Tamil Nadu Board of Secondary EducationSSLC (English Medium) (5 to 8) Class 7

# Science SSLC (English Medium) (5 to 8) Class 7 Tamil Nadu Board of Secondary Education Syllabus 2024-25

Tamil Nadu Board of Secondary Education Syllabus 2024-25 Class 7: The Tamil Nadu Board of Secondary Education Class 7 Science Syllabus for the examination year 2024-25 has been released by the , Tamil Nadu Board of Secondary Education. The board will hold the final examination at the end of the year following the annual assessment scheme, which has led to the release of the syllabus. The 2024-25 Tamil Nadu Board of Secondary Education Class 7 Science Board Exam will entirely be based on the most recent syllabus. Therefore, students must thoroughly understand the new Tamil Nadu Board of Secondary Education syllabus to prepare for their annual exam properly.

The detailed Tamil Nadu Board of Secondary Education Class 7 Science Syllabus for 2024-25 is below.

## Tamil Nadu Board of Secondary Education Class 7 Science Revised Syllabus

Tamil Nadu Board of Secondary Education Class 7 Science and their Unit wise marks distribution

## Syllabus

### Tamil Nadu Board of Secondary Education Class 7 Science Syllabus for Chapter 1: Term - 1

1.1 Measurement
• Measurements
• Measurement
• The need for measurement in daily life
• Physical Quantities
• Physical Quantities
• Types of Physical Quantities
1. Fundamental Quantities
2. Derived quantities
3. Scalar quantities
4. Vector Quantities
• Area and It’s Unit
• Measurement of Area
• Volume and It’s Unit
• Vessels for Measuring the Volume
• Measurement of Volume
• Density and It’s Unit
• Density
• Unit of Density
• Relationship between S.I. and C.G.S. units
• Density of a Substance in Its Different States
• Measuring Larger Distances
• Astronomical unit
• Light year
• Parsec
1.2 Force and Motion
• Distance and Displacement
• Distance
• Displacement
• Distinction between Distance and Displacement
• Speed
• Speed
• Formula of Speed
• Unit of Speed
• Examples of Speed
• Types of Speed
• Types of Speed
1. Uniform Speed
2. Non-Uniform speed
3. Instantaneous Speed
4. Average Speed
• Velocity
• Velocity
• Formula of Velocity
• Unit of Velocity
• Examples of Velocity
• Types of Velocity
• Types of Velocity
1. Uniform Velocity
2. Non-Uniform Velocity
3. Instantaneous Velocity
4. Average Velocity
• Acceleration and Retardation
• Acceleration
• Formula of Acceleration
• Unit of Acceleration
• Relation for acceleration
• Types of Acceleration
• Types of Acceleration
1. Positive acceleration
2. Negative acceleration or Deceleration or Retardation
3. Uniform acceleration
4. Variable acceleration
• Graphical Representation of Motion
• Displacement - Time Graph Or Distance - Time Graph
• Distance-time graph for uniform motion
• Distance-time graph for non-uniform motion
• Velocity - Time Graphs
• Velocity-time graph for uniform velocity
• Velocity-time graph for uniform acceleration
• Comparison Between Distance – Time and Speed – Time Graphs
• Centre of Gravity
• Centre of Gravity
• Centre of gravity of some regular uniform objects
• Centre of gravity and the balance point
