Science CBSE Homework Assignments

Class 7

  1. Nutrition in plants

    1. Photosynthesis and Nutrition

    2. Modes of nutrients and Symbiotic relationship

  2. Nutrition in animals

    1. Digestive system and buccal cavity

    2. Salivary glands, Intestines and Stomach

    3. Digestion in herbivores and amoeba

  3. Heat

    1. Temperature measurement

    2. Types of thermometer

    3. Heat flow and heat transfer

    4. Convection and radiation

  4. Acids, bases and salts

    1. Acids

    2. Acids & Bases

    3. Litmus paper and colour change

    4. Neutralisation

  5. Physical and chemical changes

    1. Changes in reaction

    2. Changes - Physical & chemical

    3. Rusting and changes

    4. Rusting & Crystallisation

  6. Respiration in organisms

    1. Respiration types

    2. Inhalation and Exhalation

    3. Respiration in organisms

    4. Respiration in plants

  7. Transportation in animals and plants

    1. Bood and blood vessels

    2. Heart - structure and function

    3. Excretion and transportation

    4. Transport system and absorption

  8. Reproduction in plants

    1. Types of reproduction

    2. Vegetative propagation

    3. Pollination and fertilization

    4. Seed dispersal and Post fertilization

  9. Motion and time

    1. Motion and determination of speed

    2. Time period

    3. Units of time and speed

    4. Distance-Time graph

    5. Scale variation

  10. Electric current and its effects

    1. Basics of electric current

    2. Circuit diagram

    3. Heating effect in appliances

    4. Magnetic effect on current

    5. Electromagnets

  11. Light

    1. Path and reflection of light

    2. Image formation and mirrors

    3. Formation of images in different mirrors

    4. Types of lens

    5. Image formation and splitting of colours

  12. Forests: Our life line

    1. Forests and the importance

    2. Role and components of forest

    3. Deforestation and dynamic entity of forest

  13. Waste water story

    1. Sewage & wastewater

    2. Treatement of waste water

    3. Waste disposal and house keeping

    4. Drainage system and sanitation

Class 8

  1. Crop Production & Management

    1. Crop seasons and Production

    2. Land, fertilizers and manures

    3. Irrigation and weeding

    4. Harvesting and storage

  2. Microorganisms: Friend and Foe

    1. Different types of microbes

    2. Bacteria, Algae and Fungi

    3. Applications of microbes

    4. Food preservation

    5. Nitrogen fixation

    6. Diseases by microbes

    7. Vector borne and STD's

    8. Diseases in animals, plants and Antibiotics

    9. Immunisation

  3. Coal and petroleum

    1. Man-made and natural resources

    2. Formation of fossil fuels

    3. Uses of coal

    4. Petroleum

    5. Natural gas

  4. Combustion and flame

    1. Fire and combustion

    2. Kinds of combustion

    3. Different kinds of combustion

    4. Efficiency of fuel

    5. Classes of fire

  5. Conservation of plants and animals

    1. Deforestation

    2. Deforestation - Effects

    3. Biosphere reserve

    4. Sanctuary and Parks

    5. Endangered and extinct organisms

    6. Migration and red book

    7. Reforestation

  6. Reproduction in animals

    1. Reproduction

    2. Reproductive organs

    3. Fertilisation and embryo development

    4. Viviparous and Oviparous animals

    5. Metamorphosis

    6. Asexual reproduction

    7. Cloning

  7. Reaching the age of adolescence

    1. Adolescence and Puberty

    2. Changes during puberty

    3. Sexual characteristics and hormone

    4. Hormones and Reproductive phase

    5. Sex determination

    6. Endocrine hormones

    7. Factors influencing reproductive health

  8. Force and pressure

    1. Force - Introduction

    2. Effects of force

    3. Results of force

    4. Contact & non-contact force

    5. Magnets & Pressure

    6. Nature of pressure

    7. Atmospheric pressure

  9. Friction

    1. Nature of friction

    2. Types of friction

    3. Aspects of friction

    4. Aspects of friction in different cases

    5. Rolling friction

  10. Sound

    1. Basics of sound

    2. Propagation of sound

    3. Amplitude and frequency

    4. Time period and characters of sound

