Important Questions Class 7 Science Chapter 6: Adolescence A Stage of Growth and Change

Adolescence is the stage of growth and change between childhood and adulthood.
It usually occurs between 10 and 19 years, when the body prepares for adulthood.

Adolescence brings rapid physical, emotional, behavioural and biological changes that prepare the body for adulthood. Important Questions Class 7 Science Chapter 6 help students practise puberty, secondary sexual characteristics, menstrual cycle, emotional changes, nutrition, personal hygiene, physical activity, social media safety, substance abuse and hormones. The CBSE 2026 chapter explains these changes through age-related growth, teenage experiences, healthy habits and responsible choices during adolescence.

Key Takeaways

• Adolescence: This stage generally begins around 10 years and continues up to 19 years.
• Puberty: The body develops external and internal changes needed for reproductive maturity.
• Menstruation: The menstrual cycle generally recurs every 28–30 days in many healthy girls.
• Hormones: These body chemicals control many changes during adolescence.

Important Questions Class 7 Science Chapter 6 Structure 2026

Important Questions Class 7 Science Chapter 6 with Answers

Adolescence: A Stage of Growth and Change explains physical, emotional and behavioural changes during teenage years.
Students should connect every answer with growth, puberty, reproductive maturity, hygiene, nutrition or responsible behaviour.
These adolescence class 7 questions follow the NCERT 2026 chapter flow.

1. What does Important Questions Class 7 Science Chapter 6 mainly teach?

Important Questions Class 7 Science Chapter 6 mainly teach adolescence, puberty, menstrual cycle, emotional changes, healthy habits and hormones. The chapter explains how adolescents can handle growth responsibly.

1. Growth Skill: Identify physical changes.
2. Puberty Skill: Understand reproductive maturity.
3. Health Skill: Follow nutrition and hygiene habits.
4. Safety Skill: Avoid harmful substances.
5. Final Result: Chapter 6 teaches growth and responsibility during adolescence.

2. What is the name of Class 7 Science Chapter 6?

The name of Class 7 Science Chapter 6 is Adolescence: A Stage of Growth and Change. It explains teenage growth and development.

1. Chapter Number: 6.
2. Chapter Name: Adolescence: A Stage of Growth and Change.
3. Textbook: Curiosity.
4. Final Result: Chapter 6 is about adolescence and puberty.

3. Why does the chapter compare human growth with plant growth?

The chapter compares human growth with plant growth because both need maturity before reproduction. A seedling cannot produce seeds immediately after germination.

1. Plant Example: Seed becomes sapling and then mature plant.
2. Animal Example: Young ones grow before reproduction.
3. Human Example: Body matures during adolescence.
4. Final Result: Living beings reproduce only after reaching maturity.

Class 7 Science Chapter 6 Important Questions

Class 7 Science Chapter 6 important questions focus on teenage growth and body changes.
The chapter explains that every person experiences adolescence at their own pace.
Students should avoid comparing changes in different individuals.

4. What is adolescence?

Adolescence is the stage of development between childhood and adulthood. It usually occurs between 10 and 19 years.

1. Starting Age: Around 10 years.
2. Ending Age: Around 19 years.
3. Main Change: Body prepares for adulthood.
4. Final Result: Adolescence is the teenage growth stage.

5. Why is adolescence called a stage of growth and change?

Adolescence is called a stage of growth and change because the body grows rapidly and develops new features. Emotional and behavioural changes also occur.

1. Physical Change: Increase in height and weight.
2. Biological Change: Reproductive organs mature.
3. Emotional Change: Stronger emotions may appear.
4. Final Result: Adolescence includes physical, biological and emotional changes.

6. What are the stages in the journey of human life?

The journey of human life includes infancy, childhood, adolescence, adulthood and old age. Each stage has different growth features.

1. Infancy: Early baby stage.
2. Childhood: Growing child stage.
3. Adolescence: Teenage stage.
4. Adulthood: Mature stage.
5. Old Age: Later stage of life.
6. Final Result: Human life passes through different stages.

7. What changes occur until around 10–12 years of age?

Until around 10–12 years, most changes are related to height and weight. After this, other noticeable changes begin.

1. Early Growth: Height increases.
2. Body Mass: Weight increases.
3. Later Change: Puberty-related signs begin.
4. Final Result: More puberty changes begin after 10–12 years.

