NCERT Solutions for Class 8 Science Chapter 10: All CBSE Class 8 students can refer to this article for NCERT Solutions for Class 8 Science Chapter 10 – Reaching the Age of Adolescence. These solutions will help students clear the minutest of doubts. Also, they will prove to be the most helpful resources when preparing for final exams. The best thing is that you can download these solutions as a PDF to study offline.
Each question in Class 8 Science Solutions for Chapter 10 has been solved by the expert faculties at Embibe. Students can refer to this article to complete their assignments and homework on time. These solutions cover important topics from the 10th chapter including the meaning of adolescence, changes that occur during adolescence, hormones that are released prior to adolescence, sexual maturity in males and females, menstrual cycle and its consequences.
NCERT Solutions for Class 8 Science Chapter 10: Reaching the Adolescence
Prior to getting into the detailed Class 8 Solutions for Science subject Chapter 10, it is important for you to have knowledge of the topics and sub-topics covered in the chapter- ‘Reaching The Adolescence’. Check out the list below and click on any topic to download its solutions as a PDF.
NCERT Solutions For Class 8 Science Chapter 10 PDF Download
Reaching the Age of Adolescence chapter solutions includes explanations to all the questions included in the CBSE Class 8 textbook. These solutions are prepared by a team of academic experts in a systematic and well-explained manner. Moreover, the solutions are prepared according to the updated CBSE syllabus and guidelines.
- Chapter 1 – Crop Production and Management
- Chapter 2 – Microorganisms: Friend and Foe
- Chapter 3 – Synthetic Fibres and Plastics
- Chapter 4 – Materials: Metals and Non-Metals
- Chapter 5 – Coal and Petroleum
- Chapter 6 – Combustion and Flame
- Chapter 7 – Conservation of Plants and Animals
- Chapter 8 – Cell – Structure and Functions
- Chapter 9 – Reproduction in Animals
- Chapter 11 – Force and Pressure
- Chapter 12 – Friction
- Chapter 13 – Sound
- Chapter 14 – Chemical Effects of Electric Current
- Chapter 15 – Some Natural Phenomena
- Chapter 16 – Light
- Chapter 17 – Stars and the Solar System
- Chapter 18 – Pollution of Air and Water
NCERT Solutions for Class 8 Science Chapter 10: Chapter Summary
In this chapter, you will learn about changes that take place in the human body after which a person becomes capable of reproduction. You will also understand the role that hormones play in bringing about changes that make a child grow into an adult. Let us read the notes of NCERT Class 8 Chapter 10 given as follows:
What is Puberty?
It is the process of physical change through which a child matures into an adult. After puberty, boys and girls become capable of reproduction.
What is Adolescence?
The period of life, when the body undergoes changes, leading to reproductive maturity, is called adolescence. It begins around the age of 11 and lasts up to 18 or 19 years of age.
Changes in Puberty
Boys and girls undergo certain physical changes during puberty. These are:
- Increase in height
- Change in body shape
- Voice change
- Development of sex organs
- Reaching mental, intellectual, and emotional maturity
- Increased activity of sweat and sebaceous glands
What are Secondary Sexual Characters?
The features that help to distinguish the male from the female are called secondary sexual characters. For example: In girls, breasts begin to develop at puberty and boys begin to grow facial hair, that is, moustaches and beards.
Hormones: They are the chemical substances that control the changes in the body that occur in adolescence.
Menstruation: If the fertilization does not occur in females, the released egg and the thickened lining of the uterus along with the blood vessels are shed off. This causes bleeding in the female which is called menstruation.
Menarche: The first menstruation flow begins at puberty. This is termed as menarche.
Menopause: The stoppage of the menstruation cycle is called menopause. This occurs at the age of 45 to 50 years in females.
Chromosomes: Thread-like structures are present inside the fertilized egg or zygote. These are responsible for determining the sex of the body and are termed as chromosomes. All human beings have 23 pairs of chromosomes.
Balanced Diet: Balanced diet means meals that include proteins, carbohydrates, fats, and vitamins in requisite proportions. Since adolescence is a stage of rapid development, they should maintain a properly balanced diet.
FAQs Related To NCERT Solutions for Class 8 Science Chapter 10
Here we have provided some of the frequently asked questions related to this chapter:
A: The table is as follows:
A: The chemical substances produced by the sex organs are called sex hormones. For example, in females, the sex hormones produced by the ovary is called oestrogen and in males, the sex hormones produced by the testis is called testosterone.
Some of the functions performed by the sex hormones:
Oestrogen: This hormone is responsible for the development of secondary sexual characters in females like enlargement of breasts, development of female reproductive organs, etc.
Testosterone: This hormone brings the secondary sex character in boys such as the growth of beard, the voice becomes hoarse, development of the reproductive organs etc.
a) Adolescents should be careful about what they eat, because
(i) proper diet develops their brains.
(ii) proper diet is needed for the rapid growth taking place in their body.
(iii) adolescents feel hungry all the time.
(iv) taste buds are well developed in teenagers.
b) Reproductive age in women starts when their
(i) menstruation starts.
(ii) breasts start developing.
(iii) body weight increases.
(iv) height increases.
c) The right meal for adolescents consists of
(i) chips, noodles, coke.
(ii) chapati, dal, vegetables.
(iii) rice, noodles and burger.
(iv) vegetable cutlets, chips and lemon drink.
A: a) (ii) proper diet is needed for the rapid growth taking place in their body.
b) (i) menstruation starts.
c) (ii) chapati, dal, vegetables.
A: The period of life, when the body undergoes changes, leading to reproductive maturity is called adolescence.
A: When the egg produced by ovary does not get fertilised, the released egg and the thickened lining of the uterus along with its blood vessels are shed off. This causes bleeding in women which is called menstruation. Menstruation occurs once in about 28 to 30 days.
A: The changes in the body of puberty are:
(i) Sudden increase in height.
(ii) The bones of arms and legs elongate and make a person tall. (iii) Growing of hair at different parts of the body.
(iv) The voice of a boy gets hoarse.
(v) Development of sex organs.
(vi)Growth of moustaches and beards in the boys.
(vii) The breast in girls develops and hips become wider whereas in boys shoulders generally broaden.
In this chapter, you have learned about the difference between adolescence and puberty and the physical and chemical changes that take place in humans. You also learned the importance of a balanced diet. After having a quick revision, it is time for students to solve the questions of NCERT Class 8 Chapter 10. Refer to these solutions when you get stuck somewhere. Make the best use of these resources.
If you have any queries regarding this article, do let us know about it in the comment section below and we will get back to you at the earliest.