• Determination of centre of gravity of an irregular lamina by the method of balance using a plumb line
• Real-Life Applications of Centre of Gravity
• Equilibrium of Bodies and Its Types
• Equilibrium of bodies (Stability)
• Kind of Equilibrium
1. Static equilibrium
2. Dynamic equilibrium
3. Stable equilibrium
4. Unstable equilibrium
5. Neutral equilibrium
• Conditions for equilibrium
1.3 Matter Around Us
1.4 Atomic Structure
• Introduction of Atoms
• Atoms: Building Blocks of Matter
• Atoms: Building Blocks of Matter
• How big are atoms?
• How do atoms exist?
• Dalton’s atomic theory
• Advantages and Limitations of Dalton’s Atomic Theory
• J. J. Thomson’s Atomic Model
• Advantage and Limitations of Thomson’s Atomic Model
• Lord Rutherford’s Atomic model
• Biography of Ernest Rutherford
• Reason behind discovery of Rutherford’s atomic model
• Rutherford’s α-particle scattering experiment
• Observations of α-scattering experiment
• Conclusions of α-scattering experiment
• Rutherford's model of an atom
• Some terminologies related to the α- scattering experiment
1) Number of scattered particles
2) Distance of closest approach (Nuclear dimension)
3) Impact parameter (b)
• Limitations of Rutherford’s Atomic Model
• Structure of an Atom
• Atomic Number (Z), Mass Number (A), and Number of Neutrons (n)
• Atomic number or Nuclear charge
• Nucleons
• Mass number
• Relationship between atomic number and mass number
• Representation of element
• Number of Neutrons (n)
• Valency
• Isotopes
• Isotopes
• Examples
• Properties of Isotopes
• Mass of Isotopes
• Isobars
• Isobars
• Example of Isobars
• Characteristics of Isobars
1.5 Reproduction and Modification in Plants
1.6 Health and Hygiene
• Hygiene
• Types of Hygiene: Personal Hygiene
• Personal Hygiene
• Major aspect of personal hygiene
1. Cleanliness
2. Physical exercise
3. Rest and sleep
4. Healthy habits
• Types of Hygiene: Public Hygiene (Community)
• Effective Ways to Maintain Good Health
• Disease
• Diseases
• Identification of disease
• Communicable Or Infectious Diseases
• Communicable or Infectious diseases
• Causes of Communicable or Infectious diseases
• Communicable examples
• Incubation period
• Common Diseases in Human Beings
• Bacterial Diseases
• Bacterial diseases in human beings
• Typhoid ( Enteric fever)
• Pneumonia
• Shigellosis (Bacillary dysentery)
• Bubonic plague (Black death)
• Diphtheria
• Cholera
• Tetanus (Lock jaw)
• Tuberculosis
• Syphilis
• Whooping cough (Pertussis)
• Dysentery
• Plague
• Viral Diseases
• Viral diseases in human beings
• Common cold
• Mumps
• Measles
• Viral hepatitis
• Chickenpox
• Poliomyelitis
• Dengue fever (Break bone fever)
• Chikungunya
• Non-communicable or Non-infectious Diseases
• Non-communicable or Non-infectious diseases
• Causes of Non-infectious diseases
• Non-communicable examples
• Specific Health Problems of Children: Anaemia
• First Aid and Emergency Action
• First Aid kit
1.7 Visual Communication
• File and Folder
• Creating Files
• Visual Communication Devices
• Photo Gallery and Photostory
• Graphics and Animation
• Dimensional and 3 Dimensional Images

