General Science | Class 8

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    Chapter 1 Ecology (16 videos) (Practice Test)

      1.1: Carbon And Oxygen Cycle (Practice Test)
      Oxygen Cycle
    1. Oxygen Cycle
      2. Carbon Cycle
    2. Carbon Cycle
      9649 views
      1.2: Energy Flow In The Ecosystem (Practice Test)
      Processes in Ecosystem and Interaction Between Biotic Components
    1. Processes in Ecosystem and Interaction Between Biotic Components
      1045 views
      2. Food Chain
    2. Food Chain
      2835 views
      3. Food Web
    3. Food Web
      4222 views
      4. Ecological Pyramids
    4. Ecological Pyramids
      3570 views
      5. Predation, Parasitism and Its Significance
    5. Predation, Parasitism and Its Significance
      2517 views
      6. Competition
    6. Competition
      7. Symbiosis
    7. Symbiosis
      3557 views
      8. More on Symbiosis
    8. More on Symbiosis
      1817 views
      9. Commensalism, Grazing
    9. Commensalism, Grazing
      1221 views
      10. Changes in an Ecosystem And Its Effects
    10. Changes in an Ecosystem And Its Effects
      1.3: Environmental Problems (Practice Test)
      Global Warming
    1. Global Warming
      4039 views
      1.4: Solution of Environmental Problems (Practice Test)
      How to Control Pollution?
    1. How to Control Pollution?
      1308 views
      2. Control and Prevention Measures of Pollution
    2. Control and Prevention Measures of Pollution
      594 views
      3. Conservation of Biodiversity, Endangered Species in Pakistan
    3. Conservation of Biodiversity, Endangered Species in Pakistan
      4067 views

    Chapter 2 Human Nervous System (10 videos) (Practice Test)

      2.1: 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. Spinal Cord
    6. Spinal Cord
      498 views
      7. Peripheral Nervous System
    7. Peripheral Nervous System
      8. Working Model of The Nervous System
    8. Working Model of The Nervous System
      110 views
      9. Actions Controlled By The Nervous System
    9. Actions Controlled By The Nervous System
      33 views
      2.2: Reflex Action (Practice Test)
      Reflex Action
    1. Reflex Action
      10745 views

    Chapter 3 Variations, Heredity And Cell Division (14 videos) (Practice Test)

      3.1: Genetics (Practice Test)
      Heredity
    1. Heredity
      2. Branches of Biology: Genetics and Embryology
    2. Branches of Biology: Genetics and Embryology
      7526 views
      3.2: Difference Between Adaptation And Variation (Practice Test)
      Causes of Variations
    1. Causes of Variations
      2. What is Adaptation?
    2. What is Adaptation?
      343 views
      3.3: Basis of Heredity (Practice Test)
      Heredity
    1. Heredity
      2. Concept of Gene
    2. Concept of Gene
      14952 views
      3.4: Watson And Crick Model of DNA (Practice Test)
      Advance (Watson and Crick's Model)
    1. Advance (Watson and Crick's Model)
      65841 views
      3.5: Transmission of Characters (Practice Test)
      Sexual Reproduction
    1. Sexual Reproduction
      518 views
      3.6: Cell Division (Practice Test)
      Cell Division
    1. Cell Division
      2. Mitosis, Prophase
    2. Mitosis, Prophase
      30609 views
      3. Anaphase, Telophase of Mitosis
    3. Anaphase, Telophase of Mitosis
      16891 views
      4. Metaphase I, Anaphase I and Telophase I
    4. Metaphase I, Anaphase I and Telophase I
      15853 views
      5. Meiosis-II
    5. Meiosis-II
      7798 views
      6. Difference Between Mitosis And Meiosis
    6. Difference Between Mitosis And Meiosis
      152 views

    Chapter 4 Biotechnology (7 videos) (Practice Test)

