Adolescence: A Stage of Growth and Change
Adolescence: A Stage of Growth and Change — Study Notes
NCERT-aligned · 12 notes · 3 shown free
Adolescence: A Stage of Growth and Change
ExplanationAdolescence: A Stage of Growth and Change
The chapter begins by drawing a parallel between the growth journey of a plant and that of animals, including humans. Just as a seed germinates and grows into a mature plant capable of producing flowers, fruits, and seeds, animals too undergo growth and development before reaching maturity. This maturity is essential for reproduction. For example, a seedling cannot produce seeds immediately after germination; it must grow into a mature plant first. Similarly, animals, including humans, cannot reproduce immediately after birth; they must grow and develop to reach reproductive capability. The life journey of a human is divided into stages: infancy, childhood, adolescence, adulthood, and old age. These stages vary in duration and pace among individuals. Up to about 10–12 years of age, physical changes mainly involve height and weight. After this, adolescence begins, characterized by rapid growth and development, usually between ages 10 and 19. During adolescence, the body prepares for adulthood and reproductive capability. Adolescence involves physical, emotional, and behavioral changes, some visible and others internal. Understanding these changes helps adolescents manage this phase responsibly.
- Growth and development are necessary before reproduction in plants and animals.
- Human life is divided into five stages: infancy, childhood, adolescence, adulthood, and old age.
- Adolescence typically occurs between ages 10 and 19 and is a period of rapid growth.
- Physical changes before adolescence mainly involve height and weight.
- Adolescence prepares the body for adulthood and reproduction.
- Changes during adolescence include physical, emotional, and behavioral aspects.
- 📌 Adolescence: The transitional stage from childhood to adulthood marked by rapid growth and development.
- 📌 Maturity: The stage at which an organism can reproduce.
- 📌 Reproduction: The biological process by which new individual organisms are produced.
6.1 Growing With Age: The Teenage Years
Explanation6.1 Growing With Age: The Teenage Years
This section introduces adolescence through an interactive activity involving students observing changes among their peers from Grades 5 to 8. Students write down observable changes related to height, strength, behavior, and appearance anonymously on slips of paper. These are collected, mixed, and discussed collectively to identify common changes during adolescence. The activity helps students recognize that adolescence is a stage of development between childhood and adulthood, typically starting around age 10 and continuing until about 19. Observable changes include increased height, weight gain, changes in body structure such as broader shoulders in boys and breast development in girls, changes in voice, hair growth in various body parts, and skin changes like pimples. The section emphasizes that the timing and extent of these changes vary among individuals and are completely normal. These changes are part of the body's preparation for adulthood and reproduction.
- Adolescence is a developmental stage between childhood and adulthood, usually from 10 to 19 years.
- Common changes include increase in height, weight, and strength.
- Boys develop broader shoulders and chest; girls develop breasts.
- Voice changes occur, especially in boys due to growth of the voice box (Adam's apple).
- Hair appears in armpits, pubic area, and facial hair in boys.
- Pimples (acne) appear due to increased oily secretions during adolescence.
- 📌 Secondary sexual characteristics: Physical features that distinguish males and females but are not directly involved in reproduction.
- 📌 Puberty: The stage during adolescence when the body undergoes changes to become capable of reproduction.
- 📌 Acne: A skin condition common during adolescence caused by oily secretions clogging pores.
6.2 Changes that Indicate Reproductive Capability
Explanation6.2 Changes that Indicate Reproductive Capability
This section explains the internal changes during adolescence that indicate reproductive maturity. Both boys and girls experience gradual maturation of reproductive organs. A key internal change in girls is the onset of the menstrual cycle, commonly
Practice Questions — Adolescence: A Stage of Growth and Change
Includes NCERT exercise questions with answers
Q1.1. Ramesh, an 11-year-old boy, developed a few pimples on his face. His mother told him that this is because of ongoing biological changes in his body. (i) What could be the possible reasons for the development of these pimples on his face? (ii) What can he do to get some relief from these pimples?
