Question Answer Chapter 6 Class 7 Science Curiosity NCERT

Adolescence: A Stage of Growth and Change

1. 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?

Answer:

• Pimples are caused by acne, a skin condition during adolescence.
• Increased oily secretions from the skin clog pores, leading to infections.
• Hormonal changes during puberty cause more oil production.

(ii) What can he do to get some relief from these pimples?

Answer:

• Wash the face regularly with mild soap to keep it clean.
• Avoid touching or squeezing pimples to prevent worsening.
• Consult a doctor for proper treatment if pimples persist.

2. Which of the following food groups would be a better option for adolescents and why?

Answer: Food group (ii) would be a better option for adolescents as it is composed of vegetables, grains, daily products, etc. Such foods are rich in essential nutrients like proteins, carbohydrates, vitamins, and minerals, which are important for growth, development, and overall health during adolescence.

3. Unscramble the underlined word in the following sentences:

(i) The discharge of blood in adolescent girls which generally occurs every 28-30 days is nstmnoiaretu.

Answer: menstruation.

(ii) The hoarseness in the voice of adolescent boys is due to enlarged iceov xob.

Answer: voice box.

(iii) Secondary sexual characteristics are natural signs that the body is preparing for adulthood and mark the onset of urtypeb.

Answer: puberty.

(iv) We should say NO to lahoclo and srugd as they are addictive.

Answer: alcohol and drugs.

4. 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?

Answer: Shalu is not completely correct. Adolescence is not only about physical changes like growing taller or developing body hair. It also includes the development of reproductive capability, as well as emotional and behavioral changes.

5. 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.

Answer: The following questions can be asked for the correctness of the point (i):

(a) What makes you think that “behavioural changes’ during adolescence are something to worry about?
(b) Why do you think it is important for adolescents to adapt to changes in a positive way rather than worrying about them?

(ii) If someone tries a harmful substance once, they can stop anytime they want.

Answer: The following questions can be asked for the correctness of the point (ii):

(a) What makes you think that someone can stop using a harmful substance whenever they want?
(b) Are you aware of the concept of addiction? How might using a substance even once affect someone’s ability to stop?
(c) Have you heard of any studies or research that suggest it’s easy to stop using harmful substances after trying them once?

6. 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?

Answer:

• Adolescents may show increased sensitivity to others’ actions.
• They may develop a deeper interest in new activities or hobbies.
• Some may join social initiatives to help the needy.
• They might feel curious and excited about exploring new things.

7. 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?

Answer: The menstrual hygiene and sanitary habits one should follow are:

• Use sanitary pads or reusable cloth pads during menstruation.
• Change pads every 4-6 hours to stay clean and avoid infections.
• Wrap used pads in newspaper and dispose of them in a dustbin.
• Wash hands before and after changing pads to maintain hygiene.
• Keep the pubic area clean by bathing daily during periods.

8. 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?

Answer: The possible reason for the doctor advising Mary and Manoj differently is that Mary’s bulge on the neck might be related to a condition called goitre that is caused by a deficiency of iodine. Iodine is essential for the proper functioning of the thyroid gland, and its deficiency can lead to the enlargement of the gland, causing a bulge on the neck. Therefore, the doctor recommended an iodine- rich diet for Mary. On the other hand, Manoj’s bulge was due to the growth of his voice box as he entered puberty. This is a normal part of adolescent development and is often referred to as the Adam’s apple. It causes a bump in the throat and can lead to a hoarse voice as the voice box grows and changes shape.

9. 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: Physical changes during adolescence

Answer:

10. Prepare a poster mentioning the tips for adolescents to live a healthy lifestyle.

• Title: Tips for a Healthy Adolescent Lifestyle
• Tip 1: Eat a balanced diet with proteins, vitamins, and minerals for growth.
• Tip 2: Maintain personal hygiene, especially during menstruation for girls.
• Tip 3: Exercise regularly through sports or activities to stay fit and happy.
• Tip 4: Be respectful and responsible on social media to avoid cyberbullying.
• Tip 5: Say NO to harmful substances like tobacco, alcohol, and drugs.
• Tip 6: Talk to parents or teachers about emotions or problems for support.
• Design: Use bright colors, images of healthy food, exercise, and happy teens.