8. Why can humans not reproduce immediately after birth?

Humans cannot reproduce immediately after birth because their bodies are not mature. The body needs to grow and develop first.

1. Birth Stage: Reproductive system is immature.
2. Growth Stage: Body develops over time.
3. Adolescence: Body prepares for reproductive capability.
4. Final Result: Reproduction becomes possible only after maturity.

Teenage Years Class 7 Science Questions

Teenage years class 7 science questions cover changes that students may notice from Grades 5 to 8.
These changes may include height, strength, body structure, voice and appearance.
The timing and extent of these changes differ for every adolescent.

9. What are common physical changes during teenage years?

Common physical changes include increase in height, weight, strength, body hair and voice changes. Some changes differ in boys and girls.

1. Height: Increases rapidly.
2. Weight: Body mass increases.
3. Voice: May change during puberty.
4. Body Hair: Appears in new regions.
5. Final Result: Teenage years show rapid physical changes.

10. Why does height increase during adolescence?

Height increases during adolescence because the body undergoes rapid growth. This growth becomes more prominent than in earlier childhood.

1. Before Adolescence: Height grows gradually.
2. During Adolescence: Growth becomes faster.
3. Individual Variation: Timing differs among adolescents.
4. Final Result: Adolescence is marked by noticeable height increase.

11. What body structure changes are seen in boys?

Boys may grow taller, gain weight, develop broader shoulders and have a wider chest. Some boys also develop facial hair.

1. Height: Increases.
2. Shoulders: May become broader.
3. Chest: May become wider.
4. Facial Hair: Moustache and beard may appear.
5. Final Result: Boys show several body structure changes during adolescence.

12. What body structure changes are seen in girls?

Girls grow in height and weight and may develop breasts. These changes are natural signs of growth.

1. Height: Increases.
2. Weight: Increases.
3. Breast Development: Occurs during puberty.
4. Final Result: Girls undergo body changes during adolescence.

13. Why do adolescents gain strength?

Adolescents gain strength because their body grows and muscles develop. Good nutrition and physical activity support this growth.

1. Growth: Body size increases.
2. Muscles: Become stronger.
3. Activity: Sports improve stamina.
4. Final Result: Strength increases as the adolescent body develops.

Puberty Class 7 Science Questions

Puberty class 7 science questions explain the stage when the body develops reproductive capability.
It includes both external and internal changes.
Puberty begins at different times in different individuals.

14. What is puberty?

Puberty is the stage when an adolescent’s body undergoes changes to become capable of reproduction. It includes internal and external changes.

1. Stage: Part of adolescence.
2. Main Feature: Reproductive maturity.
3. Changes: Body hair, voice change and internal changes.
4. Final Result: Puberty prepares the body for reproduction.

15. How is puberty related to adolescence?

Puberty occurs during adolescence. It marks the onset of changes that prepare the body for adulthood and reproductive capability.

1. Adolescence: Larger growth period.
2. Puberty: Biological maturity stage.
3. Relation: Puberty is part of adolescence.
4. Final Result: Puberty is a key event during adolescence.

16. What changes mark the onset of puberty?

Secondary sexual characteristics and reproductive system maturity mark the onset of puberty. Voice change, body hair and breast development are examples.

1. Boys: Voice change and facial hair.
2. Girls: Breast development.
3. Both: Hair in armpits and pubic region.
4. Final Result: Puberty begins with visible and internal body changes.

17. Does puberty occur at the same age for everyone?

No, puberty does not occur at the same age for everyone. Each person experiences adolescence at their own pace.

1. Timing: Varies among individuals.
2. Nature: Changes may differ.
3. Extent: Growth patterns are not identical.
4. Final Result: Variation in puberty timing is normal.

18. Why should adolescents not compare their puberty changes with others?

Adolescents should not compare changes because timing and extent vary naturally. Different growth patterns are completely normal.

1. Height Change: May happen earlier or later.
2. Voice Change: May differ in timing.
3. Hair Growth: May vary among individuals.
4. Final Result: Individual variation during adolescence is normal.

Secondary Sexual Characteristics Class 7 Questions

Secondary sexual characteristics class 7 questions cover features that distinguish males and females.
These features are not directly involved in reproduction.
They are natural signs that the body is preparing for adulthood.

19. What are secondary sexual characteristics?

Secondary sexual characteristics are features that distinguish males from females but are not directly involved in reproduction. They appear during puberty.