Answer:
(i) The possible reasons for the development of pimples on Ramesh's face are the hormonal changes occurring during adolescence. These hormones increase the activity of oil glands in the skin, leading to pimples. (ii) To get relief from pimples, Ramesh should maintain good personal hygiene by washing his face regularly with a mild cleanser, avoid touching or squeezing pimples, eat a balanced diet, and keep himself hydrated. If pimples persist, he may consult a doctor or dermatologist.
Explanation:
During adolescence, increased secretion of hormones stimulates oil glands, causing pimples. Proper hygiene and care reduce bacterial growth and inflammation, helping to manage pimples.
Q2.2. Which of the following food groups would be a better option for adolescents and why? (i) [Image of food group (i)] (ii) [Image of food group (ii)]
Answer:
The better option for adolescents is food group (ii) because it contains a balanced variety of nutrients including proteins, vitamins, minerals, and carbohydrates which are essential for growth and development during adolescence. Food group (i) may lack some essential nutrients or be less balanced. Adolescents require a balanced diet to support rapid physical and biological changes.
Explanation:
Adolescents need a balanced diet rich in proteins, vitamins, and minerals to support growth spurts and hormonal changes. Choosing a diverse food group ensures adequate nutrition.
Q3.3. Unscramble the underlined word in the following sentences: (i) The discharge of blood in adolescent girls which generally occurs every 28-30 days is nstmnoiaretu. (ii) The hoarseness in the voice of adolescent boys is due to enlarged iceov xob. (iii) Secondary sexual characteristics are natural signs that the body is preparing for adulthood and mark the onset of urtypeb. (iv) We should say NO to lahoclo and srugd as they are addictive.
Answer:
(i) menstruation (ii) voice box (iii) puberty (iv) alcohol and drugs Explanation: (i) 'nstmnoiaretu' unscrambles to 'menstruation', the monthly discharge of blood. (ii) 'iceov xob' unscrambles to 'voice box', which enlarges causing hoarseness. (iii) 'urtypeb' unscrambles to 'puberty', the stage of physical changes. (iv) 'lahoclo' and 'rsugd' unscramble to 'alcohol' and 'drugs', substances to avoid.
Explanation:
Unscrambling the letters gives the correct scientific terms related to adolescence and health.
Q4.4. Shalu told her friend, "Adolescence brings only physical changes, like growing taller or developing body hair." Is she correct? What would you change in this description of adolescence?
Answer:
Shalu is not correct. Adolescence brings not only physical changes but also emotional and behavioural changes. Adolescents may experience mood swings, changes in thinking, and social behaviour along with physical growth.
Explanation:
Adolescence is a period of physical, emotional, and behavioural changes. Limiting it to physical changes ignores important psychological development.
Q5.5. During a discussion in the class, some of the students raised the following points. What questions would you ask them to check the correctness of these points? (i) Adolescents do not need to worry about behavioural changes. (ii) If someone tries a harmful substance once, they can stop anytime they want.
Answer:
(i) Question to ask: Why do you think behavioural changes during adolescence are not important? Are you aware that these changes can affect emotions and relationships? (ii) Question to ask: Do you know that harmful substances can cause addiction? Can everyone stop using them easily once they start?
Explanation:
These questions encourage critical thinking about the importance of behavioural changes and the risks of addiction.
Q6.6. Adolescents sometimes experience mood swings. On some days, they feel very energetic and happy, while on other days, they may feel low. What other behavioural changes are associated with this age?
Answer:
Other behavioural changes during adolescence include increased sensitivity, desire for independence, changes in sleep patterns, increased interest in peer relationships, experimentation, and sometimes risk-taking behaviour.
Explanation:
Hormonal changes affect mood and behaviour, leading to various emotional and social adjustments during adolescence.
All 12 Chapters in Curiosity
Science · Class 7