Science - KhanAcademy

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Select section General

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General

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Select section 1.Chemical Reactions and Equations

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1.Chemical Reactions and Equations
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  Chemical Equations
  
  Select activity Intro to Chemical reactions
  
  
  
  Intro to Chemical reactions Lesson
  
  Students must
  
  Mark as done
  
  Select activity Balancing chemical equations
  
  
  
  Balancing chemical equations Lesson
  
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  Select activity Balancing more complex chemical equations
  
  
  
  Balancing more complex chemical equations Lesson
  
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  Select activity Chemical Equations--Test
  
  
  
  Chemical Equations--Test Quiz
  
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  Types of Chemical Reactions
  
  Select activity Combination and decomposition reaction
  
  
  
  Combination and decomposition reaction Lesson
  
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  Select activity Displacement reaction
  
  
  
  Displacement reaction Lesson
  
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  Select activity Double displacement reaction
  
  
  
  Double displacement reaction Lesson
  
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  Select activity All types of reactions: Solved examples
  
  
  
  All types of reactions: Solved examples Lesson
  
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  Select activity Oxidation and reduction (Conventional definition)
  
  
  
  Oxidation and reduction (Conventional definition) Lesson
  
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  Select activity Exothermic and endothermic reactions
  
  
  
  Exothermic and endothermic reactions Lesson
  
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  Select activity Exothermic and endothermic: Common processes and solved examples
  
  
  
  Exothermic and endothermic: Common processes and solved examples Lesson
  
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  Select activity Types of Chemical Reactions--Test
  
  
  
  Types of Chemical Reactions--Test Quiz
  
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Select section 2.Acids, Bases and Salts

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2.Acids, Bases and Salts
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  Understanding of Chemical properties of acids and basis
  
  Select activity Reaction of acids and bases with metals
  
  
  
  Reaction of acids and bases with metals Lesson
  
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  Select activity Reaction of acids with metal carbonates and bicarbonates
  
  
  
  Reaction of acids with metal carbonates and bicarbonates Lesson
  
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  Select activity Metal and non-metal oxides, reacting with acids and bases
  
  
  
  Metal and non-metal oxides, reacting with acids and bases Lesson
  
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  Select activity Understanding of Chemical properties of acids and basis--Test
  
  
  
  Understanding of Chemical properties of acids and basis--Test Quiz
  
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  how strong are acid or base solutions
  
  Select activity Introduction to pH
  
  
  
  Introduction to pH Lesson
  
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  Select activity Strength of solution vs concentration
  
  
  
  Strength of solution vs concentration Lesson
  
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  Select activity Strong and weak acids/bases
  
  
  
  Strong and weak acids/bases Lesson
  
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  Select activity pH change & the concentration of H+/OH-
  
  
  
  pH change & the concentration of H+/OH- Lesson
  
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  Select activity How strong are acid or base solutions--Test
  
  
  
  How strong are acid or base solutions--Test Quiz
  
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  More About Salts
  
  Select activity Litmus solution (Natural indicator)
  
  
  
  Litmus solution (Natural indicator) Lesson
  
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  Select activity Baking soda
  
  
  
  Baking soda Lesson
  
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  Select activity Bleaching powder
  
  
  
  Bleaching powder Lesson
  
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  Select activity Washing soda
  
  
  
  Washing soda Lesson
  
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  Select activity Acid base neutralisation reaction
  
  
  
  Acid base neutralisation reaction Lesson
  
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  Select activity Given salt, find acid and base
  
  
  
  Given salt, find acid and base Lesson
  
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  Select activity Identify salts as neutral, acidic, or basic
  
  
  
  Identify salts as neutral, acidic, or basic Lesson
  
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  Select activity More About Salts--Test
  
  
  
  More About Salts--Test Quiz
  
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Select section 3.Metals and Non-metals

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3.Metals and Non-metals
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  Physical Properties
  
  Select activity Intro to physical properties of metals
  
  Intro to physical properties of metals Lesson
  
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  Select activity Physical Properties--Test
  
  Physical Properties--Test Quiz
  
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  Chemical Properties of metals
  
  Select activity Metals reacting with acid
  
  
  
  Metals reacting with acid Lesson
  
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  Select activity Metals reacting with oxygen
  
  
  
  Metals reacting with oxygen Lesson
  
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  Select activity Metals reacting with water
  
  
  
  Metals reacting with water Lesson
  
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  Select activity Chemical Properties of metals--Test
  
  
  
  Chemical Properties of metals--Test Quiz
  
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  How do Metals and Non MetalsReact?
  