1. Boys: Facial hair and voice change.
2. Girls: Breast development.
3. Both: Hair growth in armpits and pubic region.
4. Final Result: Secondary sexual characteristics mark puberty.

20. Give examples of secondary sexual characteristics in boys.

Examples in boys include change in voice, facial hair, chest hair and broader shoulders. These changes may vary among individuals.

1. Voice: Becomes deeper or hoarse.
2. Facial Hair: Moustache and beard appear.
3. Body Hair: Chest or back hair may appear.
4. Final Result: Boys develop several secondary sexual characteristics.

21. Give examples of secondary sexual characteristics in girls.

Examples in girls include breast development and body shape changes. Hair also grows in armpits and pubic region.

1. Breasts: Develop during puberty.
2. Body Shape: Changes gradually.
3. Hair Growth: Occurs in armpits and pubic region.
4. Final Result: Girls develop secondary sexual characteristics during puberty.

22. Which changes are common in boys and girls during adolescence?

Common changes include increase in height, weight gain, pimples, and hair growth in armpits and pubic region. Emotional changes also occur.

1. Height: Increases.
2. Pimples: May appear.
3. Body Hair: Appears in armpits and pubic region.
4. Final Result: Some adolescent changes are common in boys and girls.

23. Why do boys develop a hoarse voice during adolescence?

Boys may develop a hoarse voice because the voice box grows. The growth can appear as a bump called Adam’s apple.

1. Structure: Voice box.
2. Change: It grows during adolescence.
3. Visible Sign: Adam’s apple may appear.
4. Final Result: Voice change in boys occurs due to voice box growth.

24. What is Adam’s apple?

Adam’s apple is a bump in the throat region caused by growth of the voice box. It is more noticeable in some adolescent boys.

1. Location: Throat region.
2. Cause: Enlarged voice box.
3. Variation: Not visible in every person.
4. Final Result: Adam’s apple is linked with voice box growth.

Menstrual Cycle Class 7 Questions

Menstrual cycle class 7 questions explain an important internal change in adolescent girls.
The cycle generally recurs every 28–30 days in many girls.
Healthy cycles can also range from 21 to 35 days.

25. What is the menstrual cycle?

The menstrual cycle is a natural process in adolescent girls and women. It generally recurs every 28–30 days.

1. Cycle: Repeats regularly.
2. Common Duration: 28–30 days.
3. Healthy Range: 21–35 days may occur.
4. Final Result: Menstrual cycle is a natural reproductive health process.

26. What is menstruation?

Menstruation is the phase of the menstrual cycle when blood discharge occurs from the body. It may last for three to seven days.

1. Process: Blood discharge.
2. Duration: 3–7 days.
3. Common Name: Period.
4. Final Result: Menstruation is the bleeding phase of the menstrual cycle.

27. What is a period?

A period is the common name for menstruation. It is the phase when blood discharge occurs during the menstrual cycle.

1. Scientific Term: Menstruation.
2. Common Term: Period.
3. Duration: Usually 3–7 days.
4. Final Result: Period means menstruation.

28. Is menstruation a sign of good reproductive health?

Yes, menstruation is one sign of good reproductive health. It is a natural process during adolescence and adulthood.

1. Natural Process: Occurs after puberty.
2. Cycle: Recurs in many girls.
3. Health Link: Shows reproductive system function.
4. Final Result: Menstruation is a normal biological process.

29. At what age does menstruation usually stop?

Menstruation usually stops naturally between 45 and 55 years. This marks the end of reproductive capability in a woman’s life.

1. Age Range: 45–55 years.
2. Process: Natural stopping of menstruation.
3. Meaning: Reproductive capability ends.
4. Final Result: Menstruation generally stops by 45–55 years.

30. Why should myths about menstruation be avoided?

Myths about menstruation should be avoided because they have no scientific basis. They may create fear, shame or guilt.

1. Menstruation: Natural process.
2. Myths: Not scientific.
3. Better Approach: Scientific outlook.
4. Final Result: Menstruation myths should be replaced with awareness.

Menstruation Class 7 Science Questions

Menstruation class 7 science questions focus on healthy habits, comfort and dignity.
The chapter explains the importance of menstrual hygiene.
Used sanitary pads should be disposed of properly.

31. Why is menstrual hygiene important?

Menstrual hygiene is important because it protects comfort and health. It also reduces the risk of infections.

