Here is a quick visual recap of the chapter, followed by short definitions of every key term.

Concept Map

The concept map below shows how the chapter's main ideas connect. Each arrow is labelled with a phrase that tells you the relationship between the two concepts.

How to read this map: each arrow shows a relationship, and the phrase on the arrow tells you HOW two concepts are connected (e.g., "is classified as" , "is caused by" , "subtype is" ).
Legend Root concept Main category Property / outcome Sub-type / specific
is classified as includes is supported by is caused by leads to includes requires released via ADOLESCENCE Physical & Reproductive Changes Emotional & Behavioural Changes Healthy Practices (joyful adolescence) Hormones (the 'why') Body changes (height, voice, pimples, hair) Reproductive maturity (puberty, menstruation) Mood swings (varied feelings day-to-day) Strong emotions (sensitivity, compassion) 5 Pillars (diet, hygiene, activity, social) Avoid harm (substance abuse, cyberbullying) Brain signals (brain releases hormones that control growth)
ADOLESCENCE
Physical & Reproductive Changes
Body changes
(height, voice, hair)
Reproductive maturity
(Puberty)
Emotional & Behavioural
Mood swings
Strong emotions
(sensitivity)
Reproductive maturity ⇆ controlled by ⇆ Hormones
↓ Healthy practices & the 'why' ↓
Healthy Practices
5 Pillars
(diet, hygiene, activity, social, no harm)
Hormones (the 'why')
Brain signals
(release hormones)
↓ Sub-types ↓
Physical Changes
Pimples (acne) (oily skin)
Voice change (Adam's apple)
Menstruation (28–30 day cycle)
Things to Avoid
Substance abuse (tobacco, alcohol, drugs)
Cyberbullying (online harassment)

Key Terms and Definitions

Adolescence
It is the stage of development between childhood and adulthood. It usually starts around 10 years of age and can continue up to the age of 19 years.
Voice Box
It is a structure in our throat that helps us to speak. During adolescence in boys, it grows and may form a visible bump called the Adam's apple.
Adam's Apple
It is the bump in the throat region of adolescent boys, formed due to the growth of the voice box.
Acne
It is a skin condition during adolescence in which small, reddish pimples appear, commonly on the face. It occurs due to an increase in oily secretions that clog skin pores.
Pimples
They are the small, reddish spots on the skin and are a manifestation of the skin condition called acne.
Secondary Sexual Characteristics
They are the characteristic changes during adolescence that help distinguish males from females but are not directly involved in reproduction.
Puberty
It is the stage in which the body of an adolescent undergoes external and internal changes to develop into an adult capable of reproduction.
Menstrual Cycle
It is an important internal change in adolescent girls — a natural process that recurs generally every 28–30 days, more commonly known as 'the period'.
Menstruation
It is the phase of the menstrual cycle when blood discharge occurs from the body. It may last for three to seven days.
Mood Swings
It means rapid changes in emotions during adolescence — feeling very energetic and happy on some days, low on other days.
Substance Abuse
It is the harmful pattern where, once a person starts consuming addictive substances such as tobacco, alcohol, or drugs, they develop a strong urge to take them again and again, and start using them regularly.
Cyberbullying
It involves the use of digital devices such as phones, computers, or online platforms to harass others by sending misleading messages, spreading false rumours, or sharing personal information without consent.
Sanitary Pad
It is a product designed to maintain menstrual hygiene by absorbing menstrual flow. Reusable cloth pads and biodegradable sanitary pads are also available.
Hormones
They are certain chemicals produced in our bodies. They regulate various aspects of growth and development, and are released in response to signals from the brain.
Nasha Mukt Bharat Abhiyaan
It is the Drug-Free India Campaign launched by the Ministry of Social Justice and Empowerment to spread awareness about avoiding substance abuse. The National De-addiction Helpline is 14446.
Menstrual Hygiene Scheme (MHS)
It is a Government of India scheme that provides sanitary pads free of charge or at a reduced price to adolescent girls in rural areas, along with awareness programmes.
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