Chapter-wise NCERT Solutions for Class 7 Science Chapter 6 Adolescence A Stage of Growth and Change Class 7 Questions and Answers are useful for focused study.
Class 7 Science Chapter 6 Adolescence A Stage of Growth and Change Question Answer
Science Class 7 Chapter 6 Question Answer Adolescence A Stage of Growth and Change
Adolescence A Stage of Growth and Change Class 7 Question Answer (InText)
Question 1.
Adolescents, especially girls, may sometimes suffer from blood-related health problems (s) because of a deficiency of iron or vitamin B12 in the body. (Page 80)
(i) Find out about such health problem(s).
[ii] How can we manage iron deficiency in our body?
(iii) Find out about government schemes aimed to prevent such deficiencies.
Answer:
(i) A common blood-related health problem caused by a deficiency of iron or vitamin B12 is anaemia. In anaemia, the amount of haemoglobin in the blood becomes low. Haemoglobin helps carry oxygen in the blood, so when its level is low, the blood cannot carry enough oxygen to different parts of the body. As a result, a person feel tired, weak, and dizzy.
(ii) By consuming iron-rich foods like green leafy vegetables, beans, lentils, fortified cereals, and meat, one can overcome iron deficiency.
(iii) Some of the government schemes are:
(a) NIPI-National Iron Plus Initiative Control of Iron Deficiency Anaemia
(b) Mid-day Meal Scheme
(c) Anaemia Mukt Bharat (AMB)
Question 2.
Discuss the sources of vitamin B12 with your teacher. (Page 80)
Answer:
Vitamin B12 is primarily found in animal- based foods such as milk, meat, fish, poultry, eggs, and dairy products. It’s essential for red blood cell formation, neurological function, and DNA synthesis.
NCERT Class 7 Science Chapter 6 Question Answer Adolescence A Stage of Growth and Change (Exercise)
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Question 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?
(ii) What can he do to get some relief from these pimples?
Answer:
(i) The pimples on Ramesh’s face could be due to the hormonal changes that occur during puberty. During this time, the body produces more hormones, which can make the skin’s oil glands produce more oil. This excess oil can clog the pores, leading to pimples or acne.
(ii) Ramesh can get some relief from pimples if he:
- Uses gentle cleanser for his face
- Drinks plenty of water
- Incorporates a balanced diet into his life
- Avoid squeezing or picking the pimples, as it can worsen the condition.
Question 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.
Question 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.
(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 urtvpeb.
(iv) We should say NO to lahoclo and srugd as they are addictive.
Answer:
- nstmnoiaretu-menstruation
- iceov xob-voice box
- urtypeb-puberty
- lahoclo and srugd-alcohol and drugs
Question 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.
Question 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.
(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 (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?
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?
Question 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 undergo several behavioural changes, including:
- Intense emotions that may change quickly
- A strong desire for independence and personal decision-making
- Pressure to fit in with peers and follow group norms
- Exploration of personal identity, including sexual identity
- Increased use of technology, such as mobile phones and social media.
Question 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.
- Regularly change the sanitary pads, after every 4-5 hours as per the requirement.
- Wash genital areas properly to maintain cleanliness and prevent catching bacterial infections.
- Dispose of used sanitary pads by wrapping them in a newspaper before throwing them inside a dustbin.
- Wash hands thoroughly with soap and water before and after handling sanitary pads to prevent the spread of germs.
Question 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 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.
Question 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 | ||
| Observed only in boys | Observed only in girls | Common in boys and girls |
Answer:
| Physical changes during adolescence | ||
| Observed only in boys | Observed only in girls | Common in boys and girls |
| (i) Change in voice | (ii) Development of breasts | (v) Pimples on the face |
| (iii) Growth of moustache | (vi) Growth of hair in the pubic region | |
| (iv) Growth of facial hair | (vii) Growth of hair in armpits | |
Question 10.
Prepare a poster mentioning the tips for adolescents to live a healthy lifestyle.
Answer:
Do it yourself.
Class 7 Adolescence A Stage of Growth and Change Question Answer (Activities)
Activity 6.1: Let Us Discuss (Pages 74-75)
Answer:
Do it yourself.
Activity 6.2: Let Us List (page 78)
Table 6.2: Emotional changes, their probable effects on behaviour, and ways for positive growth and development
| Key emotional changes | Probable effects on behaviour | Ways for positive growth and development |
| Mood swings | Engage in varied activities like music, dance, or sports | Self-exploration and involvement in activities that may lead to creativity and innovation |
| Strong emotions | Increased sensitivity | Compassion, involvement in social work |
| Fear or insecurity | Self-doubt | Practicing kindness toward yourself |
Activity 6.3: Let Us List (Page 79)
Table 6.3: Food sources, nutrients present in them, and functions of these nutrients
| Food sources | Nutrients we get from them | Functions of these nutrients |
| Milk, millet, curd, cheese, and paneer | Calcium, proteins, fats, vitamins, minerals | To help optimal bone growth, keens teeth healthy |
| Pulses, beans, milk. meat, butter, wheat, rice, and maize | Proteins, fats and carbohydrates | To help proper growth, gain strength, and improve levels of energv and renair of damaged cells |
| Spinach, kidney beans, and dried fruits like raisins, and figs | Iron,dietary fibres | To help in the formation of blood,and removes undigested food from the body |
Activity 6.4: Let Us Spread Awareness (Page 83)
Table 6.4: Dos and don’ts to be followed on social media
| Dos | Don’ts |
| Be respectful and kind. | Do not share personal photos with strangers/ virtual friends. |
| Think before posting. | Do not share Dersonal information with strangers/virtual friends |
| Protect privacy | Do not share vour location wherever vou are travelling. |