  Select activity Ionic bonds: Reaction of metals & Non-metals
  
  Ionic bonds: Reaction of metals & Non-metals Lesson
  
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  Select activity How do Metals and Non MetalsReact?--Test
  
  How do Metals and Non MetalsReact?--Test Quiz
  
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  Occurence of Metals
  
  Select activity Electrolytic refining of metals
  
  
  
  Electrolytic refining of metals Lesson
  
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  Select activity Extraction of metals - overview
  
  
  
  Extraction of metals - overview Lesson
  
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  Select activity Nature of metal oxides
  
  
  
  Nature of metal oxides Lesson
  
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  Select activity Reactivity series
  
  
  
  Reactivity series Lesson
  
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  Select activity Reduction of metal oxides - Extraction of metals
  
  
  
  Reduction of metal oxides - Extraction of metals Lesson
  
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  Select activity Roasting and calcination - extraction of metal
  
  
  
  Roasting and calcination - extraction of metal Lesson
  
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  Select activity Occurence of Metals--Test
  
  
  
  Occurence of Metals--Test Quiz
  
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Select section 4.Carbon and its Compounds

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4.Carbon and its Compounds
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  Bonding in Carbon-The covalent Bond
  
  Select activity Carbon as a building block of life
  
  
  
  Carbon as a building block of life Lesson
  
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  Select activity Covalent bond
  
  
  
  Covalent bond Lesson
  
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  Select activity Covalent bond and Lewis dot structure (H2O & CO2)
  
  
  
  Covalent bond and Lewis dot structure (H2O & CO2) Lesson
  
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  Select activity Dot structures I: Single bonds
  
  
  
  Dot structures I: Single bonds Lesson
  
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  Select activity Dot structures II: Multiple bonds
  
  
  
  Dot structures II: Multiple bonds Lesson
  
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  Select activity Bonding in Carbon-The covalent Bond--Test
  
  
  
  Bonding in Carbon-The covalent Bond--Test Quiz
  
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  Versatile Nature Of Carbon
  
  Select activity Alkanes, Alkenes, and Alkynes- General molecular formula
  
  
  
  Alkanes, Alkenes, and Alkynes- General molecular formula Lesson
  
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  Select activity Functional groups
  
  
  
  Functional groups Lesson
  
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  Select activity Hydrocarbon overview: Alkanes, Alkenes, and Alkynes
  
  
  
  Hydrocarbon overview: Alkanes, Alkenes, and Alkynes Lesson
  
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  Select activity Naming simple alkanes
  
  
  
  Naming simple alkanes Lesson
  
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  Select activity Nomenclature of carbon compounds (Including functional groups)
  
  
  
  Nomenclature of carbon compounds (Including functional groups) Lesson
  
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  Select activity Nomenclature of hydrocarbons: Alkanes, Alkenes, & Alkynes
  
  
  
  Nomenclature of hydrocarbons: Alkanes, Alkenes, & Alkynes Lesson
  
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  Select activity Representing structures of organic molecules
  
  
  
  Representing structures of organic molecules Lesson
  
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  Select activity Versatile Nature Of Carbon--Test
  
  
  
  Versatile Nature Of Carbon--Test Quiz
  
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Select section 5.Life Processes

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5.Life Processes
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  What are Life Processes
  
  Select activity Intro to life processes
  
  Intro to life processes Lesson
  
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  Select activity What are Life Processes--Test
  
