Educational Galaxy

Chapter 6: Adolescence: A Stage of Growth and Change — EG's own notes, in simple words

Book: Curiosity (CBSE, Class 7)  |  Chapter 6  |  Medium: English

Diagram (labels are printed on the image): Healthy habits for adolescents: balanced food, exercise and hygiene. A general picture; it is not a scene from the book.

Teenagers playing sports outdoors. A general picture about healthy growth, not a book scene.

What the chapter is about

Adolescence is the stage of life between childhood and adulthood, roughly from about 11 to 19 years of age. It is a time of fast growth and many changes in the body, in feelings and in thinking. Everyone grows at a different speed, so there is no need to compare yourself with friends; differences in height, voice or timing are normal.

During adolescence, the body begins to change under the control of hormones, which are chemical messengers made by glands in the body. These changes are called secondary sexual characters: for example, growth of hair, change of voice, and development of the reproductive organs. Girls usually begin this stage a little earlier than boys. Height increases quickly, sweat and oil glands become more active, and pimples are common; washing regularly and eating balanced food help.

Adolescence also brings changes in the mind. Young people want more independence, care more about friends' opinions, and may feel strong emotions or mood swings. These feelings are normal. Balanced food, regular exercise, enough sleep, good hygiene and talking openly with trusted adults help a teenager grow in a healthy way.

6.1 Growing with age

A plant begins as a seed, becomes a sapling and then a mature plant that can make seeds of its own — but a seedling cannot make seeds at once; it must grow to maturity first. Animals are the same: they must grow and mature before they can reproduce. In humans, the years from about 11 to 19 are adolescence, the stage between childhood and adulthood, and growth during these years is faster and more wide-ranging than at any time since early childhood.

6.2 Changes that indicate reproductive capability

Many changes of adolescence are driven by hormones — chemicals produced in the body that regulate growth and development. Secondary sexual characteristics appear: in boys, the voice box grows, making the voice hoarse, and the growth shows as a bump in the throat called the Adam's apple; facial hair, moustache and hair in the armpits and pubic region grow. In girls, breasts develop and hair grows in the armpits and pubic region. In both boys and girls, height increases rapidly, pimples (acne) may appear on the face as skin glands become more active, and sweat glands become more active too.

In girls, menstruation begins: a discharge of blood that generally occurs every 28–30 days and lasts about three to seven days, sometimes with pain or discomfort in the lower abdomen. It is a normal sign of reproductive health, not an illness and not something to be ashamed of. Usually between the ages of 45 and 55, menstruation stops naturally. The chapter's neck-bulge exercise makes an important distinction: a girl with a neck bulge who is advised an iodine-rich diet may have a thyroid-related problem, while a boy's neck bump at 12 may simply be his growing Adam's apple — the same sign can mean different things, which is why a doctor's advice matters.

6.3 Emotional and behavioural changes

Adolescence brings emotional and behavioural changes as well as physical ones: mood swings — feeling very energetic and happy on some days and low on others — greater sensitivity, a wish for independence, and stronger influence from friends. These are normal, but they also make this a vulnerable age: the chapter is direct that adolescents should say NO to alcohol and drugs, which are addictive — trying them even once can make it hard to stop, whatever friends may claim.

6.4 Making adolescence a joyful experience

A joyful adolescence rests on four habits. First, nutritional needs: growing bodies need a balanced diet with enough iron, calcium, iodine and other nutrients — iodised salt is one everyday source of iodine. Second, personal hygiene: regular bathing, clean clothes, and menstrual hygiene — changing sanitary pads regularly and disposing of them properly in a bin, not scattering them, which the chapter's Mohini exercise discusses. Third, physical activities: regular exercise and play keep the body fit and the mood steady. Fourth, a balanced social life: being polite and respectful to others, keeping good company, and talking to trusted adults or friends when worried.

What you should learn

Learn that adolescence is a normal stage of growth controlled by hormones, that its timing differs from person to person, and that healthy habits support it.

• Name the physical, emotional and behavioural changes of adolescence.
• Explain menstruation, hormones and the Adam's apple in simple, correct words.
• List the four habits that make adolescence joyful, including menstrual hygiene.

Chart / Table: Changes during adolescence

Table: Changes during adolescence

Practice set — try it yourself

1. What age range does adolescence roughly cover?
   Hint: Think about the years between childhood and adulthood.
2. What are hormones?
   Hint: Think about chemical messengers.
3. Why do teenagers grow at different speeds?
   Hint: Think about normal variation.
4. Name two healthy habits for adolescents.
   Hint: Think about food, exercise, sleep or hygiene.
5. Why are pimples common in adolescence?
   Hint: Think about oil glands becoming active.

