NCERT Solutions for Class 8 Science Chapter 10: Reaching the Age of Adolescence

In this chapter, we will read about adolescence and puberty. We will learn about the various physical, mental, and emotional changes people go through during this period. The chapter also tells us about the various sexual changes that children might experience in their puberty. We also study about the development of secondary sexual characteristics in children. We will also read about sex hormones and also other hormones that develop during this adolescence. The chapter ends by giving us a brief about reproductive health and the nutritional requirements during this age.

• The period of life when the body undergoes sexual maturity is known as adolescence.
• The human body experiences many changes during this period of puberty.
• This chapter talks about the various changes that occur during this age.
• These changes include increased height, change in body shape, voice changes, and increased activity of sweat glands.
• Children also experience mental, intellectual, and emotional maturity, as explained in the chapter.
• Secondary sexual characteristics also develop during this stage.
• This includes the growth of facial hair in boys and the growth of mammary glands in girls.
• The chapter also tells us about the development of hormones in both boys and girls.
• We also learn about the menstrual cycle, which only occurs in girls.
• The chapter further tells us about chromosomes and their role in determining the sex of a baby.
• We also read about the growth of non-sexual hormones like growth hormones and adrenaline.
• The chapter also covers the role in hormones in the lives of frogs and insects.
• We also learn about reproductive health during this stage.
• The chapter ends by warning adolescent children about the harmful effects of drugs on our body.