Adolescence: A Stage of Growth and ChangeClass 7 Science NCERT Solutions
10 Solutions
Generated by KedovoAI
Solution 1 of 10
Q1Let Us Enhance Our Learning
Ramesh, an 11-year-old boy, developed a few pimples on his face. His mother told him that this is because of ongoing biological changes in his body.
(i)
What could be the possible reasons for the development of these pimples on his face?
(ii)
What can he do to get some relief from these pimples?
Solution
(i)
The possible reason for the development of pimples on Ramesh's face is the increased oily secretions from the skin during adolescence. These secretions can clog the skin pores and lead to infections, resulting in acne and pimples.
(ii)
To get some relief from these pimples, Ramesh can:
- Wash his face regularly with a mild cleanser.
- Avoid touching his face.
- Use over-the-counter acne treatments.
- Maintain a healthy diet.
- Consult a dermatologist if the problem persists.
Q2Let Us Enhance Our Learning
Which of the following food groups would be a better option for adolescents and why?
Solution
Option (ii) would be a better option for adolescents. This is because adolescents need a balanced diet that includes proteins, carbohydrates, fats, vitamins, and minerals for proper growth and development. Option (ii) appears to offer a more balanced and nutritious selection, including items like eggs, vegetables, fruits and dairy products, which provide essential nutrients. Option (i) seems to be mainly junk food which is not nutritious.
Q3Let Us Enhance Our Learning
Unscramble the underlined word in the following sentences:
(i)
The discharge of blood in adolescent girls which generally occurs every days is nstmnoiaretu.
(ii)
The hoarseness in the voice of adolescent boys is due to enlarged iceov xob.
(iii)
Secondary sexual characteristics are natural signs that the body is preparing for adulthood and mark the onset of urtypeb.
(iv)
We should say NO to lahoclo and srugd as they are addictive.
Solution
(i)
menstruation
(ii)
voice box
(iii)
puberty
(iv)
alcohol and drugs
Q4Let Us Enhance Our Learning
Shalu told her friend, "Adolescence brings only physical changes, like growing taller or developing body hair." Is she correct? What would you change in this description of adolescence?
Solution
Shalu is not correct. Adolescence brings not only physical changes but also emotional and behavioral changes. In addition to growing taller and developing body hair, adolescents experience changes in their emotions, thinking patterns, and social interactions. They also develop the ability to reproduce. Therefore, the description should include physical, emotional, behavioral, and reproductive changes.
Q5Let Us Enhance Our Learning
During a discussion in the class, some of the students raised the following points. What questions would you ask them to check the correctness of these points?
(i)
Adolescents do not need to worry about behavioural changes.
(ii)
If someone tries a harmful substance once, they can stop anytime they want.
Solution
(i)
To check the correctness of the point that adolescents do not need to worry about behavioral changes, I would ask:
- How do behavioral changes impact decision-making during adolescence?
- Can you provide examples of how emotional changes influence behavior during this stage?
- What are the potential consequences of ignoring behavioral changes during adolescence?
(ii)
To check the correctness of the point that if someone tries a harmful substance once, they can stop anytime they want, I would ask:
- How does addiction develop, and what are the chances of becoming addicted after trying a substance even once?
- What are the physical and psychological effects of addictive substances?
- What support systems are available for people struggling with addiction?
Q6Let Us Enhance Our Learning
Adolescents sometimes experience mood swings. On some days, they feel very energetic and happy, while on other days, they may feel low. What other behavioural changes are associated with this age?
Solution
Besides mood swings, other behavioral changes associated with adolescence include:
- Increased curiosity and a desire to explore new things.
- A stronger need for independence and autonomy.
- A heightened interest in social interactions and peer relationships.
- A tendency to question authority and challenge norms.
- Increased self-consciousness and concern about body image.
- Development of deeper interests in new areas, such as social initiatives.
Q7Let Us Enhance Our Learning
While using a toilet, Mohini noticed that used sanitary pads were scattered near the bin. She got upset and shared her feelings with her friends. They discussed the importance of menstrual hygiene and healthy sanitary habits. What menstrual hygiene and sanitary habits would you suggest to your friends?
Solution
I would suggest the following menstrual hygiene and sanitary habits to my friends:
- Change sanitary pads regularly, every 4-6 hours, to prevent infections.
- Wash hands thoroughly with soap and water before and after changing pads.
- Dispose of used sanitary pads properly by wrapping them in newspaper and placing them in a dustbin.
- Use appropriate menstrual hygiene products, such as sanitary pads or reusable cloth pads.
- Maintain cleanliness in the genital area by washing it with water daily.
- Be aware of the menstrual cycle and keep track of the dates.
- If using reusable cloth pads, wash them properly with soap and dry them in the sun before reuse.
- Support government initiatives regarding menstrual hygiene.
Q8Let Us Enhance Our Learning
Mary and Manoj were classmates and good friends. On turning 11, Mary developed a little bulge on the front of her neck. She visited the doctor who gave her medication and asked to take iodine-rich diet. Similarly, a bump was developed on the front of Manoj's neck when he turned 12. However, the doctor told him that it was a part of growing up. According to you, what could be the possible reason for advising Mary and Manoj differently?
Solution
The possible reason for advising Mary and Manoj differently could be due to different underlying conditions.
-
Mary's bulge on the front of her neck, along with the doctor's advice to take iodine-rich diet and medication, suggests that she might have developed goiter due to iodine deficiency. Iodine is essential for the proper functioning of the thyroid gland, and its deficiency can lead to thyroid enlargement.
-
Manoj's bump on the front of his neck, which the doctor said was a part of growing up, is likely the Adam's apple. The Adam's apple is the growth of the voice box during adolescence, which is more prominent in boys. It is a normal part of puberty and does not require any specific treatment.
Q9Let Us Enhance Our Learning
During adolescence, the boys and girls undergo certain physical changes, a few of which are given below.
(i)
Change in voice
(ii)
Development of breasts
(iii)
Growth of moustache
(iv)
Growth of facial hair
(v)
Pimples on the face
(vi)
Growth of hair in the pubic region
(vii)
Growth of hair in armpits Categorise these changes in the table given below:
Solution
Changes common to both boys and girls:
(v)
Pimples on the face
*
(vi)
Growth of hair in the pubic region
*
(vii)
Growth of hair in armpits
Changes specific to boys:
(i)
Change in voice
*
(iii)
Growth of moustache
*
(iv)
Growth of facial hair
Changes specific to girls:
(ii)
Development of breasts
Q10Let Us Enhance Our Learning
Prepare a poster mentioning the tips for adolescents to live a healthy lifestyle.
Solution
A poster mentioning the tips for adolescents to live a healthy lifestyle should include the following points:
- Eat a balanced and nutritious diet.
- Engage in regular physical activity.
- Maintain good personal hygiene.
- Get enough sleep and rest.
- Manage stress and emotions effectively.
- Avoid harmful substances like tobacco, alcohol, and drugs.
- Practice safe social media habits.
- Seek support from family and friends.
- Stay informed about adolescent health issues.
- Consult a healthcare professional when needed.