Questions with Answers

1. What is adolescence?
   Adolescence is the stage of life between childhood and adulthood, roughly from 11 to 19 years. It is a period of rapid physical growth and of changes in feelings and thinking.
2. What role do hormones play in adolescence?
   Hormones are chemical messengers made by glands. At puberty, they trigger changes such as growth spurts, voice change, hair growth and development of the reproductive organs.
3. Why should teenagers not worry if they grow at a different speed from their friends?
   The timing and speed of puberty differ naturally from person to person. Girls often begin earlier than boys, and height and other changes appear at different times. Such differences are normal.
4. Name three healthy habits for adolescents and explain why each helps.
   A balanced diet gives nutrients for fast growth. Regular exercise keeps bones and muscles strong. Enough sleep supports growth and learning. Good hygiene, like washing, controls sweat and pimples.
5. What are secondary sexual characters? Give two examples.
   They are the changes that appear at puberty and mark maturity, other than the reproductive organs themselves. Examples are change of voice and growth of facial and body hair.

More questions with answers — extension

1. Unscramble: (i) The discharge of blood in adolescent girls every 28–30 days is nstmnoiaretu. (ii) Hoarseness in boys' voices is due to an enlarged iceov xob. (iii) Secondary sexual characteristics mark the onset of urtypeb. (iv) Say NO to lahoclo and srugd.
   (i) menstruation (ii) voice box (iii) puberty (iv) alcohol and drugs. Each word names a core idea of the chapter: the cycle, the voice change, the stage itself, and the substances to refuse.
2. Shalu says: “Adolescence brings only physical changes, like growing taller or developing body hair.” Is she correct? What would you change in her description?
   No. Adolescence also brings emotional and behavioural changes — mood swings, sensitivity, a wish for independence and stronger peer influence — and it is driven by hormones. A correct description mentions physical, emotional and behavioural changes together.
3. Some students claim: (i) Adolescents do not need to worry about behavioural changes. (ii) If someone tries a harmful substance once, they can stop anytime. What questions would you ask to check these claims?
   For (i): if mood swings and peer pressure are normal, do they still affect studies, friendships and safety — and who can help? For (ii): if a substance is addictive, what does addictive mean, and can a first try really be controlled? Both claims fail because they treat real risks as unimportant.
4. Besides mood swings, what other behavioural changes are associated with adolescence?
   Greater sensitivity to comments and criticism, a stronger wish for independence and privacy, wanting to spend more time with friends, testing rules, and being more influenced by peer opinion — all normal, and all easier to handle with trusted adults to talk to.
5. Mohini finds used sanitary pads scattered near a toilet bin and is upset. What menstrual hygiene and sanitary habits would you suggest to friends?
   Change pads regularly, wash hands, wrap a used pad in paper before putting it in the bin, never scatter pads or flush them, and keep the toilet area clean for the next person. Menstruation is normal and healthy; keeping it hygienic protects everyone's comfort and dignity.
6. Mary, 11, develops a bulge on the front of her neck; her doctor advises an iodine-rich diet. Manoj, 12, develops a similar bump; his doctor says it is part of growing up. Why might the advice differ?
   Mary's bulge may be a thyroid-related swelling linked to iodine deficiency, which an iodine-rich diet helps. Manoj's bump is likely his growing voice box — the Adam's apple — a normal part of male puberty. The same visible sign can have different causes, so only a doctor's examination can tell them apart.
7. Categorise: voice change, breast development, moustache growth, facial hair growth, pimples, hair in pubic region, hair in armpits — into only-boys, only-girls, and common.
   Only boys: voice change, moustache growth, facial hair growth. Only girls: breast development. Common: pimples, hair in pubic region, hair in armpits. (The chapter's full table also places rapid height increase and mood swings in the common column.)
8. Prepare the contents of a poster of tips for adolescents to live a healthy lifestyle.
   Eat a balanced diet with iron, calcium and iodine; exercise and play regularly; keep clean and practise menstrual hygiene; sleep enough; be polite and respectful; spend time with good company; talk to trusted adults when worried; and say NO to alcohol and drugs.
9. Why does the chapter compare a growing plant with a growing human? What is the comparison's limit?
   Both must reach maturity before they can reproduce: a seedling cannot make seeds at once, just as a child cannot reproduce. The limit is that human adolescence also involves emotions, behaviour, learning and social life — things a plant does not have — so the comparison covers growth and maturity, not the whole experience.

How to use this page: Read the summary, say the Key Terms in your own words, then try the practice set without looking. Use the Questions with Answers to check yourself afterwards. Ask your teacher or parent to check your answers.