  What are Life Processes--Test Quiz
  
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  Nutrition
  
  Select activity Autotrophs & heterotrophs (nutrition modes)
  
  
  
  Autotrophs & heterotrophs (nutrition modes) Lesson
  
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  Select activity Photosynthesis
  
  
  
  Photosynthesis Lesson
  
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  Select activity Digesting Food
  
  
  
  Digesting Food Lesson
  
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  Select activity Nutrition--Test
  
  
  
  Nutrition--Test Quiz
  
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  Respiration
  
  Select activity Respiration site & ATP
  
  
  
  Respiration site & ATP Lesson
  
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  Select activity Aerobic & anaerobic respiration
  
  
  
  Aerobic & anaerobic respiration Lesson
  
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  Select activity Meet the lungs
  
  
  
  Meet the lungs Lesson
  
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  Select activity How does lung volume change?
  
  
  
  How does lung volume change? Lesson
  
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  Select activity Inhaling and exhaling
  
  
  
  Inhaling and exhaling Lesson
  
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  Select activity Respiration--Test
  
  
  
  Respiration--Test Quiz
  
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  Transportation
  
  Select activity Meet the heart!
  
  
  
  Meet the heart! Lesson
  
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  Select activity Lymph, lymph nodes, & lymphatic system
  
  
  
  Lymph, lymph nodes, & lymphatic system Lesson
  
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  Select activity Two Circulations in the Body
  
  
  
  Two Circulations in the Body Lesson
  
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  Select activity Arteries vs. veins-what's the difference?
  
  
  
  Arteries vs. veins-what's the difference? Lesson
  
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  Select activity Flow through the heart
  
  
  
  Flow through the heart Lesson
  
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  Select activity Intro to vascular tissues (xylem & phloem)
  
  
  
  Intro to vascular tissues (xylem & phloem) Lesson
  
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  Select activity Xylem & transpiration
  
  
  
  Xylem & transpiration Lesson
  
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  Select activity Phloem & translocation
  
  
  
  Phloem & translocation Lesson
  
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  Select activity Transportation--Test
  
  
  
  Transportation--Test Quiz
  
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  Excretion
  
  Select activity Meet the kidneys!
  
  
  
  Meet the kidneys! Lesson
  
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  Select activity Parts of a nephron
  
  
  
  Parts of a nephron Lesson
  
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  Select activity Excretion--Test
  
  
  
  Excretion--Test Quiz
  
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Select section 6.Control and Coordination

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6.Control and Coordination
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  Animals-Nervous Sytem
  
  Select activity Reflex action (& reflex arc)
  
  
  
  Reflex action (& reflex arc) Lesson
  
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  Select activity Nervous system (central & peripheral)
  
  
  
  Nervous system (central & peripheral) Lesson
  
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  Select activity Brain: Parts & functions (Fore, mid & hind)
  
  
  
  Brain: Parts & functions (Fore, mid & hind) Lesson
  
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  Select activity Endocrine system (major hormones & functions)
  
  
  
  Endocrine system (major hormones & functions) Lesson
  
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  Select activity Animals-Nervous Sytem--Test
  
  
  
  Animals-Nervous Sytem--Test Quiz
  
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  Hormones in animals
  
  Select activity Hormones Intro & working
  
  Hormones Intro & working Lesson
  
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  Select activity Hormones in animals--Test
  
  Hormones in animals--Test Quiz
  
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  Coordination in Plants
  
  Select activity Tropism (Types, positive & negative)
  
  
  
  Tropism (Types, positive & negative) Lesson
  
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  Select activity Major plant hormones (& how to remember)
  
  
  
  Major plant hormones (& how to remember) Lesson
  
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  Select activity Coordination in Plants--Test
  
  
  
  Coordination in Plants--Test Quiz
  
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Select section 7.How do Organisms Reproduce?

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7.How do Organisms Reproduce?
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  Do Organisms Craete Exact Copies of Themselves?
  