      4.1: Genetic Engineering (Practice Test)
      Genetic Engineering
    1. Genetic Engineering
      190 views
      2. Introduction of Genes Into Bacterium
    2. Introduction of Genes Into Bacterium
      120 views
      4.2: Fermentation (Practice Test)
      Fermentation Product
    1. Fermentation Product
      2735 views
      4.3: Biotechnology Products (Practice Test)
      Role of Biotechnology In Health And Environment
    1. Role of Biotechnology In Health And Environment
      127 views
      4.4: Applications of Biotechnology (Practice Test)
      Uses and Applications of Biotechnology( With Reference to Plants)
    1. Uses and Applications of Biotechnology( With Reference to Plants)
      381 views
      2. Role of Biotechnology In Agriculture, Food Production And Preservation
    2. Role of Biotechnology In Agriculture, Food Production And Preservation
      135 views
      3. Role of Biotechnology In Health And Environment
    3. Role of Biotechnology In Health And Environment
      127 views

    Chapter 5 Periodic Table (10 videos) (Practice Test)

      5.1: Periodic Table of Elements (Practice Test)
      The Periodic Table
    1. The Periodic Table
      2. Periods in Modern Periodic Table
    2. Periods in Modern Periodic Table
      11219 views
      3. Groups in Modern Periodic Table
    3. Groups in Modern Periodic Table
      14467 views
      5.2: First 18 Elements of The Periodic Table (Practice Test)
      Distribution of Electrons in Shell
    1. Distribution of Electrons in Shell
      660 views
      2. More on Distribution of Electrons in Shell
    2. More on Distribution of Electrons in Shell
      133 views
      5.3: Metals And Non - Metals (Practice Test)
      Metals and Non-Metals
    1. Metals and Non-Metals
      2603 views
      2. More on Metals and Non-Metals
    2. More on Metals and Non-Metals
      1818 views
      3. Properties of Metals
    3. Properties of Metals
      964 views
      4. Uses of Metals
    4. Uses of Metals
      739 views
      5. Properties of Non-Metals
    5. Properties of Non-Metals
      701 views

    Chapter 6 Chemical Reactions (18 videos) (Practice Test)

      6.1: Chemical Reactions (Practice Test)
      Introduction To Chemical Reactions
    1. Introduction To Chemical Reactions
      2. Chemical Equation and Writing of Chemical Equation
    2. Chemical Equation and Writing of Chemical Equation
      1466 views
      3. Balancing of Chemical Equation
    3. Balancing of Chemical Equation
      3606 views
      4. Law of Conservation of Mass
    4. Law of Conservation of Mass
      7997 views
      5. Decomposition Reactions
    5. Decomposition Reactions
      1866 views
      6. Combustion Reaction
    6. Combustion Reaction
      1831 views
      7. Addition or Combination Reactions
    7. Addition or Combination Reactions
      1358 views
      8. Single Displacement Reactions
    8. Single Displacement Reactions
      1680 views
      9. Double Displacement Reactions
    9. Double Displacement Reactions
      1311 views
      6.2: 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. Endothermic Reactions
    3. Endothermic Reactions
      2179 views
      4. Using Exothermic Reactions to Warm Food
    4. Using Exothermic Reactions to Warm Food
      1096 views
      6.3: Chemical Bonds (Practice Test)
      Why do Atoms Form Chemical Bonds?
    1. Why do Atoms Form Chemical Bonds?
      14190 views
      2. Chemical Bond
    2. Chemical Bond
      10646 views
      3. Ionic Bond
    3. Ionic Bond
      12605 views
      4. Covalent Bond
    4. Covalent Bond
      9028 views
      5. Types of Covalent Bonds
    5. Types of Covalent Bonds
      6542 views

    Chapter 7 Acids, Bases And Salts (17 videos) (Practice Test)

