Reaching the Age of Adolescence — Class 8 MCQs with Answers
Class 8 CBSE Science · Chapter 107
Pre-2026 syllabusThis chapter is from the older NCERT book. See the 2026-27 Class 8 Science chapters →
72 practice questions · 24 Easy · 24 Medium · 24 Hard · Updated
Jump to the 6 solved questions
Practise the most important Class 8 CBSE Science questions from Chapter 107, "Reaching the Age of Adolescence". You get 6 timed quizzes made from 72 NCERT-based MCQs, with answers and explanations. The questions are split into 24 Easy, 24 Medium and 24 Hard. Warm up on the basics, then move on to the exam-level questions that top scorers in CBSE Board exams get right.
To score well in "Reaching the Age of Adolescence", focus on clear concepts in physics, chemistry and biology basics. Each MCQ here is timed and uses exam-style marking (+4 correct, −1 wrong, 0 skipped). This helps you stay accurate when time is short, just as real papers need. Every question has a short explanation, so a wrong answer becomes a quick lesson. It is the fastest way to fix gaps before a test.
Use this chapter for focused revision. Start with the Easy set to check your basics on Reaching the Age of Adolescence, then move to Medium and Hard to practise applying them. Your accuracy, streaks and XP save automatically. This chapter also adds to your overall Class 8 Science mastery score. Try the 6 sample questions below: tap an option to see the answer and a worked explanation. Sign in free to start practising.
Reaching the Age of Adolescence — important questions & MCQs with answers (Class 8 Science)
6 solved questions from this chapter's difficulty levels, each with its answer and explanation. Tap an option to check yourself.
0 of 6 answered
- Q1 of 6Easy
The period of life between about 11 and 19 years of age is called:
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Answer: Adolescence
Explanation: Adolescence is the stage from about 11 to 19 years, between childhood and adulthood.
- Q2 of 6Easy
The most noticeable change at puberty is a sudden increase in:
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Answer: Height
Explanation: A sudden increase in height (growth spurt) is a clear change during puberty.
- Q3 of 6Medium
How do hormones reach the organs they act on?
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Answer: Through the bloodstream, since endocrine glands have no ducts
Explanation: Ductless endocrine glands release hormones into the blood, which carries them to target organs.
- Q4 of 6Medium
Why is the father, not the mother, responsible for determining the sex of the child?
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Answer: The mother's eggs all carry X; the father's sperm carry either X or Y, deciding the sex
Explanation: Eggs always carry X; whether the sperm carries X (girl) or Y (boy) determines the child's sex.
- Q5 of 6Hard
Why is a protein- and mineral-rich diet more important during adolescence than during old age?
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Answer: Adolescents undergo rapid growth and development that demand more building nutrients
Explanation: Fast growth in adolescence needs extra proteins and minerals to build new tissues and bones.
- Q6 of 6Hard
Why might two healthy classmates of the same age differ greatly in height and development?
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Answer: Puberty and its growth spurt begin at different ages in different individuals
Explanation: The timing of puberty varies between individuals, so peers may differ in growth at the same age.
Reaching the Age of Adolescence notes: key concepts (Class 8 Science)
This chapter covers adolescence and puberty — the physical and hormonal changes, the role of hormones, and reproductive health.
- Adolescence & puberty
- Adolescence is the period of growth from about 11 to 18/19 years; puberty brings the ability to reproduce.
- Changes at puberty
- Increase in height, body shape change, voice change, and development of secondary sexual characters.
- Role of hormones
- Endocrine glands secrete hormones into the blood; testosterone (males) and estrogen (females) drive puberty changes.
- Sex determination
- Chromosomes from the father determine the sex of the child (XX → girl, XY → boy).
- Reproductive health
- A balanced diet, hygiene and exercise are important; hormones also control other body functions (e.g. thyroxine, insulin, adrenaline).
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Reaching the Age of Adolescence — FAQs
What are the key concepts in Class 8 Science Reaching the Age of Adolescence?+
This chapter covers adolescence and puberty — the physical and hormonal changes, the role of hormones, and reproductive health. Key ideas include Adolescence & puberty, Changes at puberty, Role of hormones, Sex determination, Reproductive health.
What does Class 8 Science Chapter 107 (Reaching the Age of Adolescence) cover on XamBaaz?+
It has 72 NCERT-based MCQs on "Reaching the Age of Adolescence": 24 Easy, 24 Medium and 24 Hard. Together they make 6 timed quizzes, and you never get the same set twice. Every question has an instant explanation. They help you prepare for CBSE Board exams.
Are these "Reaching the Age of Adolescence" questions free to practise?+
Yes. Sign in with Google to practise "Reaching the Age of Adolescence" free. Full unlimited access is ₹999/year. One year from the day you pay. You stay in Class 8 till 31 March; on 1 April your account moves up to Class 9 and the rest of your year carries over. No chapter is charged separately.
How should I revise "Reaching the Age of Adolescence" for the exam?+
Start with the Easy quiz to check your basics, then try Medium and Hard to practise applying them. There are 6 timed quizzes on this chapter, so you can come back for a fresh set instead of one you have seen. Read each explanation, retry the questions you miss, and track your accuracy until it stays high.
Are these "Reaching the Age of Adolescence" MCQs available with answers?+
Yes. 6 sample questions are on this page with answers: tap an option, or "Show answer", to see the correct option and a step-by-step explanation. Sign in free with Google to start practising, with instant scoring.
Is there negative marking in the "Reaching the Age of Adolescence" quizzes?+
Yes. The timed quizzes use exam-style marking: +4 for a right answer, −1 for a wrong one and 0 for a skip. MHT-CET and CBSE board papers have no negative marking. Our mocks for those are scored their way.
What are the important questions from Reaching the Age of Adolescence (Class 8 Science)?+
The questions that matter most test Adolescence & puberty, Changes at puberty, Role of hormones, Sex determination, Reproductive health. This page shows 6 solved important MCQs with answers and explanations. Sign in to practise all 72 questions on the chapter as timed quizzes.
Is there an online quiz for Reaching the Age of Adolescence?+
Yes — Class 8 Science Reaching the Age of Adolescence has timed online quizzes at Easy, Medium and Hard levels, with instant scoring and a worked explanation on every question. The first quiz on the chapter is free.
Are there question answers and extra questions for Reaching the Age of Adolescence (Class 8 Science)?+
Yes. This page has 6 solved questions on Reaching the Age of Adolescence, each with the correct answer and a short explanation. Sign in to practise all 72 questions on the chapter as timed quizzes.