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Lakhmir Singh Science Class 8 Solutions Reaching the Age Adolescence (Chapter 10)

Lakhmir Singh Solutions for Class 8 Science Chapter 10 – Reaching the Age Adolescence describes the changes that take place in the human body after which a person becomes capable of reproduction. Here, the role that hormones play in getting about changes that make a child grow into an adult is briefly explained.

The main topics of Lakhmir Singh Solutions for chapter 10 – Reaching the Age Adolescence includes changes at puberty, adolescence at puberty, how is the sex of a new-born determined, reproductive phase of life in humans, hormones other than the sex hormones, reproductive health, roles of hormones in completing the life history of insects and frogs. It is one of the important and interesting chapters to study as it helps to understand the changes that take place in the body of a living being during different phases of life and how to deal with these changes.

This chapter of Lakhmir Singh Solutions for Class 8 Science consists of 5 exercises with a total of 130 questions. All the questions are according to the latest syllabus released by NCERT. Also, we have made the chapter interesting with our step-by-step solutions so that you can grasp the entire content properly. So, solving the exercises will help you prepare for the exams well.

Important Topics for Lakhmir Singh Solutions for Class 8 Science Chapter 10 – Reaching the Age Adolescence

The main topics and sub-topics of Lakhmir Singh Solutions for Chapter 10 – Reaching the Age Adolescence are provided below:

Puberty

The method of revolutions taking place during adolescence period is termed as puberty. The onset of puberty signifies the starting of adolescence. And the end of adolescence notifies about the finishing point of reproductive maturity.

The Changes that Takes Place during Puberty

The various changes that take place during puberty are listed below:

  • Increase in Height
  • Change in Body Shape
  • Change in Voice
  • Increased Activity of Sweat and Sebaceous Glands
  • Development of Sex Organs
  • Reaching Mental, Intellectual and Emotional Maturity

Hormones

Hormones are the chemical constituents concealed by endocrine glands for appropriate functioning taking place during puberty in the human body. In males, at the starting of puberty, the hormone or testosterone starts to get produced by the testes. And this results in the growth of facial hair, deep voice, and hair on the chest whereas, in females, ovaries start to release the female hormone or estrogen which results in the growth of the breasts on reaching puberty. Also, milk discharging glands or mammary glands growth takes place inside the breasts.

Sex Determination

How to determine if it is a Boy or Girl? The gender of a child is reliant on the grouping of genetic material taking place in the zygote. In human beings, generally, a cell has 46 chromosomes, i.e. a total of 23 pairs of chromosomes. Out of these 46 chromosomes available, 22 pairs are identical. But chromosomes in the 23rd pair can either be the same or different.

There are two kinds of chromosomes in the 23rd pair. They are called X and Y chromosomes. The 23rd pair in a male has a grouping of XY, while in the case of females it has a grouping of XX.

  • Birth of a girl will take place when a sperm with an X chromosome fertilizes the egg.
  • Birth of a boy will take place when a sperm with the Y chromosome fertilizes the egg.

Exercise-Wise Discussion of Lakhmir Singh Solutions Class 8 Science Chapter 10 – Reaching the Age Adolescence

This chapter of Class 8 Science has a total of 5 exercises with a total of 130 questions which are entirely based on the latest exam pattern. The questions range from basic to advance level so that you can easily understand each and every topic of the chapter. Some exercises are divided as follows:

Exercise 1 – Very Short Answer Type Questions

The first exercise of the chapter has around 51 questions which are very short answer type questions. These questions are based on the changes that take place in the human body after which a person becomes capable of reproduction.

Exercise 2 – Short Answer Type Questions

This exercise has around 45 questions which are completely related to the main topics of this chapter including changes at puberty, adolescence at puberty, how is the sex of a new-born determined, reproductive phase of life in humans, hormones other than the sex hormones, reproductive health, roles of hormones in completing the life history of insects and frogs.

Exercise 3 – Long Answer Type Questions

This exercise set has a total of 9 questions in which you need to give a proper explanation of the situation mentioned. 

Exercise 4 – Multiple Choice Question (MCQs)

This exercise set has a total of 20 questions in which you need to choose the right answer from the options given.

Exercise 5 – Questions Based on High Order Thinking Skills

This exercise set has a total of 5 questions in which there are questions based on high order thinking skills. These questions will help you clear your concepts and have a better understanding of the chapter.

If you face issues in solving the questions, you can refer to Lakhmir Singh Solutions for Class 8 Science Chapter 10 – Reaching the Age Adolescence by Instasolv.

Benefits of Lakhmir Singh and Manjit Kaur Solutions for Class 8 Science Chapter 10 – Reaching the Age Adolescence

  • At Instasolv, our main aim is to provide you with high-quality Lakhmir Singh and Manjit Kaur Solutions for Class 8 Science Chapter 10 that will clear all your doubts and will help you excel in your exams.
  • All the solutions are prepared by our expert Science teachers for your better understanding.
  • Our solutions will prove helpful for you to score high marks if you study them step by step.
  • Our Lakhmir Singh Class 8 Science Solutions for Chapter 10 are accurate and easy to understand.
  • All our solutions are prepared as per the latest guidelines of NCERT that will help you in writing answers as per the CBSE’s course.

Class 8 is nothing but the existing base of all the building blocks of science in higher classes. If you are studying in CBSE Class 8 then you can easily get the solutions available at Instasolv. We have curated the detailed solutions of chapter 10 – Reaching the Age Adolescence of class 8 Science so that there is no space for any kind of doubt regarding Lakhmir Singh Solutions for Class 8 Science.