General Science | Class 8

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    Chapter 1 Human Organ System ( 16 videos)  (Practice Test)

      1.1: Human Nervous System (Practice Test)
      Nervous System
    1. Nervous System
      455 views
      2. Neuron
    2. Neuron
      639 views
      3. Neuron Types
    3. Neuron Types
      10302 views
      4. Human Nervous System (Brain)
    4. Human Nervous System (Brain)
      396 views
      5. Brain
    5. Brain
      714 views
      6. Peripheral Nervous System (PNS)
    6. Peripheral Nervous System (PNS)
      6602 views
      7. Working Model of The Nervous System
    7. Working Model of The Nervous System
      110 views
      8. Actions Controlled By The Nervous System
    8. Actions Controlled By The Nervous System
      33 views
      1.2: Reflex Action (Practice Test)
      Reflex Action
    1. Reflex Action
      10745 views
      1.3: Excretion (Practice Test)
      Excretory System
    1. Excretory System
      7212 views
      2. Structure of Kidney
    2. Structure of Kidney
      87 views
      3. Nephron
    3. Nephron
      11277 views
      4. Role of Kidney
    4. Role of Kidney
      27826 views
      1.4: Malfunctioning of Kidneys (Practice Test)
      Formation of Stones in Kidney
    1. Formation of Stones in Kidney
      4168 views
      2. Renal Failure
    2. Renal Failure
      13435 views
      3. Treatment of Malfunctioned Kidneys
    3. Treatment of Malfunctioned Kidneys
      2333 views

    Chapter 2 Heredity in Organisms ( 12 videos)  (Practice Test)

      2.1: Cell Division (Practice Test)
      Cell Cycle
    1. Cell Cycle
      20785 views
      2. Mitosis, Prophase
    2. Mitosis, Prophase
      30609 views
      3. Metaphase I, Anaphase I and Telophase I
    3. Metaphase I, Anaphase I and Telophase I
      15853 views
      4. Difference Between Mitosis And Meiosis
    4. Difference Between Mitosis And Meiosis
      152 views
      2.2: Heredity
      Heredity
    1. Heredity
      2.3: Basis of Heredity (Practice Test)
      Chromosomes, Genes and DNA
    1. Chromosomes, Genes and DNA
      14952 views
      2. Watson-Crick Model of DNA
    2. Watson-Crick Model of DNA
      65841 views
      3. Transmission of Characters (Inheritable And Non-inheritable Characters)
    3. Transmission of Characters (Inheritable And Non-inheritable Character
      29 views
      4. Relate Variation And Competition
    4. Relate Variation And Competition
      5. Artificial Selection
    5. Artificial Selection
      9753 views
      6. Replication of DNA
    6. Replication of DNA
      16059 views
      7. Gene and Genome, Chromosome, Chromatin
    7. Gene and Genome, Chromosome, Chromatin
      11553 views

    Chapter 3 Biotechnology ( 9 videos)  (Practice Test)

      3.1: DNA Replication (Practice Test)
      Introduction To Biotechnology
    1. Introduction To Biotechnology
      202 views
      2. Genetic Engineering
    2. Genetic Engineering
      190 views
      3.2: Introduction of Gene into Bacterium (Practice Test)
      Using Bacteria in Genetic Engineering
    1. Using Bacteria in Genetic Engineering
      27401 views
      2. Introduction of Genes Into Bacterium
    2. Introduction of Genes Into Bacterium
      120 views
      3.3: Genetic Modifications
      Genetic Modifications
    1. Genetic Modifications
      89 views
      3.4: Applications of Biotechnology (Practice Test)
      Role of Biotechnology In Agriculture, Food Production And Preservation
    1. Role of Biotechnology In Agriculture, Food Production And Preservation
      135 views
      2. Role of Biotechnology In Health And Environment
    2. Role of Biotechnology In Health And Environment
      127 views
      3. Production of Insulin From Genetically Modified Bacterium
    3. Production of Insulin From Genetically Modified Bacterium
      198 views
      4. Production of Vaccines From Genetically Modified Bacterium
    4. Production of Vaccines From Genetically Modified Bacterium
      28 views

    Chapter 4 Pollutants and Their Effects on Environment ( 29 videos)  (Practice Test)