      7.1: Acids (Practice Test)
      Introduction to Acids and Bases
    1. Introduction to Acids and Bases
      3960 views
      2. Acids And Their Common Sources
    2. Acids And Their Common Sources
      658 views
      3. Uses of Acids
    3. Uses of Acids
      2493 views
      7.2: Bases / Alkalis (Practice Test)
      Bases
    1. Bases
      117 views
      2. Alkalis
    2. Alkalis
      680 views
      3. Introduction to Acids and Bases
    3. Introduction to Acids and Bases
      3960 views
      4. Uses of Bases
    4. Uses of Bases
      1646 views
      5. Uses of Alkalis
    5. Uses of Alkalis
      463 views
      7.3: Salts (Practice Test)
      Concept of Salts
    1. Concept of Salts
      4385 views
      2. Types of Salts, Normal or Neutral Salts
    2. Types of Salts, Normal or Neutral Salts
      4899 views
      3. Acidic Salts
    3. Acidic Salts
      3653 views
      4. Basic Salts
    4. Basic Salts
      3106 views
      5. Introduction to Acids and Bases
    5. Introduction to Acids and Bases
      3960 views
      6. Uses of Salts
    6. Uses of Salts
      3798 views
      7.4: pH Scale (Practice Test)
      pH Scale
    1. pH Scale
      9484 views
      7.5: Indicators (Practice Test)
      Indicators
    1. Indicators
      3980 views
      2. Natural Indicators
    2. Natural Indicators
      442 views

    Chapter 8 Force And Pressure (9 videos) (Practice Test)

      8.1: Balanced And Unbalanced Forces (Practice Test)
      Force
    1. Force
      47 views
      2. Balanced Forces
    2. Balanced Forces
      236 views
      3. Unbalanced Forces
    3. Unbalanced Forces
      142 views
      8.2: Floating And Sinking With Reference To Density
      Buoyancy And Density Responsible For Sinking or Floating
    1. Buoyancy And Density Responsible For Sinking or Floating
      8.3: Pressure, Force And Area
      Pressure And Its Unit
    1. Pressure And Its Unit
      8.4: Water Pressure (Practice Test)
      Pressure in Liquids
    1. Pressure in Liquids
      5855 views
      2. Investigate Effects Related To Pressure
    2. Investigate Effects Related To Pressure
      8.5: Hydraulic Elevator (Practice Test)
      Applications of Hydraulic System
    1. Applications of Hydraulic System
      29 views
      8.6: Examine The Effect of Force In The Presence of Air (Practice Test)
      Applications of Compressed Air
    1. Applications of Compressed Air
      17 views

    Chapter 9 Reflection And Refraction of Light (21 videos) (Practice Test)

      9.1: Speed of Light (Practice Test)
      Speed of Light
    1. Speed of Light
      102 views
      2. Transmission of Light
    2. Transmission of Light
      2535 views
      3. Reflecting Light
    3. Reflecting Light
      1034 views
      9.2: Occurrence of Reflection (Practice Test)
      Laws of Reflection
    1. Laws of Reflection
      764 views
      2. Types of Reflection
    2. Types of Reflection
      1095 views
      3. Types of Reflecting Surfaces
    3. Types of Reflecting Surfaces
      705 views
      4. Images Formed By a Plane Mirror
    4. Images Formed By a Plane Mirror
      592 views
      9.3: Optical Instruments Using Plane Mirror (Practice Test)
      Periscope
    1. Periscope
      558 views
      9.4: Refraction (Practice Test)
      Refraction of Light
    1. Refraction of Light
      564 views
      2. Laws of Refraction
    2. Laws of Refraction
      176 views
      3. Refractive Index
    3. Refractive Index
      754 views
      4. Real And Apparent Depth
    4. Real And Apparent Depth
      803 views
      5. Dispersion of Light
    5. Dispersion of Light
      568 views
      6. Rainbow Formation
    6. Rainbow Formation
      306 views
      7. How do we See Colors of an Object?
    7. How do we See Colors of an Object?
      9.5: Spherical Mirrors (Practice Test)
      Types of Mirrors
    1. Types of Mirrors
      829 views
      2. Image Formation In Concave Mirrors
    2. Image Formation In Concave Mirrors
      190 views
      3. More on Image Formation in Concave Mirror
    3. More on Image Formation in Concave Mirror
      4. Image Formation In Convex Mirrors
    4. Image Formation In Convex Mirrors
      522 views
      5. Usage of Concave Mirror
    5. Usage of Concave Mirror
      853 views
      6. Usage of Convex Mirror
    6. Usage of Convex Mirror
      1509 views