  Select activity Why reproduction (Intro)
  
  
  
  Why reproduction (Intro) Lesson
  
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  Select activity Variation & its importance
  
  
  
  Variation & its importance Lesson
  
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  Select activity Do Organisms Craete Exact Copies of Themselves?--Test
  
  
  
  Do Organisms Craete Exact Copies of Themselves?--Test Quiz
  
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  Modes of Reproduction used by single organisms
  
  Select activity Reproduction, DNA, sexual & asexual
  
  
  
  Reproduction, DNA, sexual & asexual Lesson
  
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  Select activity Fission (binary & multiple) with examples
  
  
  
  Fission (binary & multiple) with examples Lesson
  
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  Select activity Budding, spores, fragmentation & regeneration
  
  
  
  Budding, spores, fragmentation & regeneration Lesson
  
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  Select activity Vegetative propagation (& advantages)
  
  
  
  Vegetative propagation (& advantages) Lesson
  
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  Select activity Modes of Reproduction used by single organisms--Test
  
  
  
  Modes of Reproduction used by single organisms--Test Quiz
  
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  Sexual Reproduction
  
  Select activity Why sexual reproduction (faster variation)
  
  
  
  Why sexual reproduction (faster variation) Lesson
  
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  Select activity Flower: Parts of stamen, carpel
  
  
  
  Flower: Parts of stamen, carpel Lesson
  
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  Select activity Flower: Sexual parts (unisexual & bisexual)
  
  
  
  Flower: Sexual parts (unisexual & bisexual) Lesson
  
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  Select activity Pollination (self & cross)
  
  
  
  Pollination (self & cross) Lesson
  
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  Select activity Fertilisation, zygote, embryo, germination | How do organisms reproduce | Biology | Khan Academy
  
  
  
  Fertilisation, zygote, embryo, germination | How do organisms reproduce | Biology | Khan Academy Lesson
  
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  Select activity Male reproductive system (humans)
  
  
  
  Male reproductive system (humans) Lesson
  
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  Select activity Female reproductive sys, menstruation & fertilisation
  
  
  
  Female reproductive sys, menstruation & fertilisation Lesson
  
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  Select activity Germ cells, gametes & sexual reproduction
  
  
  
  Germ cells, gametes & sexual reproduction Lesson
  
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  Select activity Placenta
  
  
  
  Placenta Lesson
  
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  Select activity Contraceptives (mechanical barriers, hormonal, surgical)
  
  
  
  Contraceptives (mechanical barriers, hormonal, surgical) Lesson
  
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  Select activity Sexual Reproduction--Test
  
  
  
  Sexual Reproduction--Test Quiz
  
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Select section 8.Heredity

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8.Heredity
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  Heredity
  
  Select activity Mendel's experiment (monohybrid cross)
  
  
  
  Mendel's experiment (monohybrid cross) Lesson
  
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  Select activity Why Mendel chose peas
  
  
  
  Why Mendel chose peas Lesson
  
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  Select activity Genes, DNA & chromosomes
  
  
  
  Genes, DNA & chromosomes Lesson
  
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  Select activity Sex determination
  
  
  
  Sex determination Lesson
  
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  Select activity Dominance & segregation laws
  
  
  
  Dominance & segregation laws Lesson
  
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  Select activity Heredity--Test
  
  
  
  Heredity--Test Quiz
  
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Select section 9.Light-Reflection and Refraction

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9.Light-Reflection and Refraction
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  Reflection Of Light
  
  Select activity Reflection of light - Intro
  
  Reflection of light - Intro Lesson
  
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  Select activity Reflection Of Light--Test
  
  Reflection Of Light--Test Quiz
  
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  Spherical Mirrors
  
  Select activity Spherical & parabolic mirrors
  
  
  
  Spherical & parabolic mirrors Lesson
  
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  Select activity Spherical mirrors, radius of curvature & focal length
  
  
  
  Spherical mirrors, radius of curvature & focal length Lesson
  
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  Select activity Concave mirrors
  
  
  
  Concave mirrors Lesson
  
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  Select activity Concave mirror applications
  
  
  