    5. Characteristics of sound

    6. Audible and inaudible sounds

    7. Music and noise

  11. Chemical effects of electric current

    1. Conductivity of liquids

    2. Conductivity by liquids and Conductors

    3. Conductors & magnetic deflection

    4. Evolution of gas and changes in colour

    5. Electroplating process

  12. Some natural phenomena

    1. Natural phenomena - Introduction

    2. Charged objects

    3. Transfer of charges and lightning

    4. Lightning and earthquake

    5. Seismograph

  13. Light

    1. Introduction to light

    2. Image formation

    3. Ray of light

    4. Principle of multiple reflection

    5. Structure of human eye

    6. Functioning of eye

    7. Protection of eyes and Braille system

Class 9

  1. Matter in our surroundings

    1. Classification & states of matter

    2. Types of state and its characteristics

    3. Temperature scales and Separation of mixture

  2. Is matter around us pure?

    1. Classification of matters

    2. Pure and impure substances

    3. Mixture and compound

    4. Solutions

    5. Colloidal solutions and its properties

    6. Mass percentage

    7. Physical and chemical changes

  3. Atoms and molecules

    1. Atom, molecule and element

    2. Atomic theory

    3. Atomic mass

    4. Atomicity of molecules

    5. Ion and ionization

    6. Law of chemical combination

    7. Law of conservation of mass

    8. Mole concept

    9. Molecular mass

    10. Molecular mass

    11. Symbols of elements

    12. Writing chemical formulae

    13. Valency

  4. Structure of the atom

    1. Thomson's and Rutherford's Model

    2. Bohr's Model

    3. Electronic configuration

    4. Valency

    5. Atomic number

    6. Atomic number and Mass number

    7. Subatomic particles

    8. Isotops, Isobars and isotones

  5. The fundamental unit of life

    1. Discovery of cell

    2. Cell size, shape and number

    3. Types of cells

    4. Plasma membrane and transportation

    5. Components of cell

    6. Cell organelles I

    7. Cell organelles II

  6. Tissues

    1. Classification of tissues

    2. Meristematic and protective tissue

    3. Simple permanent tissue

    4. Complex permannet tissue

    5. Epithelial tissue

    6. Connective tissues

    7. Muscular and nervous tissue

    8. Types of animal tissues

  7. Motion

    1. Types of motion, distance and displacement

    2. Speed and Velocity

    3. Acceleration

    4. Distance-Time and Velocity-Time graphs

    5. Equation of motion

    6. Circular motion

  8. Force and Laws of motion

    1. Introduction to force

    2. Types of force and laws of motion

    3. Law of inertia and momentum

    4. Second law of motion I

    5. Second law of motion II

    6. Third law of motion

    7. Law of conservation of momentum

  9. Gravitation

    1. Law of gravitation

    2. Gravitation force

    3. Free fall

    4. Mass and Weight of the object

    5. Pressure calculation

    6. Floatation of objects

  10. Work and Energy

    1. Basics of work done and problems

    2. Work done - problems

    3. Basics of power

    4. Basics of energy

    5. Different forms of energy

    6. Kinetic and potential energy

  11. Sound

    1. Basics of sound and vibrating objects

    2. Types of wave

    3. Types of wave II

    4. Characteristics of wave

    5. Characteristics of wave II

    6. Property of sound and echo

    7. Reflection of sound

    8. Range of waves

    9. SONAR

    10. SONAR & Structure of human ear

  12. Improvement in food resources

    1. Crop seasons and crop production management

    2. Manure and Fertilisers

    3. Management of nutrients

    4. Irrigation

    5. Cropping patterns and Infestation

    6. Farm management in cattles

    7. Farming of poultry

    8. Production of fish

    9. Apiculture or Bee-keeping

Class 10

  1. Chemical reaction and equations

    1. Chemical reaction

    2. Balancing chemical equation

    3. Types of chemical reaction

    4. Endothermic, exothermic reaction and rancidity

    5. Combination

    6. Decomposition

    7. Displacement

    8. Redox reaction

  2. Acids, Bases and Salts

    1. Introduction to acids and bases

    2. Indicators and reactions

    3. Properties and behavior of acids and bases