      4.1: Sources, Properties and Effects of Air Pollutants (Practice Test)
      Introduction to Pollution
    1. Introduction to Pollution
      492 views
      2. Sources of Air Pollutants
    2. Sources of Air Pollutants
      2311 views
      3. Carbon Monoxide as Pollutant
    3. Carbon Monoxide as Pollutant
      3165 views
      4. Pollutants of Sulphur Compound
    4. Pollutants of Sulphur Compound
      1880 views
      5. Ground Level Ozone And Heavy Metals As Air Pollutants
    5. Ground Level Ozone And Heavy Metals As Air Pollutants
      6. Harmful Effects of Air Pollutants
    6. Harmful Effects of Air Pollutants
      33 views
      7. Problems Caused by Pollutants in Humans
    7. Problems Caused by Pollutants in Humans
      8. Components of Ecosystem
    8. Components of Ecosystem
      5633 views
      9. Habitat
    9. Habitat
      441 views
      10. Factors Causing Changes In A Habitat
    10. Factors Causing Changes In A Habitat
      70 views
      11. Factors Causing Changes In A Habitat (Continued)
    11. Factors Causing Changes In A Habitat (Continued)
      26 views
      12. Ecology
    12. Ecology
      2941 views
      13. Competition
    13. Competition
      14. Predation
    14. Predation
      1093 views
      15. Mutualism
    15. Mutualism
      1669 views
      16. Commensalism, Grazing
    16. Commensalism, Grazing
      1221 views
      17. Symbiosis
    17. Symbiosis
      3557 views
      4.2: Effects of Human Activities on Environment (Practice Test)
      Green House Effect
    1. Green House Effect
      5647 views
      2. Depletion of Ozone
    2. Depletion of Ozone
      6088 views
      3. Global Warming
    3. Global Warming
      4039 views
      4. Acid Rain
    4. Acid Rain
      6450 views
      5. Deforestation
    5. Deforestation
      32 views
      6. Lack of Natural Resources
    6. Lack of Natural Resources
      16 views
      4.3: Saving the Earth (Practice Test)
      Solid Waste Management
    1. Solid Waste Management
      39 views
      2. Ways of savings Ours Surroundings
    2. Ways of savings Ours Surroundings
      88 views
      3. The Environment and 3R's
    3. The Environment and 3R's
      4. The Nitrogen Cycle
    4. The Nitrogen Cycle
      5. Carbon Cycle
    5. Carbon Cycle
      9649 views
      6. Carbon Sinks, The Role of Oceans And Forests As Carbon Sinks
    6. Carbon Sinks, The Role of Oceans And Forests As Carbon Sinks

    Chapter 5 Chemical Reactions ( 19 videos)  (Practice Test)

      5.1: Chemical Reactions (Practice Test)
      Introduction To Chemical Reactions
    1. Introduction To Chemical Reactions
      5.2: Chemical Equation and its Balancing (Practice Test)
      Chemical Equation and Writing of Chemical Equation
    1. Chemical Equation and Writing of Chemical Equation
      1466 views
      2. Balancing of Chemical Equation
    2. Balancing of Chemical Equation
      3606 views
      3. Applications of Chemical Reactions
    3. Applications of Chemical Reactions
      50 views
      4. Reactions of the Alkali Metals
    4. Reactions of the Alkali Metals
      262 views
      5. Balancing the Equations and Identifying Types of Reaction
    5. Balancing the Equations and Identifying Types of Reaction
      1013 views
      5.3: Law of Conservation of Mass (Practice Test)
      Law of Conservation of Mass
    1. Law of Conservation of Mass
      7997 views
      5.4: Types of Chemical Reactions (Practice Test)
      Decomposition Reactions
    1. Decomposition Reactions
      1866 views
      2. Combustion Reaction
    2. Combustion Reaction
      1831 views
      3. Addition or Combination Reactions
    3. Addition or Combination Reactions
      1358 views
      4. Neutralization Reaction
    4. Neutralization Reaction
      1552 views
      5. Single Displacement Reactions
    5. Single Displacement Reactions
      1680 views
      6. Double Displacement Reactions
    6. Double Displacement Reactions
      1311 views
      5.5: Energy Changes in Chemical Reactions (Practice Test)
      Exothermic and Endothermic Changes
    1. Exothermic and Endothermic Changes
      440 views
      2. Exothermic Reactions
    2. Exothermic Reactions
      3735 views
      3. Some Examples of Endothermic and Exothermic Reactions
    3. Some Examples of Endothermic and Exothermic Reactions
      4637 views
      4. Endothermic Reactions
    4. Endothermic Reactions
      2179 views
      5. Examples of Endothermic Reactions
    5. Examples of Endothermic Reactions
      1061 views
      6. Using Exothermic Reactions to Warm Food
    6. Using Exothermic Reactions to Warm Food
      1096 views

