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List changes in the body that take place at puberty.

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NCERT Solutions for Class 8 Science Chapter 10
Important NCERT Questions
8th Chapter 10 Reaching the Age of Adolescence
NCERT Books for Session 2022-2023
CBSE Board and State Board
Questions No: 4

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  1. 1. Physical Changes:
    – Development of secondary sexual characteristics: Breast development in girls; growth of facial, underarm, and pubic hair in boys and girls.
    – Growth spurt: Rapid increase in height and weight.
    – Alterations in body shape: Girls experience wider hips, while boys experience broader shoulders.
    – Maturation of genitals: Enlargement of testes and penis in boys; growth of the uterus and vagina in girls.
    – Voice changes: Boys experience a deepening voice due to the growth of the larynx (Adam’s apple).
    – Skin changes: Increased oil production leading to acne; heightened sweat production causing body odor.

    2. Emotional and Psychological Changes:
    – Mood swings and heightened emotional sensitivity.
    – Increased curiosity and interest in relationships and sexuality.
    – Growing need for independence and self-identity exploration.
    – Advancements in cognitive abilities and thought processes.

    These changes are primarily triggered by hormonal shifts, particularly the release of estrogen and testosterone, signifying the transition from childhood to adulthood.

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  2. Common changes occur among boys and girls during puberty:
    • Sudden increase in height.
    • Change in body shape.
    • Change in voice. In boys voice becomes deep and harsh, in girls it is high pitched voice.
    • Increased activity of sweat and sebaceous glands.
    • Reproductive organs begin to mature.
    • Appearance of secondary sexual characteristics.
    Changes in Boys during puberty:
    •Facial hairs such as beard and moustaches develop.
    • Hair develops under the armpit, under chest and in the pubic regions.
    • Voice becomes deeper.
    • Muscles develop, and shoulder becomes broad.
    • Increase in weight.
    Changes in Girls during puberty:
    • Development and enlargement of breasts.
    • Hair develops under the armpit and in the pubic regions.
    • Hips broaden and pelvic region widens.
    • Initiation of menstrual cycle.
    • Deposition of fat around hips.

    https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-10/

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