Thursday 21 October 2021

Class 8 Biology - Reaching the Age of Adolescence (Worksheet) (#class8Biology)(#class8Science)(#eduvictors)

Class 8 Biology - Reaching the Age of Adolescence (Worksheet)

Class 8 Biology - Reaching the Age of Adolescence (Worksheet) (#class8Biology)(#class8Science)(#eduvictors)

Fill in the blanks with suitable words.

1. The period of life, when the body undergoes certain noticeable changes, leading to reproductive maturity is called __________. 

2 _______ is the start of the time when a boy is biologically ready to become a father and a girl is ready to become a mother.

3. ______ are thread-like structures in the nucleus carrying genetic information.

4. During childhood, girls and boys are similar in height. During puberty, both sexes rapidly become taller. But on average, boys usually end up ______ adults than girls.

5. During puberty the reproductive or _______ cycle begins in girls while reproductive organs in the male body begin to develop sperm cells.

6. _______ sexual characters are those features that help to distinguish the male from the female. 

7. The change at puberty is controlled by _______.

8.  ________ glands are a group of specialized cells that produce and secrete hormones. They are ______ glands that release their secretions directly into the blood.

9. _____ gland that releases their secretions with the help of ducts at the specific site. e.g. Salivary gland

Directions: Identify the glands in the following.

10. Master gland of body: __________

11. Thyroxine: __________

12. Insulin: ________

13. Testosterone: ___________

14. Oestrogen: __________

15. Adam's apple is prominent in __________.

16. Pimples appear mostly in puberty, it is due to increased activity of sweat and ________ glands.

17. The first menstrual flow begins at puberty, it is called ________. At age of 45 - 50 years, this reproductive cycle stops and is termed as ________.

18. Follicle-stimulating hormone (FSH) is a hormone associated with reproduction and the development of eggs in women and sperm in men. This hormone is made by the _____ gland.

19. Which hormone is often called as fight or flight hormone? ____ 

20. The enlargement of the thyroid gland due to the deficiency of iodine in the blood causes a disease called _______.


1. adolescence

2. Puberty

3. Chromosomes

4. taller

5. menstrual

6. Secondary

7. hormones

8. Endocrine, ductless

9. Exocrine

10. Pituitary

11. Thyroid gland

12. Pancreas

13. Testes

14. Ovaries

15. boys

16. sebaceous

17. menarche, menopause

18. pituitary

19. Adrenaline

20. goitre

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