    Chapter 6 Acids, Alkalis and Salts ( 23 videos)  (Practice Test)

      6.1: Acids (Practice Test)
      Acids And Their Common Sources
    1. Acids And Their Common Sources
      658 views
      2. Concept of Acids
    2. Concept of Acids
      9746 views
      3. Reaction of Acids with Metals
    3. Reaction of Acids with Metals
      6379 views
      4. Uses of Hydrochloric Acid
    4. Uses of Hydrochloric Acid
      1743 views
      5. Uses of Nitric Acids
    5. Uses of Nitric Acids
      2215 views
      6. Uses of Sulphuric Acid
    6. Uses of Sulphuric Acid
      2262 views
      7. Uses of Acids
    7. Uses of Acids
      2493 views
      6.2: Alkalis (Practice Test)
      Alkalis
    1. Alkalis
      680 views
      2. Bases
    2. Bases
      117 views
      3. Copncept of Bases
    3. Copncept of Bases
      5662 views
      4. Reaction of Bases with Ammonium Salts
    4. Reaction of Bases with Ammonium Salts
      1313 views
      5. Uses of Alkalis
    5. Uses of Alkalis
      463 views
      6. Uses of Bases
    6. Uses of Bases
      1646 views
      7. Uses of Calcium Hydroxide
    7. Uses of Calcium Hydroxide
      8. Uses of Ammonium Hydroxide
    8. Uses of Ammonium Hydroxide
      6.3: Salts (Practice Test)
      Concept of Salts
    1. Concept of Salts
      4385 views
      2. Properties of Salts
    2. Properties of Salts
      2379 views
      3. Uses of Salts
    3. Uses of Salts
      3798 views
      6.4: pH and its Range in Aqueous Medium
      pH Scale
    1. pH Scale
      9484 views
      2. Measuring of pH by pH Meter
    2. Measuring of pH by pH Meter
      1560 views
      6.5: Indicators and their Uses (Practice Test)
      Indicators
    1. Indicators
      3980 views
      2. Universal Indicator
    2. Universal Indicator
      2293 views
      3. Natural Indicators
    3. Natural Indicators
      442 views

    Chapter 7 Force and Pressure ( 16 videos)  (Practice Test)

      7.1: Pressure, Force and Area (Practice Test)
      Pressure and Standard Atmospheric Pressure
    1. Pressure and Standard Atmospheric Pressure
      10827 views
      2. Effect of An Unbalanced Force On An Object
    2. Effect of An Unbalanced Force On An Object
      3. Introduction to Pressure
    3. Introduction to Pressure
      4202 views
      7.2: Water Pressure
      Pressure in Liquids
    1. Pressure in Liquids
      5855 views
      2. Buoyancy And Density Responsible For Sinking or Floating
    2. Buoyancy And Density Responsible For Sinking or Floating
      7.3: Pascal Law (Practice Test)
      Pascal’s Law
    1. Pascal’s Law
      4297 views
      2. Pascal’s Law
    2. Pascal’s Law
      5409 views
      3. Applications of Hydraulic System
    3. Applications of Hydraulic System
      29 views
      7.4: Gas Pressure in a Closed Container (Practice Test)
      Pressure of Gases And Pneumatics
    1. Pressure of Gases And Pneumatics
      27 views
      2. Applications of Compressed Air
    2. Applications of Compressed Air
      17 views
      7.5: Aerosols
      Aerosols
    1. Aerosols
      16 views
      7.6: Atmospheric Pressure (Practice Test)
      Pressure and Standard Atmospheric Pressure
    1. Pressure and Standard Atmospheric Pressure
      10827 views
      2. Investigate Effects Related To Pressure
    2. Investigate Effects Related To Pressure
      3. Change In Atmospheric Pressure With Altitude
    3. Change In Atmospheric Pressure With Altitude
      4. Difference Between Mass and Weight
    4. Difference Between Mass and Weight
      5. Air Resistance
    5. Air Resistance