1. Cleanliness: Helps prevent infection.
2. Comfort: Supports daily activity.
3. Health: Promotes reproductive hygiene.
4. Final Result: Menstrual hygiene supports health and comfort.

32. What items can help maintain menstrual hygiene?

Sanitary pads and reusable cloth pads designed for menstruation can help maintain menstrual hygiene. These should be used and disposed of properly.

1. Sanitary Pads: Common hygiene product.
2. Reusable Cloth Pads: Designed for menstrual use.
3. Choice: Must support cleanliness.
4. Final Result: Menstrual hygiene products help manage periods safely.

33. How should used sanitary pads be disposed of?

Used sanitary pads should be wrapped in newspaper and put inside a dustbin. This helps community health and environmental cleanliness.

1. Step 1: Wrap the used pad.
2. Step 2: Put it in a dustbin.
3. Purpose: Maintain cleanliness.
4. Final Result: Used pads should be wrapped and disposed in dustbins.

34. What are biodegradable sanitary pads?

Biodegradable sanitary pads are environment-friendly pads that can break down naturally. They reduce waste concerns.

1. Type: Sanitary product.
2. Property: Biodegradable.
3. Benefit: Environment-friendly.
4. Final Result: Biodegradable pads are better for the environment.

35. Name government initiatives linked with menstrual hygiene.

Menstrual Hygiene Scheme, Rashtriya Kishor Swasthya Karyakram and Suvidha Sanitary Napkin Initiative support menstrual health. Some states also run free sanitary napkin schemes.

1. MHS: Supports adolescent girls in rural areas.
2. RKSK: Supports adolescent health.
3. Suvidha Initiative: Provides affordable biodegradable pads.
4. Final Result: Government schemes support menstrual hygiene access.

Emotional Changes in Adolescence Class 7

Emotional changes in adolescence class 7 questions explain mood, sensitivity and behaviour.
Adolescence can bring stronger emotions than childhood.
Understanding emotions helps adolescents make thoughtful choices.

36. What emotional changes occur during adolescence?

Adolescents may experience mood swings, strong emotions and increased sensitivity. These changes can affect behaviour.

1. Mood Swings: Feelings may change quickly.
2. Strong Emotions: Reactions may feel intense.
3. Sensitivity: Adolescents may feel deeply.
4. Final Result: Adolescence can bring emotional changes.

37. Why do mood swings happen during adolescence?

Mood swings may happen because adolescence brings emotional and hormonal changes. These changes can influence behaviour and feelings.

1. Body Changes: Occur rapidly.
2. Hormones: Influence mood.
3. Emotions: Become stronger.
4. Final Result: Mood swings can occur during adolescent development.

38. How can adolescents handle strong emotions positively?

Adolescents can handle strong emotions through music, dance, sports, creative activities and social work. Support from elders also helps.

1. Physical Activity: Sports.
2. Creative Activity: Music or dance.
3. Social Action: Helping others.
4. Final Result: Positive activities help manage emotions.

39. Why is understanding emotions important?

Understanding emotions is important because emotions influence behaviour and actions. This helps adolescents respond thoughtfully.

1. Emotion: Affects decisions.
2. Behaviour: Can change with feelings.
3. Awareness: Helps better choices.
4. Final Result: Emotional awareness supports thoughtful behaviour.

40. What behavioural changes may occur during adolescence?

Adolescents may develop new interests, strong opinions, social awareness and deeper creativity. They may also join social initiatives.

1. New Interests: Sports, arts or study areas.
2. Social Concern: Helping disadvantaged people.
3. Creativity: New ideas and innovation.
4. Final Result: Behaviour can change in constructive ways during adolescence.

Nutrition During Adolescence Class 7 Questions

Nutrition during adolescence class 7 questions explain why food matters during teenage growth.
Adolescents need a balanced diet because the body grows rapidly.
Proteins, carbohydrates, fats, vitamins and minerals support growth and energy.

41. Why is nutrition important during adolescence?

Nutrition is important because adolescence is a period of rapid growth and development. A balanced diet supports strength, energy and body changes.

1. Protein: Supports growth.
2. Carbohydrates: Provide energy.
3. Vitamins and Minerals: Support body functions.
4. Final Result: Adolescents need nutritious food for healthy growth.

42. Which nutrients help optimal bone growth?

Calcium helps optimal bone growth. Milk, curd, cheese and paneer are useful sources.