  Concave mirror applications Lesson
  
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  Select activity Convex mirror & applications
  
  
  
  Convex mirror & applications Lesson
  
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  Select activity Convex & concave mirror ray diagrams
  
  
  
  Convex & concave mirror ray diagrams Lesson
  
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  Select activity Sign conventions for mirror (& lenses)
  
  
  
  Sign conventions for mirror (& lenses) Lesson
  
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  Select activity Mirror formula
  
  
  
  Mirror formula Lesson
  
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  Select activity Magnification formula for mirrors
  
  
  
  Magnification formula for mirrors Lesson
  
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  Select activity Solved example: Mirror formula
  
  
  
  Solved example: Mirror formula Lesson
  
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  Select activity Spherical Mirrors--Test
  
  
  
  Spherical Mirrors--Test Quiz
  
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  Refraction Of Light
  
  Select activity Refraction and Snell's law
  
  
  
  Refraction and Snell's law Lesson
  
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  Select activity Refraction through glass slab
  
  
  
  Refraction through glass slab Lesson
  
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  Select activity Absolute & Relative refractive index
  
  
  
  Absolute & Relative refractive index Lesson
  
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  Select activity Relative & absolute R.I. connection
  
  
  
  Relative & absolute R.I. connection Lesson
  
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  Select activity Convex lenses
  
  
  
  Convex lenses Lesson
  
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  Select activity Convex lens examples
  
  
  
  Convex lens examples Lesson
  
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  Select activity Concave lenses
  
  
  
  Concave lenses Lesson
  
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  Select activity Lens formula
  
  
  
  Lens formula Lesson
  
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  Select activity Magnification formula for lenses
  
  
  
  Magnification formula for lenses Lesson
  
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  Select activity Solved example on lens formula
  
  
  
  Solved example on lens formula Lesson
  
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  Select activity Power of lens
  
  
  
  Power of lens Lesson
  
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  Select activity Revision : Lenses and mirrors
  
  
  
  Revision : Lenses and mirrors Lesson
  
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  Select activity Refraction Of Light--Test
  
  
  
  Refraction Of Light--Test Quiz
  
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Select section 10.Human Eye and Colourful World

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10.Human Eye and Colourful World
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  The Human Eye
  
  Select activity Parts of the eye
  
  
  
  Parts of the eye Lesson
  
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  Select activity Human eye: accommodation and near point
  
  
  
  Human eye: accommodation and near point Lesson
  
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  Select activity The Human Eye--Test
  
  
  
  The Human Eye--Test Quiz
  
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  Defects of Vision and Their Correction
  
  Select activity Myopia & Hypermetropia
  
  
  
  Myopia & Hypermetropia Lesson
  
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  Select activity Presbyopia
  
  
  
  Presbyopia Lesson
  
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  Select activity Numerical on myopia
  
  
  
  Numerical on myopia Lesson
  
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  Select activity Defects of Vision and Their Correction--Test
  
  
  
  Defects of Vision and Their Correction--Test Quiz
  
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  Refraction Of Light Through a Prism
  
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  Prism & dispersion of light Lesson
  
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  Newton's prism experiment Lesson
  
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  Atmospheric Refraction
  
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  Why do stars twinkle (but planets don't)? Lesson
  
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  Advanced sunrise & delayed sunset Lesson
  
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  Atmospheric Refraction--Test Quiz
  
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  Scattering of Light
  
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  Scattering of light & Tyndall effect Lesson
  
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  Why is the sky blue (and the sun yellow)? Lesson
  
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  Revision: Human eye & colourful world
  
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Select section 11.Electricity

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11.Electricity
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  Introduction
  
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  Intro to charge Lesson
  
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  Unit of charge (Coulombs) Lesson
  
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  Introduction--Test Quiz
  
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  Electric Current and Circuit
  
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  Intro to current (& Amperes) Lesson
  
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  Solved example: Finding current & voltage in a circuit Lesson
  
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  Electric potential and potential difference
  
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  Intro to potential difference (& voltage) Lesson
  
