exercises2892 to 93

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 9: Matter around us

Concepts covered in Matter around us are Characteristics of Particles (Molecules) of Matter, Classification of Compound, Compound, Elements, Matter (Substance), Physical Properties of Metals, Physical Properties of Non-metal, States of Matter, Symbols Used to Represent Atoms of Different Elements, The Gaseous State, The Liquid State, The Solid State, Type of Elements: Metalloid, Types of Elements: Metals, Types of Elements: Non-metal

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 9: Matter around us exercises

ExerciseNo. of questionsPages
Exercises36101 to 103

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 10: Changes around us

Concepts covered in Changes around us are Classification of Change: Chemical Changes, Effects of Chemical Changes: Biological Effects, Effects of Chemical Changes: Environmental Effects, Effects of Chemical Changes: Production of Heat, Light, Sound and Pressure, Factors Determining Chemical Changes

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 10: Changes around us exercises

ExerciseNo. of questionsPages
Exercises44111 to 113

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 11: Air

Concepts covered in Air are Acid Rain, Air Around Us, Air is a Mixture, Carbon Dioxide, Components of Air: Carbon Dioxide, Components of Air: Nitrogen, Components of Air: Oxygen, Composition and Components of Air, Global Warming, Green House Effect, Importance of Carbon Dioxide, Importance of Nitrogen, Importance of Oxygen, Nitrogen Fixation, Occurrence of Nitrogen, Occurrence of Oxygen, Preventive Measures of Acid Rain, Preventive Measures of Global Warming, Preventive Measures of Green House Effect, Properties of Carbon Dioxide, Properties of Nitrogen, Properties of Oxygen

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 11: Air exercises

ExerciseNo. of questionsPages
Exercises24122 to 123

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 12: Atomic Structure

Concepts covered in Atomic Structure are Advantage and Limitations of Thomson’s Atomic Model, Advantages and Limitations of Dalton’s Atomic Theory, Atoms: Building Blocks of Matter, Balancing Chemical Equation, Chemical Equation, Chemical Formula or Molecular Formula, Dalton’s atomic theory, Different Valent Ions, Different Ways to Determine Valency, Discovery of Charged Particles in Matter, Electrons (e), Introduction of Atoms, Ions (Radicals) and Its Types, J. J. Thomson’s Atomic Model, Law of Conservation of Mass, Law of Constant Proportions (Law of Definite Proportions), Laws of Chemical Combination, Naming Chemical Compounds, Neutrons (n), Protons (p), Valency, Variable Valency

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 12: Atomic Structure exercises

ExerciseNo. of questionsPages
Exercises26136 to 137

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 13: Water

Concepts covered in Water are Advantage and Disadvantage of Hard Water, Chemical Properties of Water, Classification of water: Soft and Hard Water, Composition of Water, Electrolysis of Water, Physical Properties of Water, Potable Water, Preparation of Water, Prevention of Water Pollution, Purification of Water, Removal of Hardness of Water, Water - a Universal Solvent, Water, Our Lifeline, Water Pollution and Its Causes, Water Pollution in Tamilnadu

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 13: Water exercises

ExerciseNo. of questionsPages
Exercises36153 to 154

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 14: Acids and Bases

Concepts covered in Acids and Bases are Acids, Bases (Alkalis), Indicators, Neutralization Reactions in Our Daily Life, Properties of Acids, Properties of Bases (Alkalis), Similarities and Differences Between Acids and Bases, Types of Double Displacement: Neutralization Reaction, Uses of Acids, Uses of Bases

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 14: Acids and Bases exercises

ExerciseNo. of questionsPages
Exercises36164 to 165

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 15: Chemistry in Everyday Life

Concepts covered in Chemistry in Everyday Life are Bio-energy, Extraction of Coal, Fuel, Fuel Efficiency, Hydrocarbons, Natural Gas, Non-crystalline/Amorphous Forms: Coal, Non-crystalline/Amorphous Forms: Cock, Other Gases, Petroleum, Refining of Crude Petroleum, Solar Energy, Sources of Hydrocarbons, Types of Fuel, Wind Energy

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 15: Chemistry in Everyday Life exercises

ExerciseNo. of questionsPages
Exercises22178 to 179

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 16: Microorganisms

Concepts covered in Microorganisms are Algae, Bacteria, Fungi, Harmful Effects of Microorganisms (Microbes), Microorganisms (Microbes) and Microbiology, Prions, Protozoa, Relationship Between Man and Microbes Balances, Imbalances and Uses, Uses of Microorganisms (Microbes), Virions, Viruses