### Tamil Nadu Board of Secondary Education Class 7 Science Syllabus for Chapter 2: Term - 2

2.1 Heat and Temperature
• Temperatures
• Temperature
• Unit of Temperature
• Measuring Temperature
• Thermometer and Its Types
• Scales of Thermometers
1. Fahrenheit scale
2. Celsius temperature scale
3. Kelvin scale (Absolute scale)
• Relationship between the three scales of temperature
• Conversion of Temperature from celsius scale to kelvin scale and vice-versa
• Numerical Problems of Heat
2.2 Electricity
• Electricity
• Electric Current
• Electric Current
• Unit of Electric Current
• Measurement of electric current
• Example of Electric Current
• Direction of the Electric Current - Conventional and Electronic Flow
• Potential and Potential Difference
• Potential and Potential Difference
• Unit of electric potential and potential difference
• Difference between Electric Potential and Potential Difference
• Potential difference of a cell
• Relation between electric intensity potential difference
• Electrical Resistivity and Electrical Conductivity
• Electrical Resistivity
• Unit of specific resistance
• Factors affecting the specific resistance
• Conductance and Conductivity
• Resistance (R)
• Resistance (R)
• Cause of resistance
• Factors affecting the resistance of a conductor
• Analogy of Electric Current with Water Flow
• Electro Chemical Cells
• Electric Cell
• Electric Cell
• Types of Cell: Primary Cells and Secondary Cells
1. Dry Cell
3. Ni-Cd cell
• Difference between primary cell and secondary cell
• Battery
• Connecting cells
• Electric Switch
• Switch
• Switches in two groups
• Reason for connecting the switch in the live wire
• Safety precaution while using a switch
• Electric Circuit
• Electric circuit
• Circuit Diagram
• The flow of electricity in a circuit
• Arrangement of Circuits: Open Circuit and Closed
• Types of Circuits: Series Circuit
• Types of Circuits: Parallel Circuit
• Similarity and Difference Between Series and Parallel Circuit
• Precautions to Be Taken While Using Electricity
• Conductors and Insulators
• Conductors
• Insulators (Non-Conductors)
• Effects of Electric Current
• Effects of Electric Current
1. Heating effect of Electric Current
2. Magnetic effect (Magnetism) of Electric Current
3. Chemical effect of Electric Current
• Heating Effect of Electric Current
• Heating effect of electric current
• Factors affecting Heating Effect of current
• Applications of Heating Effect of electric current
• Electric Heating Device
1. Fuse Wire
2. Filament in bulbs
3. Electric kettles
4. Electric cookers
5. Electric irons
• Magnetic Effect of Electric Current
• Magnetic effect of current
• Application of Magnetic effect of electric current
1. Electromagnet
2. Electric Bell
3. Telephone
• Oersted's experiment on the magnetic effect of electric current
• Chemical Effects of Electric Current
• Chemical effect of electric current
• Application of Chemical effect of electric current
1. Electroplating
2.3 Changes Around Us
• Change
• Effect of Heat on Solid, Liquid and Gases
• Classification of Change: Physical Changes
• Change of State of Matter
• Concept of Melting (Fusion)
• Melting (Fusion)
• Melting point
• Latent heat
• Latent heat of fusion
• Heating curve of ice during melting
• Change in volume on melting
• Effect of pressure on the melting point
• Effect of impurities on the melting point
• Concept of Boiling (Vaporization)
• Boiling (Vaporization)
• Boiling point
• Latent heat
• Latent heat of Vaporization
• The heating curve for water
• Change in volume on boiling
• Effect of pressure on the boiling point
• Effect of impurities on the boiling point
• Concept of Freezing (Solidification)
• Freezing (Solidification)
• Freezing point
• Concept of Condensation (Liquefaction)
• Concept of Sublimation
• Concept of Desublimation (Deposition)
• Concept of Evaporation
• Factors Affecting Evaporation
• How does Evaporation cause cooling?
• Methods of Separation
• Crystallisation Method
• Classification of Change: Chemical Changes
