Class 7 Science Chapter 6 Solutions: Adolescence – A Stage of Growth and Change

1. Multiple choice questions.

1. Adolescence is the period between the ages of:

• (a) 8 and 16 years
• (b) 10 and 19 years
• (c) 13 and 18 years
• (d) 20 and 25 years

Answer: (b) 10 and 19 years.

2. The onset of menstruation in girls is termed as:

• (a) Menopause
• (b) Adolescence
• (c) Menarche
• (d) Puberty

Answer: (c) Menarche.

3. The hormone responsible for changes in males during adolescence is:

• (a) Estrogen
• (b) Progesterone
• (c) Testosterone
• (d) Insulin

Answer: (c) Testosterone.

2. Answer the following questions in about 30 words.

1. Which are the main stages of human life?

Answer: The main stages of human life are infancy, childhood, adolescence, adulthood, and old age. Each stage is marked by specific physical, emotional, and social changes.

2. What changes mark the onset of adolescence in boys and girls?

Answer: Onset of adolescence is marked by rapid increase in height, growth of hair in new areas, voice changes, development of sex organs, and the onset of menstruation in girls and ejaculation in boys.

3. Why is personal hygiene important during adolescence?

Answer: Personal hygiene is crucial during adolescence due to increased sweat and oil secretion, puberty changes, and, for girls, menstruation. It prevents infections and promotes health and confidence.

4. Why should adolescents avoid drugs and tobacco?

Answer: Adolescents should avoid drugs and tobacco as these substances harm physical and mental health, hinder growth and development, and can become addictive, leading to long-term consequences.

3. Answer the following questions in about 150 words.

1. Explain how hormones control changes during adolescence. Why is it important to maintain a balanced life during this stage?

Answer: Hormones are chemical messengers produced by endocrine glands in our body. During adolescence, hormones like testosterone in boys and estrogen in girls are released, triggering changes such as increased height, voice changes, development of secondary sexual characteristics, and maturation of reproductive organs. These hormones are responsible for emotional and behavioural changes as well. It is important for adolescents to maintain a balanced life—eat a nutritious diet, exercise, keep good personal hygiene, and avoid drugs. This ensures healthy growth, better emotional regulation, and reduces the risk of infections or bad habits. Adolescents should also seek guidance from elders and health professionals when needed, as this is a crucial stage for their future health and development.

2. Describe the importance of menstrual hygiene and the government's role in promoting it among adolescent girls.

Answer: Menstrual hygiene is essential for adolescent girls to avoid infections and maintain overall health during menstruation. Using clean and safe sanitary products, changing them regularly, and maintaining cleanliness prevents reproductive tract infections. The government plays an important role by providing affordable sanitary pads, spreading awareness on menstrual health, and ensuring girls have access to necessary facilities. Through campaigns and school programs, they help reduce stigma associated with menstruation, promote correct practices, and encourage girls to continue their education without interruption.

4. Match the following.

Understanding Adolescence: A Stage of Growth and Change

Grasping the main concepts of adolescence helps students know why this stage is so unique. This chapter explains rapid growth and development during ages 10–19, guiding students to understand physical, emotional, and social changes.

Key topics include the role of hormones, importance of personal hygiene, and healthy lifestyle tips for adolescents. Mastering these points not only boosts exam scores but also builds real-life awareness on handling changes responsibly.

Practice answering NCERT-based questions and review highlighted sections for better retention. Focusing on balanced diet, personal hygiene, and positive activities ensures success both in exams and in everyday life as an adolescent.