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  Solved example: Potential difference & work done Lesson
  
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  Circuit Diagram and Ohms Law
  
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  Ohms Law
  
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  Ohm's law graph (verifying Ohm's law) Lesson
  
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  Solved example: (Ohm's law graph) Lesson
  
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  Solved example: Ohms law Lesson
  
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  Factors on which Resistance of a conductor depends
  
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  Resistivity and conductivity Lesson
  
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  Resistance of a system of Resistors
  
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  Series resistors Lesson
  
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  Parallel resistors (part 3) Lesson
  
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  Parallel resistors (part 3) Lesson
  
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  Select activity Example: Analyzing a more complex resistor circuit
  
  
  
  Example: Analyzing a more complex resistor circuit Lesson
  
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  Electric Power
  
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  Electric power & energy Lesson
  
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  Commercial unit of electrical energy Lesson
  
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  Solved example - Cost of operation of electrical device Lesson
  
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  Electric Power--Test Quiz
  
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  CBSE board practice: Electricity numerical
  
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  CBSE board practice: Electricity numerical Lesson
  
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Select section 12.Magnetic Effect of electric current

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12.Magnetic Effect of electric current
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  Magnetic Field and Field Lines
  
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  Intro to magnetic fields (Why fields?) Lesson
  
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  Select activity Magnetic field lines (& their properties)
  
  
  
  Magnetic field lines (& their properties) Lesson
  
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  Select activity Magnetic Field and Field Lines--Test
  
  
  
  Magnetic Field and Field Lines--Test Quiz
  
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  Magnetic field due to current carrying Conductor
  
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  Magnetic field due to current carrying loop Lesson
  
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  Right hand thumb rule (& solved numerical) Lesson
  
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  Select activity Magnetic fields through solenoids
  
  
  
  Magnetic fields through solenoids Lesson
  
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  Select activity Magnetic field due to current carrying Conductor--Test
  
  
  
  Magnetic field due to current carrying Conductor--Test Quiz
  
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  Force on a current carrying conductor in a magnetic field
  
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  Force on a current carrying conductor in a magnetic field Lesson
  
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  Select activity Fleming's left hand rule
  
  
  
  Fleming's left hand rule Lesson
  
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  Select activity Solved numerical: Fleming's left hand rule
  
  
  
  Solved numerical: Fleming's left hand rule Lesson
  
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  Select activity Force on a current carrying conductor in a magnetic field--Test
  
  
  
  Force on a current carrying conductor in a magnetic field--Test Quiz
  
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  Domestic Electric Circuits
  
  Select activity Live wire, neutral & ground (earth wire) - Domestic circuits (part 1)
  
  
  
  Live wire, neutral & ground (earth wire) - Domestic circuits (part 1) Lesson
  
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  Select activity Domestic circuit connection & fuse - Domestic circuit (Part 2)
  
  
  
  Domestic circuit connection & fuse - Domestic circuit (Part 2) Lesson
  
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  Select activity Overload & short circuit: Domestic circuits (Part 3)
  
  
  
  Overload & short circuit: Domestic circuits (Part 3) Lesson
  
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  Select activity Domestic Electric Circuits--Test
  
  
  
  Domestic Electric Circuits--Test Quiz
  
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  Revision: Magnetic effects of current
  
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  Revision: Magnetic effects of current Lesson
  
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  Select activity Revision: Magnetic effects of current--Test
  
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Select section 13.Our Environment

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13.Our Environment
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  Eco Systems-What are its Components?
  
  Select activity Energy flow in food chains & webs
  
  Energy flow in food chains & webs Lesson
  
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  Select activity Eco Systems-What are its Components?--Test
  
  Eco Systems-What are its Components?--Test Quiz
  
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  How Do Our Activities affect the Environment
  
  Select activity Ozone layer and how it gets depleted
  
  Ozone layer and how it gets depleted Lesson
  
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  Select activity How Do Our Activities affect the Environment--Test
  
  How Do Our Activities affect the Environment--Test Quiz
  
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