CBSE Class 7 Science Chapter 6: Adolescence: A Stage of Growth and Change — Assertion & Reason
CBSE Class 7 Science Assertion & Reason
Expert crafted · Instant PDF download · 2026-27
The following Assertion and Reason questions are based on Chapter 6: Adolescence: A Stage of Growth and Change from the NCERT Class 7 Science textbook Curiosity. Each question has four options — read both the Assertion (A) and Reason (R) carefully before selecting your answer.
How to attempt Assertion & Reason questions:
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Assertion & Reason Questions
1
Assertion (A): Adolescence is a period of rapid growth and development typically occurring between 10 to 19 years of age.
Reason (R): During adolescence, the body prepares for adulthood by undergoing various physical, emotional, and behavioural changes.
Reason (R): During adolescence, the body prepares for adulthood by undergoing various physical, emotional, and behavioural changes.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Adolescence is the crucial transitional stage where a child's body develops the maturity and capabilities required for adulthood.
2
Assertion (A): Humans can reproduce immediately after they are born.
Reason (R): The human body needs to grow and reach a stage of maturity before it becomes capable of reproduction.
Reason (R): The human body needs to grow and reach a stage of maturity before it becomes capable of reproduction.
Answer: (d)
A is false, but R is true. Like most animals and plants, humans cannot reproduce immediately after birth; they must first grow and mature during childhood and adolescence.
3
Assertion (A): During adolescence, the voice of boys often becomes hoarse.
Reason (R): The voice box (larynx) grows larger in adolescent boys, sometimes visible as a bump called the Adam's apple.
Reason (R): The voice box (larynx) grows larger in adolescent boys, sometimes visible as a bump called the Adam's apple.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The physical enlargement of the voice box in boys directly causes the characteristic change and hoarseness in their voice.
4
Assertion (A): Adolescents frequently experience the appearance of acne and pimples on their faces.
Reason (R): There is a decrease in the secretion of oil from the skin during the adolescent years.
Reason (R): There is a decrease in the secretion of oil from the skin during the adolescent years.
Answer: (c)
A is true, but R is false. Acne occurs because there is an INCREASE in oily secretions from the skin during adolescence, which clogs pores and leads to infections.
5
Assertion (A): The growth of facial hair in boys and the development of breasts in girls are called secondary sexual characteristics.
Reason (R): These characteristic changes are directly involved in the process of reproduction.
Reason (R): These characteristic changes are directly involved in the process of reproduction.
Answer: (c)
A is true, but R is false. While these are secondary sexual characteristics, they are NOT directly involved in reproduction; rather, they help distinguish males from females.
6
Assertion (A): Puberty is the stage when the body undergoes internal and external changes to become capable of reproduction.
Reason (R): The timing, nature, and extent of changes during puberty are exactly the same for every individual.
Reason (R): The timing, nature, and extent of changes during puberty are exactly the same for every individual.
Answer: (c)
A is true, but R is false. The changes of puberty are a normal part of growing up, but their timing and extent vary significantly from one person to another.
7
Assertion (A): The menstrual cycle is a natural process and an important sign of good reproductive health in adolescent girls.
Reason (R): Menstruation involves the discharge of blood from the body and generally recurs every 28 to 30 days.
Reason (R): Menstruation involves the discharge of blood from the body and generally recurs every 28 to 30 days.
Answer: (b)
Both A and R are true, but R is NOT the correct explanation of A. While R correctly describes what menstruation is, it does not explain why it is a sign of good reproductive health.
8
Assertion (A): Menstruating girls should be physically isolated from others to maintain hygiene.
Reason (R): Menstruation is a natural biological process and myths regarding isolation have no scientific basis.
Reason (R): Menstruation is a natural biological process and myths regarding isolation have no scientific basis.
Answer: (d)
A is false, but R is true. Isolating menstruating girls is a harmful taboo. Menstruation is a completely natural and healthy process that requires good hygiene, not isolation.
9
Assertion (A): Adolescents may often experience mood swings and stronger emotions than during their childhood.
Reason (R): Adolescence is a transitional stage of life marked by complex physical and biological changes that influence emotions.
Reason (R): Adolescence is a transitional stage of life marked by complex physical and biological changes that influence emotions.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The intense physical and hormonal changes happening in an adolescent's body directly contribute to heightened emotions and mood swings.
10
Assertion (A): Adolescent girls should regularly consume iron-rich foods like spinach, kidney beans, and raisins.
Reason (R): Iron is an essential nutrient required for the formation of blood in the body.
Reason (R): Iron is an essential nutrient required for the formation of blood in the body.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Because iron is necessary for blood formation, a diet rich in iron prevents deficiencies that girls are particularly vulnerable to during adolescence.
11
Assertion (A): The human body can easily make its own Vitamin B12.
Reason (R): Vitamin B12 is essential for the proper functioning of the human body and must be obtained from food.
