NCERT Solutions For Class 8 Science Chapter 7 Reaching The Age Of Adolescence LAQs

NCERT Solutions For Class 8 Science Chapter 7 Reaching The Age Of Adolescence LAQs

Question 1. Rohan and Seema were childhood friends. When Seema became eleven years old, her breasts started developing. Rohan’s voice became deeper, his shoulders and chest became wider.
Answer:

1. Give a word for the characteristics that are developed in Rohan and Seema.
Answer:

Both Rohnn and Seema have developed secondary sexual characteristics,

NCERT Class 8 Science Chapter 7 Reaching the Age of Adolescence LAQs

2. Name the hormone that is responsible for these sexual characteristics in Seema.
Answer:

Oestrogen is the hormone responsible for these sexual characteristics in Seema.

3. After a few years, Rohan observed a bulge in ills neck. What could be the possible reason for tills bulge in his neck?
Answer:

The bulge in Rohan’s neck is called Adam’s apple, which is formed because the male larynx grows bigger during puberty.

Question 2. Sanjay and Seoma were childhood friends. When Soenia became 12 years old, she developed a little swelling in her neck. She visited a doctor who prescribed some medicines and asked her to take an iodine-rich diet. After some time, she felt better. Later, her friend Sanjay also developed a little protrusion on his throat. He got worried. But when he went to the doctor, he assured him that it was normal. It was just the development of secondary sexual characteristics in him.
Answer:

1. Describe briefly the meaning of ‘secondary sexual characteristics’.
Answer:

The external characters that distinguish a male from a female are called secondary sexual characteristics. For example, the development of the breast in girls and the growth of moustaches in boys.

NCERT Solutions for Reaching the Age of Adolescence Chapter 7

2. Explain the change that Sanjay was experiencing.
Answer:

Sanjay was experiencing the enlargement of the voice box. The growing voice box in boys can be seen as a protruding part of the throat.

3. Recommend any two measures to Sanjay and Seema to maintain their reproductive health during adolescence.
Answer:

The measures that can be taken to maintain their reproductive health are as follows

1. Maintain personal hygiene
2. Take a balanced and nutritious diet

Question 3. When Sudlia reached a certain age tho vaginal bleeding started occurring after regular Interval of time. Her mother told her to take special care of her hygiene during this period.
Answer:

1. Name the process occurring after regular intervals.
Answer:

This process is known as menstruction

2. What does the onset of this process in females signify?
Answer:

The one set of menstruation signifies that the reproductive system of a female has started working

Class 8 Chapter 7 Reaching the Age of Adolescence Long Answer Questions

3. Give the reason why her mother told her to take special care of her hygiene during this period
Answer:

Her mother told her to take special care of her hygiene during this period because if it is maintained, there might be chances of not the occurrence of bacterial infections.

4. Shobha gave birth to a healthy baby girl. Her husband was unhappy with the news and held her responsible for the baby to do a girl. Was her husband just a flood of blaming her for the birth of a baby girl?
Answer:

No husband was not justified in blaming his Wife for the birth of a baby. As the unfertilized egg of a female always has one

1. Draw a diagram to show how the sex of a fetus is determined.
Answer:

Mother- XX Father – XY

Question 4. Observe the chart and graph given in the figure carefully and answer the following questions.

1. Which of the lines represents the height of boys?
2. Which line represents the height of girls?
3. What is the difference between the pattern of Increase in the height of boys and girls?
4. Is this pattern true for each individual?

Answer:

1. The dotted line represents the height of boys.
2. The solid line represents the height of girls.
3. At the onset of puberty, girls grow faster in height than boys, and by the age of 18 years, both reach their maximum height.
4. No, the rate of growth in height varies among individuals. Some may grow in height suddenly at puberty and then slow down, while others may grow gradually.

NCERT Solutions for LAQs on Reaching the Age of Adolescence

Question 5. Our government has legalised the age for marriage for boys and girls. Give reasons as to why one should get married after a certain age.
Answer:

In our country, the legal age for marriage is 18 years for girls and 21 years for boys. This is because teenage mothers are not prepared mentally or physically for motherhood.

Early marriage and motherhood cause health problems for both the mother and the child. It also curtails employment opportunities for the young woman and may cause mental agony as she is not ready to shoulder the responsibilities of motherhood.

Also, boys before that age may not be mentally mature and financially secure enough to take on the responsibilities of a family. Thus, one should get married only after a certain age.