• Chemical Change
• Properties of Chemical Change
• Importance of Chemical Change
• Effects of Chemical Changes: Biological Effects
• Effects of Chemical Changes: Environmental Effects
• Factors Determining Chemical Changes
• Indicators of a Chemical Change (Chemical Reaction)
• Energy Change in Chemical Reactions
• Energy Change in Chemical Reactions:
1. Exothermic Chemical Changes
2. Endothermic Chemical Changes
3. Photochemical Reaction
4. Electrochemical Reaction
• Classification of Change: Periodic and Non-periodic Changes
2.4 Cell Biology
• Cell: the Fundamental Unit of Life
• Cell
• Totipotency
• Experiment: Microscopic examination of onion peel.
• Unicellular and Multicellular Organism
• Cell to Organism
• Plant Cell and Animal Cell
• Structure of a Cell
• Structure of a Cell
• Organ and Organelle
• Plasma Membrane
• Semi-permeable Membrane (Cell Membrane)
• Cell Wall - “Supporter and Protector”
• Cytoplasm - “Area of Movement”
• Mitochondria - “Power House of the Cell”
• Plastids
• Plastids
• Leucoplasts
• Chromoplasts
• Chloroplast - “Food Producers”
• Golgi Apparatus - "The delivery system of the cell"
• Lysosome - “Suicidal Bag”
• Centrosome and Centrioles
• Endoplasmic Reticulum (ER)
• Nucleus - “Brain” of the Cell
• Nuclear Membrane
• Nucleoli
• Nucleoplasm
• Chromatin fibres
• Experiment: An experiment on amoeba to show that the nucleus is essential for a normal life.
• Protoplasm
2.5 Basis of Classification
• Biodiversity
• Biodiversity
• Type of biodiversity
(i) Genetic diversity
(ii) Species diversity
(iii) Ecosystem diversity
• Global biodiversity and a proportionate number of species of major taxa of plants, invertebrates and vertebrates
• Biological Classification
• Biological classification
• Dichotomous key
• Features of dichotomous key
• Dichotomy of Animals
• New Criteria for Basis of Classification
• Levels of organisation
• Cellular level of organisation
• Tissue level of organisation
• Organ system level of organisation
• Diploblastic and Triploblastic organisation
• Patterns of symmetry
• Coelom
• Segmentation and Notochord
• Classification
• Classification
• Why do we classify things?
• Need for Classification
• Taxonomic Hierarchy of Living Organisms: Unit of Classification
• Taxonomic Hierarchy of Living Organisms
1. Species
2. Genus
3. Family
4. Order
5. Class
6. Phylum
7. Kingdom
• Five Kingdom Classification
• Five kingdom classification
• Merits of five kingdom classification
• Demerits of five kingdom classification
• Kingdom Monera
• Kingdom Monera
• Bacteria
• Characteristic features of Kingdom Monera
• Structure of a bacterium cell
• Kingdom Protista
• Kingdom Protista
• Characteristics of Kingdom Protista
• Kingdom Fungi
• Kingdom Fungi
• Characteristics of Fungi
• Kingdom Plantae
• Kingdom Plantae
• Characteristics of Kingdom Plantae
• Kingdom Plantae: Thallophyta (Algae)
• Kingdom Plantae: Bryophytes (Mosses)
• Kingdom Plantae: Pteridophytes (Ferns)
• Kingdom Plantae: Angiosperms
• Kingdom Plantae: Gymnosperms
• Kingdom Animalia
• Kingdom Animalia
• Characteristics of Kingdom Animalia
• Invertebrate: Phylum Nematoda
• Chordata: Vertebrata
• Class - Cyclostomata
• Class - Pisces
• Class - Amphibia
• Class - Reptilia
• Class - Aves
• Class - Mammalia
• Phanerogams: Flowering Plants
• Phanerogams
• Types of Phanerogams
• Gymnosperm
• Angiosperms
• Comparison of Gymnosperm with Angiosperms
• Non Chordates (Invertebrata)
• Phylum: Porifera
• Phylum: Cnidaria/Coelenterata
• Phylum: Platyhelminthes
• Phylum: Aschelminthes
• Phylum: Annelida
• Phylum: Arthropoda
• Phylum: Mollusca
• Phylum: Echinodermata
• Phylum: Hemichordata
• Chordata: Vertebrata
• Subphylum: Prochordata
• Invertebrata and Vertebrata
• Non Chordates (Invertebrata)
• Chordates
• Chordata: Prochordata
• Chordata: Vertebrata
• Comparison of chordates and non-chordates
• Nomenclature
• Taxonomy and Systematics
• Taxonomy
• Systematics
• Classification of Taxonomy
1. Plant Taxonomy
2. Animal Taxonomy
2.6 Digital Painting
• Tux Paint
• Tux Math