1. Nutrient: Calcium.
2. Sources: Milk, curd, cheese and paneer.
3. Function: Helps bone growth.
4. Final Result: Calcium supports strong bones.

43. Why do adolescents need proteins?

Adolescents need proteins for proper growth, strength and body repair. Protein-rich food supports development during teenage years.

1. Function: Growth.
2. Function: Strength.
3. Sources: Pulses, milk, curd and paneer.
4. Final Result: Proteins support growth and strength.

44. Why is iron important during adolescence?

Iron is important because it helps in the formation of blood. Iron deficiency can cause blood-related health problems.

1. Nutrient: Iron.
2. Function: Helps blood formation.
3. Sources: Spinach, kidney beans, raisins and figs.
4. Final Result: Iron supports healthy blood formation.

45. What foods provide iron?

Spinach, kidney beans and dried fruits like raisins and figs provide iron. These foods help support blood formation.

1. Leafy Vegetable: Spinach.
2. Pulse: Kidney beans.
3. Dried Fruits: Raisins and figs.
4. Final Result: Iron-rich foods support adolescent health.

46. Why is vitamin B12 important?

Vitamin B12 is required for proper functioning of the human body. It must be obtained from food because the body cannot make most vitamins.

1. Nutrient: Vitamin B12.
2. Need: Proper body functioning.
3. Source: Food.
4. Final Result: Vitamin B12 supports body function.

Personal Hygiene During Adolescence Class 7

Personal hygiene during adolescence class 7 questions cover body cleanliness and infection prevention.
Hygiene becomes important because the body changes during puberty.
Clean habits protect health and confidence.

47. Why is personal hygiene important during adolescence?

Personal hygiene is important because body changes can increase sweat and infections. Cleanliness protects health.

1. Body Regions: Armpits and pubic region.
2. Risk: Potential infections.
3. Habit: Regular cleaning.
4. Final Result: Personal hygiene helps prevent infections.

48. Which body areas need special hygiene during adolescence?

The armpits and pubic region need special hygiene during adolescence. Keeping these areas clean helps reduce infection risk.

1. Armpits: Need regular cleaning.
2. Pubic Region: Needs hygiene.
3. Reason: Protects from infection.
4. Final Result: Body hygiene is important during puberty.

49. How does physical activity help adolescents?

Physical activity keeps the body and mind fit. It builds stamina and improves mood.

1. Exercise: Supports fitness.
2. Sports: Build stamina.
3. Mood: Can improve through activity.
4. Final Result: Physical activity supports body and mind.

50. Why should adolescents maintain a balanced social life?

Adolescents should maintain a balanced social life because respectful interaction creates a safe environment. Good behaviour supports healthy relationships.

1. Respect: Be polite.
2. Safety: Avoid harmful interactions.
3. Support: Seek guidance from elders.
4. Final Result: Balanced social behaviour supports well-being.

Harmful Substances Class 7 Questions

Harmful substances class 7 questions explain why adolescents should avoid addictive substances.
Tobacco, gutka, cigarettes, beedi, alcohol and illegal drugs can damage health.
The chapter clearly says to say NO the first time and every time.

51. What are harmful substances in adolescence?

Harmful substances include tobacco, gutka, cigarettes, beedi, alcohol and life-threatening illegal drugs. These harm physical and mental health.

1. Tobacco Products: Gutka, cigarettes and beedi.
2. Alcohol: Addictive substance.
3. Illegal Drugs: Dangerous and life-threatening.
4. Final Result: Harmful substances must be completely avoided.

52. What is substance abuse?

Substance abuse is regular harmful use of addictive substances. It may begin when someone tries a substance once.

1. Addiction: Strong urge to use again.
2. Regular Use: Develops over time.
3. Risk: Health and future are affected.
4. Final Result: Substance abuse is harmful repeated use of addictive substances.

53. Why are addictive substances dangerous?

Addictive substances are dangerous because they create a strong urge to use them again and again. They also harm the body and mind.

1. Health Damage: Breathing difficulty may occur.
2. Memory: Memory loss may occur.
3. Lungs: Smoke can damage lungs.
4. Final Result: Addictive substances damage health.

54. Why should adolescents say NO to harmful substances?

Adolescents should say NO because even one try can lead to repeated use. Avoiding them protects health and future.