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 16: Microorganisms exercises

ExerciseNo. of questionsPages
Exercises33189 to 190

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 17: Plant Kingdom

Concepts covered in Plant Kingdom are Biodiversity, Kingdom Plantae: Angiosperms, Kingdom Plantae: Bryophytes (Mosses), Kingdom Plantae: Gymnosperms, Kingdom Plantae: Pteridophytes (Ferns), Kingdom Plantae: Thallophyta (Algae), Kingdom Plantae: Thallophyta (Fungi), Medicinal Plant, Nomenclature, Taxonomy and Systematics

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 17: Plant Kingdom exercises

ExerciseNo. of questionsPages
Exercises45202 to 203

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 18: Organisation of Life

Concepts covered in Organisation of Life are Biological Organisation in Organisms, Breathing – Respiratory Cycle, Cell: the Fundamental Unit of Life, Concept of Osmosis, Homeostasis, Human Eye: Structure of the Eye, Human Organ System, Human Respiratory System, Metabolism, Organisms Show Variety in Cell Number, Shape and Size, Osmoregulation, Osmotic Pressure, Physiological Processes in Organisms, Simple Diffusion, Tissues - “The Teams of Workers”, Types of Respiration: Aerobic and Anaerobic Respiration

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 18: Organisation of Life exercises

ExerciseNo. of questionsPages
Exercises38215 to 217

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 19: Movements in Animals

Concepts covered in Movements in Animals are Biodiversity, Human Body and Its Movements, Human Skeleton System, Joints and Its Classification, Movement and Locomotion, Movement in Different Animals, Muscles and Its Types, Muscular System, The Human Skeleton: Appendicular Skeleton, The Human Skeleton: Axial Skeleton, Types of Movements

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 19: Movements in Animals exercises

ExerciseNo. of questionsPages
Exercises40230 to 231

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 20: Reaching the Age of Adolescence

Concepts covered in Reaching the Age of Adolescence are Adolescence and Puberty, Changes at Puberty, Menstrual Cycle (Ovarian Cycle), Nutritional Needs of Adolescents, Personal Hygiene for Adolescence, Reproductive Health, Reproductive Phase of Life in Humans, Role of Hormones in Initiating Reproductive Function, Secondary Sex Characteristics

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 20: Reaching the Age of Adolescence exercises

ExerciseNo. of questionsPages
Exercises41241 to 242

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 21: Crop Production and Management

Concepts covered in Crop Production and Management are Agricultural Implements, Agriculture Research Institutions, Basic Practices of Crop Production, Bio-control Methods, Bio-indicators, Crop and Its Types, Fertilizers, Foliar Sprays, Harvesting of Crops, Irrigation, Manuring (Biomanuring), Method of Irrigation, Methods of Sowing, Methods to Replenish Nutrients in Your Soil, Rotation of Crops, Seed Bank, Soil Formation and Preparation for Agriculture, Sowing and Selection of Seed, Storage of Food Grains, Types of Irrigation, Weeding

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 21: Crop Production and Management exercises

ExerciseNo. of questionsPages
Exercises23257 to 258

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 22: Conservation of Plants and Animals

Concepts covered in Conservation of Plants and Animals are Afforestation, Animal Welfare Organisations, Biomagnification, Causes for Endangerment, Consequences of Deforestation, Conservation of Forest, Conservation of Wildlife, Deforestation and Its Causes, Endangered Species, PBR (People’s Bio-diversity Register), Red Data Book, Reforestation, Saving Endangered Species

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 22: Conservation of Plants and Animals exercises

ExerciseNo. of questionsPages
Exercises30274 to 275

### Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science (Class 8) Chapter 23: Libre Office Calc

Concepts covered in Libre Office Calc are Functions, Generate Auto Numbers, Libre Office Calc, Merge Cells, Operators in Libre Office Calc, Sorting Data, Spreadsheet, Working with Charts, Worksheet and Workbook

#### Tamil Nadu Board Samacheer Kalvi Class 8 Science (Class 8) Chapter 23: Libre Office Calc exercises

ExerciseNo. of questionsPages
Exercises10281

## Tamil Nadu Board Samacheer Kalvi Solutions for Class 8th Science Answers Guide

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## Tamil Nadu Board Samacheer Kalvi Solutions for Class 8 Science Tamil Nadu Board of Secondary Education

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