NCERT Solutions For Class 8 Science Chapter 7 Conservation Of Plants And Animals in Hindi - 2025-26
FAQs on NCERT Solutions For Class 8 Science Chapter 7 Conservation Of Plants And Animals in Hindi - 2025-26
1. What is adolescence and why is it significant for Class 8 students to study?
Adolescence is the period of transition from childhood to adulthood, typically occurring between ages 10-19 years, characterized by rapid physical, mental, and emotional changes. This topic is crucial for Class 8 students as they are experiencing or about to experience these changes themselves, making it personally relevant and scientifically important.
Why it matters: Understanding adolescence helps students recognize normal developmental patterns and cope with bodily changes confidently.
Example: Height increase of 5-8 cm per year during growth spurts, voice changes in boys, and onset of menstruation in girls are common adolescent changes.
Tip: Students should maintain a healthy diet rich in proteins and calcium during this growth phase for optimal development.
2. How do NCERT Solutions Class 8 Science Chapter 7 help students understand puberty changes?
NCERT Solutions for reaching the age of adolescence provide detailed explanations of puberty changes through step-by-step answers, diagrams, and scientific reasoning that align with CBSE curriculum requirements. These solutions break down complex hormonal processes into simple, age-appropriate language that Class 8 students can easily comprehend.
Why it matters: Proper understanding prevents misconceptions about normal body changes and reduces anxiety among adolescents.
Check: Solutions include both in-text and exercise questions covering topics like growth spurts, secondary sexual characteristics, and emotional changes.
Tip: Regular practice with these solutions helps students answer exam questions confidently while gaining scientific knowledge about their own development.
3. What are the primary and secondary sexual characteristics explained in this chapter?
Primary sexual characteristics are reproductive organs present from birth (testes in boys, ovaries in girls), while secondary sexual characteristics develop during puberty and distinguish males from females without being directly involved in reproduction. These changes occur due to hormonal secretions during adolescence.
Why it matters: Understanding these differences helps students recognize normal development patterns and appreciate biological diversity.
Example: Secondary characteristics include facial hair and deeper voice in boys, breast development in girls, and body hair growth in both sexes.
Formula: Primary = present from birth; Secondary = develops during puberty due to hormonal changes.
4. Where can students access reaching the age of adolescence NCERT PDF for free study?
Students can access the Free PDF of NCERT Chapter 7 through official NCERT website, educational platforms like Vedantu, and government educational portals that provide legitimate downloads without cost. These PDFs contain complete chapter content, diagrams, and exercise questions in the same format as printed textbooks.
Why it matters: Free access ensures all students can study regardless of economic background, supporting inclusive education.
Check: Verify the PDF is from authentic sources to ensure accuracy and latest curriculum alignment.
Tip: Download PDFs to device storage for offline study, especially useful in areas with limited internet connectivity during exam preparation.
5. How do hormones control the changes during adolescence?
Hormones act as chemical messengers that trigger and control adolescent changes, with testosterone in boys and estrogen in girls being the primary sex hormones responsible for physical and emotional development. These hormones are produced by endocrine glands and released into the bloodstream to reach target organs.
Why it matters: Hormonal understanding explains why changes occur at different rates in different individuals, promoting self-acceptance.
Example: Growth hormone increases height by 6-10 cm annually during peak adolescence, while sex hormones develop secondary sexual characteristics.
Tip: Regular exercise and balanced nutrition support healthy hormone production and proper development during this critical growth phase.
6. What questions and answers are commonly asked from reaching the age of adolescence Class 8?
Common questions include definitions of adolescence and puberty, differences between boys and girls during puberty, role of hormones, reproductive health, and emotional changes during teenage years. These questions test both theoretical understanding and practical application of concepts related to human development.
Why it matters: Exam preparation requires comprehensive coverage of all chapter aspects, from basic definitions to complex hormonal mechanisms.
Check: Practice questions cover NCERT in-text questions, exercise problems, and additional conceptual queries for thorough preparation.
Tip: Focus on diagram-based questions about reproductive systems and hormonal pathways, as these frequently appear in Class 8 Science examinations and carry significant marks.
7. How should students approach reproductive health topics covered in this chapter?
Students should approach reproductive health topics with scientific curiosity and maturity, understanding these concepts as normal biological processes essential for human development and species continuation. The chapter presents information factually and age-appropriately, focusing on health and hygiene aspects.
Why it matters: Proper education prevents myths and misconceptions while promoting healthy attitudes toward natural body functions.
Example: Understanding menstrual cycle helps girls prepare for normal monthly changes and maintain proper hygiene practices.
Tip: Discuss doubts with teachers, parents, or school counselors rather than relying on unverified internet sources for reproductive health information.
Summary: Scientific approach to reproductive health builds confidence and dispels harmful myths about natural body processes.
8. What role does proper nutrition play during adolescence according to NCERT guidelines?
Proper nutrition during adolescence provides essential building blocks for rapid growth, with increased requirements for proteins, calcium, iron, and vitamins to support height increase, muscle development, and hormonal changes. NCERT emphasizes balanced diet importance for optimal physical and mental development during this critical growth phase.
Why it matters: Nutritional deficiencies during adolescence can permanently affect height, bone density, and cognitive development.
Example: Growing teenagers need 50-60 grams of protein daily, compared to 30-35 grams for younger children.
Tip: Include milk, eggs, pulses, green vegetables, and fruits daily while avoiding excessive junk food that provides empty calories without essential nutrients.