1. Peer Pressure: May tempt adolescents.
2. First Use: Can become habit.
3. Best Choice: Refuse clearly.
4. Final Result: Say NO to harmful substances every time.

55. What should a person do to overcome addiction?

A person should seek help from family, friends, parents, teachers, counsellors or doctors. Medical advice can support recovery.

1. Family Support: Helps emotionally.
2. Teacher Support: Gives guidance.
3. Medical Help: Supports treatment.
4. Final Result: Addiction needs support and proper help.

56. What is Nasha Mukt Bharat Abhiyaan?

Nasha Mukt Bharat Abhiyaan is a Government of India campaign to spread awareness against substance abuse. It focuses on youth, women and communities.

1. Ministry: Social Justice and Empowerment.
2. Aim: Prevent substance abuse.
3. Helpline: 14446.
4. Final Result: Nasha Mukt Bharat Abhiyaan supports addiction awareness.

Hormones Class 7 Science Questions

Hormones class 7 science questions explain why adolescence changes occur.
Hormones are chemicals produced in the body.
They are released at the right time through signals from the brain.

57. What are hormones?

Hormones are chemicals produced in the body. They regulate growth, development, mood and body functions.

1. Nature: Body chemicals.
2. Control: Growth and development.
3. Release: Triggered by brain signals.
4. Final Result: Hormones control many adolescent changes.

58. Why do changes occur during adolescence?

Changes occur during adolescence mainly because of hormones. These chemicals influence growth, puberty, menstruation, mood and behaviour.

1. Physical Change: Growth and body structure.
2. Biological Change: Reproductive maturity.
3. Emotional Change: Mood and behaviour.
4. Final Result: Hormones drive many puberty changes.

59. How do hormones influence behaviour?

Some hormones influence mood and behaviour. This can contribute to emotional changes during adolescence.

1. Mood: May change strongly.
2. Behaviour: May be affected.
3. Awareness: Helps better choices.
4. Final Result: Hormones can affect emotions and behaviour.

60. Why should adolescents stay informed about body changes?

Adolescents should stay informed because awareness reduces fear and confusion. It helps them manage changes responsibly.

1. Information: Builds confidence.
2. Guidance: Parents and teachers can help.
3. Health Choices: Support well-being.
4. Final Result: Awareness helps adolescents handle change.

NCERT Class 7 Science Chapter 6 Questions

NCERT Class 7 Science Chapter 6 questions test puberty, menstrual hygiene, food choices and social behaviour.
Students should answer sensitively and scientifically.
These NCERT Class 7 Science Chapter 6 questions follow the 2026 exercise pattern.

61. Why did Ramesh develop pimples on his face?

Ramesh developed pimples because oily secretions increase during adolescence. These secretions may clog skin pores and cause infections.

1. Age: 11 years.
2. Cause: Increased oily secretion.
3. Effect: Pores get clogged.
4. Final Result: Pimples can occur during adolescence due to acne.

62. What can Ramesh do to get relief from pimples?

Ramesh can keep his face clean and avoid scratching pimples. He should seek medical advice if acne becomes severe.

1. Cleanliness: Wash face gently.
2. Avoid: Do not squeeze pimples.
3. Help: Consult a doctor if needed.
4. Final Result: Clean skin care helps manage pimples.

63. Which food group is better for adolescents?

A balanced food group with proteins, carbohydrates, fats, vitamins and minerals is better. Adolescents need nutrients for growth and energy.

1. Proteins: Growth and strength.
2. Carbohydrates: Energy.
3. Minerals: Bone and blood health.
4. Final Result: Balanced food supports adolescent development.

64. Unscramble nstmnoiaretu.

The word is menstruation. It refers to blood discharge during the menstrual cycle.

1. Scrambled Word: nstmnoiaretu.
2. Correct Word: Menstruation.
3. Meaning: Blood discharge phase.
4. Final Result: nstmnoiaretu means menstruation.

65. Unscramble iceov xob.

The words are voice box. Its growth causes hoarseness in the voice of adolescent boys.

1. Scrambled Words: iceov xob.
2. Correct Words: Voice box.
3. Function: Helps us speak.
4. Final Result: iceov xob means voice box.

66. Unscramble urtypeb.

The word is puberty. It is the stage when the body becomes capable of reproduction.

1. Scrambled Word: urtypeb.
2. Correct Word: Puberty.
3. Meaning: Reproductive maturity stage.
4. Final Result: urtypeb means puberty.