    Chapter 10 Electricity And Magnetism (12 videos) (Practice Test)

      10.1: Electric Current (Practice Test)
      Electric Current
    1. Electric Current
      112 views
      10.2: Voltage And Resistance (Practice Test)
      Voltage
    1. Voltage
      2. Resistance
    2. Resistance
      78 views
      3. Relationship Between Voltage And Resistance (Ohm's Law)
    3. Relationship Between Voltage And Resistance (Ohm's Law)
      166 views
      10.3: Electrical Power (Practice Test)
      Electrical Power
    1. Electrical Power
      51 views
      10.4: Dangers of Overloading And Short Circuit (Practice Test)
      Why is Electricity Dangerous?
    1. Why is Electricity Dangerous?
      47 views
      10.5: Earth Wire, Fuse And Circuit Breaker (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
      10.6: Precautionary Measures To Ensure The Safe Use of Electricity (Practice Test)
      Why is Electricity Dangerous?
    1. Why is Electricity Dangerous?
      47 views
      10.7: Uses of Electromagnets (Practice Test)
      Electromagnet
    1. Electromagnet
      2. Applications of Electromagnet: Electric Bell and Speaker
    2. Applications of Electromagnet: Electric Bell and Speaker
      3. Stereo Speakers As An Applications of Electromagnets
    3. Stereo Speakers As An Applications of Electromagnets

    Chapter 11 Technology In Everyday Life (6 videos)

      11.1: Making Bioplastic
      Applications of Acids & Bases in Technology
    1. Applications of Acids & Bases in Technology
      11.2: Making Toothpaste
      Applications of Acids & Bases in Technology
    1. Applications of Acids & Bases in Technology
      11.3: Preparation of Soap And Detergents
      Applications of Acids & Bases in Technology
    1. Applications of Acids & Bases in Technology
      11.4: Assembling A Concave Mirror Solar Cooker
      Designing A Concave Mirror Type Solar Cooker
    1. Designing A Concave Mirror Type Solar Cooker
      11.5: Working of UPS To Operate A Fan Or Energy Saver
      Working of UPS
    1. Working of UPS
      11.6: Assembling A Simple Wind Turbine To Produce Electricity
      Designing A Wind Turbine
    1. Designing A Wind Turbine

    Chapter 12 Our Universe (13 videos) (Practice Test)

      12.1: Galaxies (Practice Test)
      Galaxies
    1. Galaxies
      311 views
      2. Milky Way Galaxy
    2. Milky Way Galaxy
      201 views
      3. Stars and Planets
    3. Stars and Planets
      4. Birth Of A Star
    4. Birth Of A Star
      102 views
      5. Death Of A Star
    5. Death Of A Star
      77 views
      6. Black Hole and its Evidence
    6. Black Hole and its Evidence
      12.2: Space Exploration (Practice Test)
      Technologies Used For Space Explorations
    1. Technologies Used For Space Explorations
      21 views
      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
      12.3: How Do Astronauts Survive And Research In Space?
      Remote Sensing Of Earth
    1. Remote Sensing Of Earth
      12.4: Technological Tools Used In Space Exploration (Practice Test)
      Technologies Used For Space Explorations
    1. Technologies Used For Space Explorations
      21 views
      2. Space Probes
    2. Space Probes
      17 views
      12.5: New Technologies Developed On The Earth As A Result of Space Exploration
      New Technologies As A Result Of Space Exploration
    1. New Technologies As A Result Of Space Exploration