Online Shiksha

By Savita S. More

Class 8 Science Reaching the Age of Adolescence Notes

Last updated on June 28th, 2023 at 11:08 pm

Class 8 Reaching the Age of Adolescence Notes

Get the complete notes on Class 8 Reaching the Age of Adolescence. Our experts have put together a comprehensive overview to help you understand the key concepts, theories, and facts related to this topic. Learn quickly and ace your exams with our easy

What are the defining characteristics of adolescence?
Adolescence is the stage between childhood and adulthood, characterized by rapid physical growth and hormonal changes.

What is the typical age range for the onset of adolescence in girls and boys?
The onset of adolescence varies between individuals, but usually occurs between the ages of 10 and 12 years for girls and 12 and 14 years for boys.

What are some of the physical changes that occur during adolescence?
During adolescence, the body undergoes several physical changes, including growth spurts, changes in body shape, and the development of secondary sexual characteristics.

What are some of the emotional and psychological changes that can occur during adolescence?
Hormonal changes during adolescence can cause emotional and psychological changes, such as mood swings, increased self-consciousness, and heightened sensitivity to peer pressure.

What are some essential components of a balanced diet during adolescence?
Proper nutrition is essential for healthy growth and development during adolescence. A balanced diet should include sufficient amounts of protein, carbohydrates, fats, vitamins, and minerals.

What are some recommended personal hygiene practices for adolescents?
Personal hygiene is important during adolescence, as sweat glands become more active and oil glands on the skin become more active. Adolescents should bathe regularly, use deodorant, and brush their teeth twice a day.

What are some benefits of regular physical activity for adolescents ?
Adolescents should engage in regular physical activity to maintain good health and fitness. Exercise can also help to relieve stress and improve mood.

What is the typical duration of puberty?
Puberty can begin as early as 8 years or as late as 16 years. It can last for several years, and its effects can be felt into early adulthood.

What are some of the emotional and psychological challenges that adolescents may face?
Adolescents may face a variety of emotional and psychological challenges, including peer pressure, anxiety, and depression. It is important to provide support and guidance during this stage to help them develop into healthy, well-adjusted adults.

What is menstruation? Explain.
Menstruation is a natural process in the female reproductive system that involves the shedding of the endometrial lining once a month. This process is regulated by hormones and is designed to prepare the body for pregnancy. If pregnancy does not occur, the lining is shed and results in bleeding from the vagina, which is commonly known as a period. This process can continue from adolescence until menopause and can be accompanied by various physical and emotional symptoms.

List changes in the body that take place at puberty.

Puberty is the period of physical and psychological development during which a child matures into an adult. Both males and females undergo numerous changes during puberty. Puberty causes the following changes:
Girls and boys experience a rapid growth in height and weight during puberty as a result of growth hormones.
A deeper voice is experienced by boys when their larynx grows and their vocal cords lengthen.
A female’s menstruation begins when the ovaries release eggs and the uterus prepares to become pregnant.
Males and females develop pubic hair, underarm hair, and leg hair.
Hormonal changes can increase oil production, causing acne.
Testosterone and other hormones cause boys to develop more muscle mass and strength, while girls also experience some muscle growth.
Puberty and its accompanying social and psychological changes often result in mood swings and emotional ups and downs for adolescents.

What are sex hormones? Why are they named so? State their function.

In males and females, the gonads (testes and ovaries) and adrenal glands produce sex hormones. They play a crucial role in the development and regulation of sexual characteristics.

Androgens (such as testosterone) and estrogens (such as estradiol) are the two primary types of sex hormones. Androgens are typically thought of as male hormones, while estrogens are typically thought of as female hormones, but both types of hormones are present in both sexes, albeit in different quantities.

Chapter 17 –  Stars and the Solar System Extra Question Answers
Chapter 18- Pollution of Air and Water Extra Question Answers

Q: What is adolescence?

A: Adolescence is the period of life when the body undergoes changes leading to reproductive maturity. It begins around the age of 11 and lasts up to 18 or 19 years of age. Adolescents are also called teenagers as this period covers the ‘teens’ (13 to 18 or 19 years of age).

Q: Why can humans and many other animals reproduce only after reaching a certain age?

A: Humans and many other animals can reproduce only after reaching a certain age because the body undergoes changes that make reproduction possible. These changes include the development of reproductive organs, hormonal changes, and the ability to produce viable gametes.

Q: When does adolescence begin and how long does it last?

A: Adolescence begins around the age of 11 and lasts up to 18 or 19 years of age. However, the period of adolescence may begin a year or two earlier in girls than in boys, and the duration of adolescence can vary from person to person.

Q: What are adolescents also called?

A: Adolescents are also called teenagers as this period covers the ‘teens’ (13 to 18 or 19 years of age).

Q: What is puberty?

A: Puberty is the period of adolescence when boys and girls become capable of reproduction. It is the most important change that marks adolescence and ends when an adolescent reaches reproductive maturity.

Q: What is the most conspicuous change during puberty?

A: The most conspicuous change during puberty is the sudden increase in height due to the elongation of long bones in the arms and legs.

Q: What changes do both boys and girls experience during puberty?

A: During puberty, both boys and girls experience changes in height and body shape.

Q: Do boys and girls grow at the same rate during puberty?

A: Girls tend to grow faster initially, but both genders reach their maximum height by around 18 years of age. Different individuals may experience varying rates of growth during puberty.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

online-shiksha © 2023 Frontier Theme