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animate-books

NCERT Exploration Textbook of Science For Class 9th

by Madhurima
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  • Q1
    What is the basic unit of life according to Chapter 2?
    A1

    The cell is the basic structural and functional unit of life. All living organisms are composed of one or more cells.

  • Q2
    Define uniform circular motion with one example.
    A2

    Motion of an object along a circular path at constant speed. Example: a fan blade tip or a satellite orbiting Earth.

  • Q3
    How will you separate a mixture of sand and common salt?
    A3

    Dissolve in water, filter to remove sand, then evaporate the filtrate to obtain pure salt crystals.

  • Q4
    State Newton’s first law of motion.
    A4

    An object remains at rest or uniform motion unless acted by an external unbalanced force. Also called law of inertia.

  • Q5
    What is the relationship between work and energy?
    A5

    Work is the transfer of energy. When work is done on an object, energy is transferred to it, changing its state.

  • Q6
    Name the subatomic particles discovered inside an atom.
    A6

    Electrons (negative), protons (positive), and neutrons (neutral). Protons and neutrons reside in the nucleus.

  • Q7
    What does the atomic number of an element represent?
    A7

    It equals the number of protons in the nucleus of one atom. It uniquely identifies the element.

  • Q8
    Differentiate between asexual and sexual reproduction.
    A8

    Asexual involves one parent and no gamete fusion. Sexual involves two parents and fusion of male and female gametes.

  • Q9
    What is the basis of five-kingdom classification by Whittaker?
    A9

    Cell structure, body organization, mode of nutrition, reproduction, and phylogenetic relationships are key criteria.

  • Q10
    How does Earth’s biosphere interact with the lithosphere?
    A10

    Living organisms (biosphere) obtain minerals and nutrients from the Earth’s crust (lithosphere) and anchor roots or burrow into it.

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Have Doubts Regarding This Product ? Ask Your Question

  • Q1
    What is the basic unit of life according to Chapter 2?
    A1

    The cell is the basic structural and functional unit of life. All living organisms are composed of one or more cells.

  • Q2
    Define uniform circular motion with one example.
    A2

    Motion of an object along a circular path at constant speed. Example: a fan blade tip or a satellite orbiting Earth.

  • Q3
    How will you separate a mixture of sand and common salt?
    A3

    Dissolve in water, filter to remove sand, then evaporate the filtrate to obtain pure salt crystals.

  • Q4
    State Newton’s first law of motion.
    A4

    An object remains at rest or uniform motion unless acted by an external unbalanced force. Also called law of inertia.

  • Q5
    What is the relationship between work and energy?
    A5

    Work is the transfer of energy. When work is done on an object, energy is transferred to it, changing its state.

  • Q6
    Name the subatomic particles discovered inside an atom.
    A6

    Electrons (negative), protons (positive), and neutrons (neutral). Protons and neutrons reside in the nucleus.

  • Q7
    What does the atomic number of an element represent?
    A7

    It equals the number of protons in the nucleus of one atom. It uniquely identifies the element.

  • Q8
    Differentiate between asexual and sexual reproduction.
    A8

    Asexual involves one parent and no gamete fusion. Sexual involves two parents and fusion of male and female gametes.

  • Q9
    What is the basis of five-kingdom classification by Whittaker?
    A9

    Cell structure, body organization, mode of nutrition, reproduction, and phylogenetic relationships are key criteria.

  • Q10
    How does Earth’s biosphere interact with the lithosphere?
    A10

    Living organisms (biosphere) obtain minerals and nutrients from the Earth’s crust (lithosphere) and anchor roots or burrow into it.

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