### Tamil Nadu Board of Secondary Education Class 7 Science Syllabus for Chapter 3: Term - 3

3.1 Light
• Light
• Luminous and Non-luminous Bodies
• Sources of Light
• Rectilinear Propagation of Light
• A Pinhole Camera
• Reflection of Light
• Reflection of Light
• How do we see an object?
• Terms Used in Reflection of Light
• Terms used in reflection of light
• Is there any relationship between the incident ray and the reflected ray?
1. Incident ray
2. Point of incidence
3. Reflected ray
4. Normal
5. Angle of incidence
6. Angle of reflection
7. Angle of deviation
8. Plane of incidence
9. Plane of reflection
10. Glancing angle
• Law of Reflection of Light
• Types of Reflection
• Types of Reflection
1. Regular reflection
2. Irregular reflection
• Some Important Terms Related to Light
• Speed of Light
• Speed of light
• Speed of light in different mediums
• Eclipses
• Lateral Inversion
• Formation of Image by Reflection: Real and Virtual Image
• Formation of Image by Reflection
1. Real Image
2. Virtual Image
3. Distinction between a real and a virtual image
• Prism
• Dispersion of Light Through Prism and Formation of Spectrum
• Dispersion Of Light through Prism
• Newton's Experiment
• Formation of Rainbow
• Newton Disc
• Spectrum
• Cause of dispersion of white light and formation of spectrum
• Angular dispersion (Δ)
• Dispersive power (ω)
• Dispersion without deviation
• Deviation without dispersion
• Colour
3.2 Universe and Space
• Sky Watching
• Geo Centric Theory
• Epicycle Model
• Heliocentric Model
• Universe
• Galaxy and Its Types
• Constellation
• Moon and Its Phases
• Stars and Its Types
• Other Bodies of the Solar System
• Satellites
• Dwarf planets
• Asteroids
• A comet
• A meteor
• Indian Space Research Organization (ISRO)
• India’s Space Programmes: Chandrayaan – 1
• India’s Space Programmes: Mangalyaan (Mars vehicle)
• India’s Space Programmes: Chandrayaan – 2
• Telescope
• Telescope
• Types of Telescope
1) Optical Telescope
• The Missile Man of India: A.P.J. Abdul Kalam (1931-2015)
• Indian Scientist
3.3 Polymer Chemistry
• Polymer Chemistry: Polymer
• Fibre
• Fabrics
• Plant Fibres: Cotton
• Plant Fibre: Jute Fibre
• Animal Fibres: Wool
• Animal Fibre: Silk
• Man-made Fibre: Polyester and Acrylic
• Types of Plastics
• Identifying Different Types of Plastics: Resin Codes
• Harmful Effects of Plastics
• Recycling of Plastic
• Plastic Eating Bacteria
• Glass
• Glass
• Production of Glass
• Properties of Glass
• Effect of Glass on Environment
• Types of Glass
3.4 Chemistry in Daily Life
• Pharmaceutical Chemistry
• Oral Rehydration Solution (ORS)
• Antacid
• Antibiotics
• Antibiotic
• Discovery of Penicillin
• Sources of antibiotics
• Uses of antibiotics
• Analgesics
• Antipyretic
• Antiseptics and Disinfectants
• Antiseptics
• Disinfectants
• Differences between antiseptics and disinfectants
• Antihistamine
• Combustion
• Types of Combustion
• Flame
• How Do We Control Fire?
• Fire Extinguisher
3.5 Animals in Daily Life
• Biodiversity
• Biodiversity
• Type of biodiversity
(i) Genetic diversity
(ii) Species diversity
(iii) Ecosystem diversity
• Global biodiversity and a proportionate number of species of major taxa of plants, invertebrates and vertebrates
• Animal Products used as Food
• Animal Husbandry (Livestock)
• Poultry Farming
• Poultry Farming
• Poultry Feeding
• Poultry Disease
• Poultry product
• Uses of Poultry Farming
• Poultry management
• Animal Products Used as Clothing
• Animal Fibres: Wool
• Animal Fibre: Silk
• Hazards in Silk and Wool Industry
• Animal Protection and Maintenance
3.6 Visual Communication
• Libreoffice
• Components of Libreoffice
• Text Document