    Chapter 8 Measurement of Physical Quantities ( 7 videos)  (Practice Test)

      8.1: Physical Quantities
      Physical Quantities
    1. Physical Quantities
      56493 views
      8.2: SI Units and their Importance (Practice Test)
      International Systems of Base Units
    1. International Systems of Base Units
      29680 views
      2. Standard of Length-Meter
    2. Standard of Length-Meter
      6721 views
      3. System International Units for Volume
    3. System International Units for Volume
      16 views
      4. Measurement of Volume
    4. Measurement of Volume
      532 views
      5. Standard of Mass-Kilogram
    5. Standard of Mass-Kilogram
      4359 views
      6. Standard of Time-Second
    6. Standard of Time-Second
      5294 views

    Chapter 9 Sources and Effects of Heat Energy ( 9 videos)  (Practice Test)

      9.1: Sources and Effects of Heat (Practice Test)
      Heat
    1. Heat
      420 views
      2. Sources of Heat
    2. Sources of Heat
      1127 views
      9.2: Thermal Expansion and Contraction (Practice Test)
      Expansions of Solids
    1. Expansions of Solids
      39 views
      2. Expansion of Liquids
    2. Expansion of Liquids
      1003 views
      3. Expansion of Gases
    3. Expansion of Gases
      534 views
      9.3: Applications of Expansion and Contraction of Solids (Practice Test)
      Application of Thermal Expansion
    1. Application of Thermal Expansion
      6150 views
      2. Expansions of Solids
    2. Expansions of Solids
      39 views
      9.4: Uses of Expansion and Contraction of Liquids
      Expansion of Liquids
    1. Expansion of Liquids
      1003 views
      9.5: Peculiar Behaviour of Expansion and Contraction of Water
      Anomalous Expansion of Water
    1. Anomalous Expansion of Water
      383 views

    Chapter 10 Lenses ( 13 videos)  (Practice Test)

      10.1: Lenses
      Convergence and Divergence of Lenses
    1. Convergence and Divergence of Lenses
      2291 views
      10.2: Types of Lenses
      Types of Lenses
    1. Types of Lenses
      7161 views
      10.3: Image Formation by Ray Diagram (Practice Test)
      Types of Lenses
    1. Types of Lenses
      1892 views
      2. Lens Terminologies
    2. Lens Terminologies
      5588 views
      3. Problem-Image Formed by Convex Lens
    3. Problem-Image Formed by Convex Lens
      4126 views
      10.4: Image Formation in Simple Camera and Human Eye (Practice Test)
      Concave Lens Formula
    1. Concave Lens Formula
      3195 views
      2. Eye
    2. Eye
      7259 views
      3. More on Eye
    3. More on Eye
      4034 views
      4. Human Eye
    4. Human Eye
      5327 views
      5. Shortsightedness
    5. Shortsightedness
      3128 views
      6. Shortsightedness
    6. Shortsightedness
      2534 views
      7. Adjustment of Eyes To Darkness
    7. Adjustment of Eyes To Darkness
      21 views
      10.5: Uses of Lenses (Practice Test)
      Uses of Lenses
    1. Uses of Lenses
      31 views

    Chapter 11 Electricity in Action ( 30 videos)  (Practice Test)

