** UPDATED CBSE CLASS X Science Syllabus: 2018-19

    CBSE Class 10th Science Syllabus, CBSE Class 10th Science Syllabus 2018, Xth Class Science Theory Syllabus, Xth Class Science Practical Syllabus, Syllabus of Class X Science Syllabus
    CBSE Class X Science Syallabus 2018-19

    Hi friends, today we are going to discuss you the latest Syllabus for Class 10 Science Syllabus. As you know very well that Central Board of Secondary Education (CBSE) has its own curriculum and they hold the supreme authority to change it further for the benefit of students.

    CBSE CLASS X Science Syllabus 2018-19, CBSE Class 10th Science Syllabus, CBSE Class 10th Science Syllabus 2018, Xth Class Science Theory Syllabus, Xth Class Science Practical Syllabus, Syllabus of Class X Science Syllabus
    CBSE CLASS X Science Syllabus 2018-19

    So it’s always a wise decision to keep an eye on what happening around with the subject you are going to learn. This year CBSE made little bit changes in class X Science syllabus. Let us have a look at the updated CBSE class 10 Science Syllabus for the academic year 2017-18

    CBSE class 10 Science Syllabus (2018-19 Session)

    Course Structure Class – X
    (Annual Examination)

    Unit No. Unit Marks
    I Chemical Substances – Nature and Behaviour 25
    II World of Living 23
    III Natural Phenomena 12
    IV Effects of Current 13
    V Natural Resources 07
    Total 80
    Internal assessment 20
    Grand Total 100

    Note: Above weightage includes the weightage of questions based on practical skills.
    Theme: Materials
    Unit I: Chemical Substances – Nature and Behaviour (55 Periods)
    Chemical reactions: Chemical equation, Balanced chemical equation, an implication of a balanced chemical equation, types of chemical reactions: Combination, decomposition, displacement, double displacement, precipitation, neutralization,
    oxidation and reduction.
    Acids, bases, and salts: Their definitions in terms of furnishing of H+ and OH- ions, General properties, examples and uses, concept of pH scale (Definition relating to logarithm not required), the importance of pH in everyday life; preparation and uses of Sodium Hydroxide, Bleaching powder, Baking soda, Washing soda and Plaster of Paris.
    Metals and nonmetals: Properties of metals and non-metals; Reactivity series; Formation and properties of ionic compounds; Basic metallurgical processes; Corrosion and its prevention.
    Carbon compounds: Covalent bonding of carbon compounds. Versatile nature of carbon. Homologous series. Nomenclature of carbon compounds containing functional groups (halogens, alcohol, ketones, aldehydes, alkanes, and alkynes), a difference between saturated hydrocarbons and unsaturated hydrocarbons. Chemical properties of carbon compounds (combustion, oxidation, addition and substitution reaction). Ethanol and Ethanoic acid (only properties and uses), soaps and detergents.
    Periodic classification of elements: Need for classification, Early attempts at a classification of elements (Dobereiner’s Triads, Newland’s Law of Octaves, Mendeleev’s Periodic Table), Modern periodic table, gradation in properties,
    valency, atomic number, metallic and non-metallic properties.

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    Theme: The World of the Living
    Unit II: World of Living (50 Periods)
    Life processes: ‘Living Being’. A basic concept of nutrition, respiration, transport, and excretion in plants and animals.
    Control and co-ordination in animals and plants: Tropic movements in plants; Introduction of plant hormones;
    Control and co-ordination in animals; Nervous system; Voluntary, involuntary and reflex action; Chemical co-ordination: animal hormones.
    Reproduction: Reproduction in animals and plants (asexual and sexual) reproductive health-need and methods of family planning. Safe sex vs HIV / AIDS. Childbearing and women’s health.
    Heredity and Evolution: Heredity; Mendel’s contribution – Laws for an inheritance of traits: Sex determination: brief introduction; Basic concepts of evolution.

    Theme: Natural Phenomena
    Unit III: Natural Phenomena (23 Periods)
    Reflection of light by curved surfaces; Images formed by spherical mirrors, center of curvature, principal axis, principal focus, focal length, mirror formula (Derivation not required), magnification.
    Refraction; Laws of refraction, refractive index.
    Refraction of light by a spherical lens; Image formed by spherical lenses; Lens formula (Derivation not required); Magnification. Power of a lens.
    Functioning of a lens in the human eye, defects of vision and their corrections,
    applications of spherical mirrors and lenses.
    Refraction of light through a prism, dispersion of light, scattering of light, applications in daily life.

    Theme: How Things Work
    Unit IV: Effects of Correct (32 Periods)
    Electric current, potential difference, an electric current. Ohm’s law; Resistance, resistivity, Factors on which the resistance of a conductor depends. Series combination of resistors, a parallel combination of resistors and its applications in daily life. Heating effect of electric current and its applications in daily life. Electric power, Interrelation between P, V, I and R.
    Magnetic effects of current: Magnetic field, field lines, field due to a current carrying conductor, field due to current carrying coil or solenoid; Force on current carrying conductor, Fleming’s Left-Hand Rule, Electric Motor, Electromagnetic induction. The induced potential difference, Induced current. Fleming’s Right Hand A rule, Electric Generator, Direct Current. Alternating current: frequency of AC. An advantage of AC over DC. Domestic electric circuits.