    4. Importance of pH and salts

    5. Water of crystallization and Plaster of Paris

    6. Acids, Bases and Salts

    7. Acids, Bases and Salts

  3. Metals and Non-Metals

    1. Categorisation, properties of metals and non-metals

    2. Chemical properties of Metals

    3. Extraction of metals

    4. Metal Extraction and Refining

    5. Reactivity Series

    6. Ionic compounds and their properties

    7. Corrosion

    8. Formation of metal oxide

  4. Carbon and its compound

    1. Characteristics of hydrocarbons

    2. Classification of organic compounds

    3. Classification of organic compounds based on functional groups

    4. Ethanoic acid

    5. Ethanol

    6. Homologous series and its characteristics

    7. Isomerism and allotropes

    8. IUPAC Nomenclature of organic compounds

    9. Nomenclature of organic compounds

    10. Properties of carbon compounds

    11. Soaps and detergents

    12. Special features of Carbon

  5. Life Process

    1. Growth and movement

    2. Tropism and metabolism

    3. Nutrition

    4. Photosynthesis and transpiration

    5. Respiration

    6. Transportation

    7. Reproduction

    8. Digestive system

    9. Circulatory system

    10. Excretory system

  6. Control and coordination

    1. Nervous system

    2. Human brain

    3. Structure of neuron

    4. Conduction of nerve impulse

    5. Reflex action and reflex arc

    6. Receptors

    7. Plant hormones

    8. Tropism in plants

    9. Endocrine system

  7. How do organisms reproduce?

    1. Reproduction by spores

    2. Artificial methods of contraception

    3. Asexual reproduction

    4. Feertilisation in plants

    5. Female reproductive system

    6. Female, male accessory organs and glands and secondary sexual characteristics

    7. Male reproductive system

    8. Menstrual cycle

    9. Polination and their types

    10. Reproduction

    11. Reproduction and their types

    12. Reproduction in plants

    13. Reproductive health

    14. Sexual reproduction

    15. Sexual reproduction in plants

    16. Tissue culture

    17. Underground stem propagation

    18. Variation in reproduction

    19. Vegetative propagation and its types

  8. Heredity

    1. Dihybrid experiment

    2. Genetics : In general

    3. Gregor Johann Mendel - Father of genetics

    4. How do traits get expressed

    5. Laws of Mendel

    6. Monohybrid cross

    7. Phenotype and genotype

    8. Sex determination

    9. Variation

  9. Light reflection and refraction

    1. Basics of light and mirror

    2. Spherical mirrors

    3. Applications & image formation by spherical mirrors

    4. Image formation by spherical mirrors

    5. Mirror equation and Refraction basics

    6. Refraction

    7. Refractive index

    8. Image formation by spherical lens

    9. Spherical lenses

    10. Magnification and Power of lens

  10. The human eye and colourful world

    1. Structure of human eye

    2. Defects in eye

    3. Functions of eye

    4. Power of lens

    5. Refraction of light

    6. Refraction of light through glass prism

    7. Scattering of light

    8. Dispersion of light and atmospheric refraction

  11. Electricity

    1. Basics of electricity

    2. Electric current and Potential difference

    3. Basics of electric circuit, current and power

    4. Ohm's law and Resistance calculation

    5. Resistance and current calculation

    6. Resistivity, conductivity and effective resistance

    7. System of resistors

    8. Combination of resistors & Power dissipation

    9. Heating effects, Power and Energy

  12. Magnetic effects of electric current

    1. Introduction to electro magnetism

    2. Magnetic fields

    3. Current carrying conductor

    4. Current carrying circular coil

    5. Solenoid

    6. Force on a current carrying conductor & Domestic circuits

  13. Our environment

    1. Biological magnification

    2. Classification of ecosystems

    3. Components of ecosystem

    4. Energy flow in the ecosystem

    5. Food chain and trophic levels

    6. Ozone depletion

    7. Ozone layer depletion

    8. Waste management

    9. Wastes and classification of wastes

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