      11.1: Generating Electricity (Practice Test)
      Introduction to Electric Current
    1. Introduction to Electric Current
      8793 views
      2. Generating Electricity
    2. Generating Electricity
      7931 views
      3. AC Generator
    3. AC Generator
      17405 views
      4. Working of a Bicycle Dynamo
    4. Working of a Bicycle Dynamo
      803 views
      5. Working of a Power Plant
    5. Working of a Power Plant
      1251 views
      6. Thermal Power Plant
    6. Thermal Power Plant
      36 views
      7. Hydroelectric Power Station
    7. Hydroelectric Power Station
      27 views
      8. Wind Power Plant
    8. Wind Power Plant
      26 views
      9. Nuclear Power Plant
    9. Nuclear Power Plant
      50 views
      10. Forms of Energy
    10. Forms of Energy
      5282 views
      11. Chemical Energy
    11. Chemical Energy
      2161 views
      12. Kinetic Energy
    12. Kinetic Energy
      1360 views
      13. Potential Energy
    13. Potential Energy
      817 views
      14. Nuclear and Gravitational Energy
    14. Nuclear and Gravitational Energy
      171 views
      15. Role of Microbes in Energy Generation
    15. Role of Microbes in Energy Generation
      16. Solar Energy
    16. Solar Energy
      3171 views
      11.2: Problems of Generating Electricity (Practice Test)
      Safety Devices To Avoid Electrical Hazards
    1. Safety Devices To Avoid Electrical Hazards
      80 views
      2. More on Safety Devices To Avoid Electrical Hazards
    2. More on Safety Devices To Avoid Electrical Hazards
      60 views
      11.3: Electronic Systems (Practice Test)
      Principle of Transmission and Reception of em Waves
    1. Principle of Transmission and Reception of em Waves
      1060 views
      2. Reverse Biased p-n Junction
    2. Reverse Biased p-n Junction
      1747 views
      3. Transistor as an Amplifier
    3. Transistor as an Amplifier
      9325 views
      4. Introduction to Radio
    4. Introduction to Radio
      533 views
      5. What is Computer
    5. What is Computer
      7223 views
      6. Peripherals
    6. Peripherals
      1921 views
      7. Potential Difference
    7. Potential Difference
      306 views
      8. Resistance
    8. Resistance
      78 views
      9. Relationship Between Voltage And Resistance (Ohm's Law)
    9. Relationship Between Voltage And Resistance (Ohm's Law)
      166 views
      10. Electrical Power
    10. Electrical Power
      51 views
      11. Paying the Price of Electricity
    11. Paying the Price of Electricity
      12. Safety Devices To Avoid Electrical Hazards
    12. Safety Devices To Avoid Electrical Hazards
      80 views

    Chapter 12 Exploring Space ( 24 videos)  (Practice Test)

      12.1: Telescope, Space Craft and Spectroscope (Practice Test)
      Telescope
    1. Telescope
      50 views
      2. Refracting Telescope
    2. Refracting Telescope
      3. Spacecrafts And Their Types
    3. Spacecrafts And Their Types
      31 views
      4. Space Stations
    4. Space Stations
      22 views
      5. Space Probes
    5. Space Probes
      17 views
      6. Space Shuttle
    6. Space Shuttle
      42 views
      7. Spectroscopes
    7. Spectroscopes
      48 views
      8. Examples of Artificial Satellite
    8. Examples of Artificial Satellite
      969 views
      12.2: Space Exploration (Practice Test)
      Space Exploration
    1. Space Exploration
      2. Benefits of Space Exploration
    2. Benefits of Space Exploration
      29 views
      3. More Benefits of Space Exploration
    3. More Benefits of Space Exploration
      17 views
      4. Survival And Research In Space
    4. Survival And Research In Space
      20 views
      5. The Origin of The Universe
    5. The Origin of The Universe
      149 views
      6. Galaxies
    6. Galaxies
      311 views
      7. Stars
    7. Stars
      128 views
      8. Birth Of A Star
    8. Birth Of A Star
      102 views
      9. Death Of A Star
    9. Death Of A Star
      77 views
      10. Black Holes
    10. Black Holes
      147 views
      11. Geostationary, Polar Satellite
    11. Geostationary, Polar Satellite
      11943 views
      12. Key Milestones In Space Technology
    12. Key Milestones In Space Technology
      339 views
      13. Launching of a satellite into a space
    13. Launching of a satellite into a space
      238 views
      14. Research And Landsat Satellites
    14. Research And Landsat Satellites
      532 views
      15. Pakistan's Space Program
    15. Pakistan's Space Program
      16. Divisions of SUPARCO
    16. Divisions of SUPARCO