    Theme: Natural Resources
    Unit V: Natural Resources (20 Periods)
    Sources of energy: Different forms of energy, conventional and non-conventional sources of energy: Fossil fuels, solar energy; biogas; wind, water, and tidal energy; Nuclear energy. Renewable versus non-renewable sources of Energy.
    Out environment: Eco-system, Environmental problems, Ozone depletion, waste production and their solutions. Biodegradable and non-biodegradable substances. Management of natural resources: Conservation and judicious use of natural resources. Forest and wildlife; Coal and Petroleum conservation. Examples of people’s participation in the conservation of natural resources. Big dams: advantages and limitations; alternatives, if any. Water harvesting. Sustainability of natural resources.


    Practicals should be conducted alongside the concepts taught in theory classes.
    List of Experiments
    1. Finding the pH of the following samples by using pH paper / universal indicator:
    a) Dilute Hydrochloric Acid
    b) Dilute NaOH solution
    c) Dilute Ethanoic Acid Solution
    d) Lemon juice
    e) Water
    f) Dilute Hydrogen Carbonate solution
    Studying the properties of acids and bases (HCl & NaOH) by their reaction with:
    a) Litmus solution (Blue/Red)

    b) Zinc metal
    c) Solid sodium carbonate
    2. Performing and observing the following reactions and classifying them into :
    a) Combination reaction
    b) Decomposition reaction
    c) Displacement reaction
    d) Double displacement reaction
    (i) Action of water on quicklime
    (ii) Action of heat on ferrous sulfate crystals

    (iii) Iron nails kept in copper sulfate solution
    (iv) Reaction between sodium sulfate and barium chloride solutions


    3. Observing the action of Zn, Fe, Cu and Al metals on the following salt solutions :
    a) ZnSO4
    b) FeSO4
    c) CuSO4
    d) Al2

    Arranging Zn, Fe, Cu and Al (metals) in the decreasing order of reactivity based on
    the above result.
    4. Studying the dependence of potential difference (V) across a resistor on the
    current (I) passing through it and determine its resistance. Also plotting a graph
    between V and I.
    5. Determination of the equivalent resistance of two resistors when connected in
    series and parallel.
    6. Preparing a temporary mount of a leaf peel to show stomata.
    7. Experimentally show that carbon dioxide is given out during respiration.
    8. Study of the following properties of acetic acid (ethanoic acid) :
    i) odour
    ii) solubility in water
    iii) effect on litmus
    iv) reaction with sodium Hydrogen Carbonate
    9. Study of the comparative cleaning capacity of a sample of soap in soft and hard water.
    10. Determination of the focal length of :
    i) Concave mirror
    ii) Convex lens
    by obtaining the image of a distant object.
    11. Tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. Measure the angle of incidence, an angle of refraction, an angle of emergence and interpret the result.
    12. Studying (a) binary fission in Amoeba, and (b) budding in yeast with the help of
    prepared slides.
    13. Tracing the path of the rays of light through a glass prism.
    14. Finding the image distance for varying object distances in case of a convex lens and drawing corresponding ray diagrams to show the nature of image formed.
    15. Identification of the different parts of an embryo of a dicot seed (Pea, gram or red kidney bean).


    Class – IX & X (2017-18)

    Time : 3 Hours Max. Marks: 80
    S.No. Typology of Questions Very Short Answer (VSA) 1 Mark Short Answer – I (SAI) 2 Marks Short Answer – II (SAII) 3 Marks Long Answer (LA) 5 Marks Total Marks % Weight age
    1 Remembering (Knowledge-based simple recall questions, to know specific facts, terms, concepts, principles, or theories, Identify, define or recite, information) 2 1 1 10 15%
    2 Understanding (Comprehension – to be familiar with the meaning and to understand conceptually, interpret, compare, contrast, explain, paraphrase, or interpret information) 1 4 2 24 35%
    3 Application (Use the abstract information in a concrete situation, to apply knowledge to new situations, use given content to interpret a situation, provide an example or solve a problem) 1 2 2 18 26%
    4 High Order Thinking Skills (Analysis & Synthesis – Classify, compare, contrast or differentiate between different pieces of information, organize and/or integrate unique pieces of information from a variety of sources) 1 1 8 12%
    5 Inferential and Evaluative (Appraise, judge and/or justify the value or worth of a decision or outcome, or to predict outcomes based on values) 1 1+1* 8 12%
    Total (Theory Based Questions) 2×1=2 3×2=6 10×3=30 6×5=30 68(21) 100%
    Practical Based Questions (PBQs) 6×2=12 12(6)
    Total 2×1=2 9×2=18 10×3=30 6×5=30 80(27)

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