67. Unscramble lahoclo and srugd.

The words are alcohol and drugs. These substances are addictive and harmful.

1. lahoclo: Alcohol.
2. srugd: Drugs.
3. Advice: Say NO to addictive substances.
4. Final Result: Alcohol and drugs should be avoided.

68. Is Shalu correct that adolescence brings only physical changes?

No, Shalu is not correct. Adolescence brings physical, biological, emotional and behavioural changes.

1. Physical Change: Height and body hair.
2. Biological Change: Reproductive maturity.
3. Emotional Change: Mood swings and sensitivity.
4. Final Result: Adolescence is not limited to physical changes.

69. What question would you ask someone who says adolescents need not worry about behavioural changes?

A suitable question is: How can strong emotions affect choices and actions during adolescence? This checks the role of behaviour.

1. Claim: Behavioural changes do not matter.
2. Check: Ask about emotional influence.
3. Reason: Behaviour affects decisions.
4. Final Result: Behavioural changes need awareness.

70. What question would you ask someone who says trying a harmful substance once is safe?

A suitable question is: Can one-time use of an addictive substance lead to repeated use? This checks the risk of addiction.

1. Claim: One try is safe.
2. Check: Ask about addiction.
3. Fact: Addictive substances create strong urges.
4. Final Result: Even one try can be risky.

71. What hygiene habits should be suggested for menstruation?

Menstrual hygiene habits include using clean pads, changing them regularly and disposing used pads properly. Clean toilets also help.

1. Use: Sanitary pads or clean reusable cloth pads.
2. Change: Maintain cleanliness.
3. Dispose: Wrap and put in dustbin.
4. Final Result: Menstrual hygiene protects health and cleanliness.

72. Why were Mary and Manoj advised differently for neck bulges?

Mary’s neck bulge needed medical attention because it could be a health issue linked to iodine deficiency. Manoj’s bump was likely Adam’s apple.

1. Mary: Doctor gave medicine and iodine-rich diet.
2. Manoj: Doctor said it was normal growth.
3. Reason: Boys may develop Adam’s apple.
4. Final Result: Different causes need different advice.

Class 7 Science Chapter 6 Questions and Answers

Class 7 Science Chapter 6 questions and answers should use age-appropriate scientific explanations.
Students should avoid myths and use respectful language.
These answers support quick revision for school tests.

73. Categorise change in voice during adolescence.

Change in voice is commonly observed in boys, but girls may also have slight voice changes. It is more noticeable in boys.

1. Boys: Voice box grows more.
2. Girls: Voice box also grows slightly.
3. Visible Sign: Adam’s apple may appear in boys.
4. Final Result: Voice change is more noticeable in boys.

74. Categorise development of breasts during adolescence.

Development of breasts is observed only in girls. It is one of the secondary sexual characteristics.

1. Observed In: Girls.
2. Stage: Puberty.
3. Category: Secondary sexual characteristic.
4. Final Result: Breast development is observed in girls.

75. Categorise growth of moustache and facial hair.

Growth of moustache and facial hair is observed in boys. It becomes more visible as boys move towards adulthood.

1. Observed In: Boys.
2. Feature: Facial hair.
3. Examples: Moustache and beard.
4. Final Result: Moustache and beard growth are observed in boys.

76. Categorise pimples on the face during adolescence.

Pimples on the face are common in boys and girls. They occur due to increased oily secretions from the skin.

1. Observed In: Boys and girls.
2. Cause: Oily secretions.
3. Condition: Acne.
4. Final Result: Pimples can occur in both boys and girls.

77. Categorise hair growth in armpits and pubic region.

Hair growth in armpits and pubic region is common in boys and girls. It is a normal puberty change.

1. Armpit Hair: Common in both.
2. Pubic Hair: Common in both.
3. Stage: Adolescence.
4. Final Result: This hair growth is common in boys and girls.

78. What tips should a healthy lifestyle poster for adolescents include?

The poster should include balanced diet, hygiene, exercise, respectful behaviour, safe social media use and refusal of harmful substances. These habits support well-being.

1. Food: Eat nutritious meals.
2. Hygiene: Keep body clean.
3. Activity: Play and exercise.
4. Safety: Say NO to harmful substances.
5. Final Result: Healthy lifestyle needs daily responsible choices.

Class 7 Science Important Links