Adolescence is the bridge between childhood and adulthood. Chapter 7 of Class 8 Science, Reaching the Age of Adolescence, explains these changes. The chapter contains concepts like puberty, hormonal activity, and the development of secondary sexual characteristics. You are going to learn about important topics like the menstrual cycle, reproductive health, and the role of hormones in growth and development.
To help you revise the chapter, we’ve prepared MCQs and a match-the-following question based on this chapter. These questions cover key topics like endocrine glands, hormones like testosterone and estrogen, and changes in the body during adolescence. The interactive format of the question and answer ensures quick learning and better retention. So, lets start the exciting quiz. Its time to learn and have some fun while doing so.
Class 8 Science Chapter 7 MCQ Online Test Questions and Answers
Question 1. What marks the onset of puberty?
a) Growth of hair on arms
b) Sudden increase in height
c) Formation of zygote
d) Changes in voice
Answer:
b) Sudden increase in height
Question 2. What is the term for adolescents gaining the ability to reproduce?
a) Menopause
b) Menarche
c) Puberty
d) Adolescence
Answer:
c) Puberty
Question 3. What causes a boy’s voice to crack during puberty?
a) Growth of Adam’s apple
b) Hormonal imbalance
c) Development of testes
d) Increased activity of sweat glands
Answer:
a) Growth of Adam’s apple
Question 4. What is menstruation?
a) Release of sperms
b) Development of breasts
c) Monthly shedding of the uterine lining
d) Growth in height
Answer:
c) Monthly shedding of the uterine lining
Question 5. What is the role of testosterone in boys?
a) Development of ovaries
b) Growth of facial hair
c) Regulation of menstrual cycle
d) Voice becoming high-pitched
Answer:
b) Growth of facial hair
Question 6. Which gland controls the onset of puberty?
a) Thyroid gland
b) Adrenal gland
c) Pituitary gland
d) Pancreas
Answer:
c) Pituitary gland
Question 7. Which hormone is produced by ovaries?
a) Testosterone
b) Estrogen
c) Thyroxine
d) Insulin
Answer:
b) Estrogen
Question 8. What is a balanced diet?
a) A meal rich in carbohydrates
b) Chips and snacks with milk
c) A meal with proteins, fats, and vitamins
d) Fried food and sweets
Answer:
c) A meal with proteins, fats, and vitamins
Question 9. What is the legal age of marriage for girls in India?
a) 16 years
b) 18 years
c) 20 years
d) 21 years
Answer:
b) 18 years
Question 10. Which hormone regulates the menstrual cycle?
a) Insulin
b) Thyroxine
c) Estrogen
d) Testosterone
Answer:
c) Estrogen
Question 11. What determines the sex of a baby?
a) Chromosomes in the sperm
b) Chromosomes in the ovum
c) Hormones
d) Nutritional intake of the mother
Answer:
a) Chromosomes in the sperm
Question 12. What is the term for the first menstrual flow in girls?
a) Menopause
b) Menarche
c) Adolescence
d) Puberty
Answer:
b) Menarche
Question 13. What is the main function of endocrine glands?
a) Produce enzymes
b) Regulate blood pressure
c) Secrete hormones
d) Digest food
Answer:
c) Secrete hormones
Question 14. What does the pituitary gland secrete?
a) Thyroxine
b) Insulin
c) Growth hormone
d) Testosterone
Answer:
c) Growth hormone
Question 15. What happens if iodine is deficient in the diet?
a) Increased sweating
b) Stunted growth
c) Goitre
d) Weight loss
Answer:
c) Goitre
Question 16. Which food is rich in iron?
a) Chips
b) Leafy vegetables
c) Noodles
d) Candy
Answer:
b) Leafy vegetables
Question 17. What is the hormone secreted by the pancreas?
a) Adrenalin
b) Thyroxine
c) Insulin
d) Testosterone
Answer:
c) Insulin
Question 18. What does puberty lead to in girls?
a) Facial hair
b) Menstruation
c) Increase in shoulder width
d) Voice cracking
Answer:
b) Menstruation
Question 19. What are secondary sexual characteristics?
a) Body height and weight
b) Features distinguishing males from females
c) Growth of nails and hair
d) Shape of hands
Answer:
b) Features distinguishing males from females
Question 20. Which part of the body controls growth and puberty?
a) Heart
b) Brain
c) Lungs
d) Kidneys
Answer:
b) Brain
Question 21. What is the main function of the adrenal glands?
a) Produce testosterone
b) Maintain salt balance
c) Produce digestive enzymes
d) Release insulin
Answer:
b) Maintain salt balance
Question 22. What causes acne during puberty?
a) Increased hormone activity
b) Poor hygiene
c) Lack of sleep
d) Excessive exercise
Answer:
a) Increased hormone activity
Question 23. What is the role of estrogen in females?
a) Development of facial hair
b) Growth of mammary glands
c) Regulation of blood pressure
d) Secretion of sweat
Answer:
b) Growth of mammary glands
Question 24. Which hormone is responsible for the deepening of the voice in boys?
a) Thyroxine
b) Testosterone
c) Estrogen
d) Insulin
Answer:
b) Testosterone
Question 25. What is the term for the thread-like structures inside cells that determine the sex of a baby?
a) Hormones
b) Chromosomes
c) Genes
d) Nuclei
Answer:
b) Chromosomes
Question 26. Which sex chromosomes do females have?
a) XY
b) XX
c) YY
d) XZ
Answer:
b) XX
Question 27. What does the term adolescence refer to?
a) The end of childhood
b) The period between childhood and adulthood
c) The beginning of aging
d) The time when height stops increasing
Answer:
b) The period between childhood and adulthood
Question 28. What stops menstruation in women as they age?
a) Puberty
b) Menarche
c) Menopause
d) Fertilisation
Answer:
c) Menopause
Question 29. How many pairs of chromosomes are there in human cells?
a) 22
b) 23
c) 24
d) 25
Answer:
b) 23
Question 30. Which gland produces thyroxine?
a) Pancreas
b) Adrenal gland
c) Thyroid gland
d) Pituitary gland
Answer:
c) Thyroid gland
Question 31. Why do adolescents need a balanced diet?
a) For brain development
b) For rapid growth and development
c) To prevent voice cracking
d) To control body temperature
Answer:
b) For rapid growth and development
Question 32. Which hormone helps control sugar levels in the blood?
a) Thyroxine
b) Testosterone
c) Insulin
d) Estrogen
Answer:
c) Insulin
Question 33. What are hormones?
a) Chemicals secreted by digestive glands
b) Chemicals secreted by endocrine glands
c) Nutrients absorbed by the body
d) Enzymes that break down food
Answer:
b) Chemicals secreted by endocrine glands
Question 34 – Match the Following
| Column A | Column B |
|---|---|
| 1. Hormone produced by thyroid gland | A. Estrogen |
| 2. Male secondary sexual characteristics | B. Insulin |
| 3. Hormone regulating blood sugar | C. Testosterone |
| 4. Female reproductive hormone | D. Thyroxine |
| 5. Hormone produced by pancreas | E. Adrenalin |
Answer:
| Column A | Correct Answer |
|---|---|
| 1. Hormone produced by thyroid gland | D. Thyroxine |
| 2. Male secondary sexual characteristics | C. Testosterone |
| 3. Hormone regulating blood sugar | B. Insulin |
| 4. Female reproductive hormone | A. Estrogen |
| 5. Hormone produced by pancreas | B. Insulin |