Reason (R): Vitamin B12 is essential for the proper functioning of the human body and must be obtained from food.
Answer: (d)
A is false, but R is true. Like most vitamins, the human body cannot manufacture Vitamin B12; it must be obtained entirely from dietary sources.
12
Assertion (A): Maintaining personal hygiene, especially in the armpits and pubic region, is crucially important during adolescence.
Reason (R): Proper body hygiene helps protect the body from potential infections.
Reason (R): Proper body hygiene helps protect the body from potential infections.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Due to increased sweat and hormonal changes, cleaning these areas prevents the buildup of bacteria and subsequent infections.
13
Assertion (A): Used sanitary pads should be disposed of by flushing them down the toilet.
Reason (R): Proper disposal involves wrapping the used pads in newspaper and throwing them inside a dustbin to ensure environmental cleanliness.
Reason (R): Proper disposal involves wrapping the used pads in newspaper and throwing them inside a dustbin to ensure environmental cleanliness.
Answer: (d)
A is false, but R is true. Flushing sanitary pads blocks plumbing systems. They must always be wrapped and disposed of in a dustbin.
14
Assertion (A): Engaging in regular sports and physical exercises is essential for adolescents.
Reason (R): Physical activities help build stamina, keep the body fit, and boost the mood.
Reason (R): Physical activities help build stamina, keep the body fit, and boost the mood.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Regular exercise supports the rapid physical growth occurring during this stage and promotes mental well-being.
15
Assertion (A): Cyberbullying involves harassing others by spreading false rumours or sharing personal information online without consent.
Reason (R): Adolescents should hide incidents of cyberbullying from their parents and teachers.
Reason (R): Adolescents should hide incidents of cyberbullying from their parents and teachers.
Answer: (c)
A is true, but R is false. Victims of cyberbullying should never hide it; they should act wisely and immediately seek help from trusted adults like parents or teachers.
16
Assertion (A): It is completely safe to try addictive substances like tobacco or alcohol just one time.
Reason (R): Addictive substances create a strong urge to consume them repeatedly, leading to substance abuse and severe health problems.
Reason (R): Addictive substances create a strong urge to consume them repeatedly, leading to substance abuse and severe health problems.
Answer: (d)
A is false, but R is true. Trying these substances even once is dangerous because their addictive nature can quickly lead to regular use and long-term abuse.
17
Assertion (A): Many physical and biological changes during adolescence are controlled by hormones.
Reason (R): Hormones are special chemicals produced in different parts of the body that regulate growth and development.
Reason (R): Hormones are special chemicals produced in different parts of the body that regulate growth and development.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. These chemical messengers are responsible for triggering and regulating the onset of puberty and its associated bodily changes.
18
Assertion (A): Menstruation continues throughout a woman's entire life without stopping.
Reason (R): Menstruation typically stops naturally by the age of 45-55, marking the end of reproductive capability.
Reason (R): Menstruation typically stops naturally by the age of 45-55, marking the end of reproductive capability.
Answer: (d)
A is false, but R is true. Menstruation is not a lifelong process; it ceases naturally during middle age, ending the reproductive phase of a woman's life.
19
Assertion (A): The Suvidha Sanitary Napkin Initiative provides free smartphones to adolescent girls.
Reason (R): This initiative provides biodegradable sanitary pads at affordable prices through Jan Aushadhi Kendras.
Reason (R): This initiative provides biodegradable sanitary pads at affordable prices through Jan Aushadhi Kendras.
Answer: (d)
A is false, but R is true. The Suvidha initiative has nothing to do with smartphones; it is a government scheme to improve access to affordable menstrual hygiene products.
20
Assertion (A): The Adam's apple is a prominent feature easily noticeable in the throat region of every single adolescent boy.
Reason (R): The voice box grows in adolescent boys, but the resulting bump is not noticeable in every individual.
Reason (R): The voice box grows in adolescent boys, but the resulting bump is not noticeable in every individual.
Answer: (d)
A is false, but R is true. While the voice box does grow in all boys, the Adam's apple bump varies in size and is not clearly noticeable in every boy.
❓ Frequently Asked Questions
What is covered in CBSE Class 7 Science Chapter 6 Adolescence: A Stage of Growth and Change?
This chapter covers all key topics from Adolescence: A Stage of Growth and Change as per CBSE 2026-27 syllabus.
Is this Assertion & Reason useful for CBSE board exams?
Yes, designed for CBSE Class 7 board exam preparation covering the complete syllabus.
Are these CBSE Class 7 Science Assertion & Reason updated for 2026-27?
Yes, all content at eBookPublisher is updated as per the latest 2026-27 CBSE syllabus.
How many chapters are in CBSE Class 7 Science?
All chapters of CBSE Class 7 Science are covered at eBookPublisher with free Assertion & Reason for each chapter.
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