Class 8 Science Chapter 7 MCQ (Multiple Choice Questions) of reaching the Age of Adolescence updated for academic session 2025-26. All the MCQs are important for the school unit tests as well as terminal or periodic exams. Practice here MCQ online test with answers and explanation of each questions to prepare the chapter and become confident in all topics of chapter 7 of class 8 science. These MCQ quiz covers the complete chapter 7 reaching the Age of Adolescence from CBSE class viii science.
Class 8 Science Chapter 7 MCQ
Class: 8 | Science |
Chapter: 7 | Reaching the Age of Adolescence |
Contents: | MCQ Online Test with Explanation |
Session: | 2025-26 |
MCQ Tests with Answers for Class 8 Science Chapter 7
Q1
AIDS can spread from an infected person to another person through:
[A]. Sharing food
[B]. Blood transfusion
[C]. Sharing comb
[D]. A mosquito bite
Q2
Given below are events that lead to pregnancy and development of the embryo. Which of the following options gives the correct order of sequence in which they occur?
[A]. Fertilization of egg, Maturation of egg, Release of egg, Embedding of the embryo in uterus.
[B]. Maturation of egg, Fertilization of egg, Release of egg, Embedding of the embryo in uterus.
[C]. Fertilization of egg, Embedding of the embryo in uterus, Maturation of egg, Release of egg.
[D]. Maturation of egg, Release of egg, Fertilization of egg, Embedding of the embryo in uterus.
Q3
For the metamorphosis of tadpoles which of the following elements must be available in water?
[A]. Chlorine
[B]. Carbon
[C]. Sulphur
[D]. Iodine
Q4
The most conspicuous visible change that occurs in boys during puberty is:
[A]. Development in the voice box.
[B]. Increase in height.
[C]. Production of sperms.
[D]. Increased sweating.
Q5
Consider the following statements and choose the incorrect one:
[A]. In females, the uterine wall thickens to receive the fertilised egg.
[B]. Endocrine glands release hormones directly into blood stream for transportation to the target site.
[C]. The sex hormones, adrenaline and oestrogen are responsible for the development of sexual characters.
[D]. Release of sex hormones is under the control of a hormone secreted from the pituitary gland.
Q6
The right meal for adolescents consists of:
[A]. Chips, noodles etc.
[B]. Chapati, dal, vegetables.
[C]. Rice, noodles, burger
[D]. Vegetable cutlet, puri, cold drink
Q7
Read the following sentences carefully, and choose the incorrect one:
[A]. [A] Testosterone hormone produces male secondary sexual characteristics in boys at puberty (such as deeper voice, growth of facial hair etc.)
[B]. Testosterone hormone causes “growth spurt” in boys at puberty.
[C]. Testosterone hormone causes the growth and development of male sex organs at puberty.
[D]. None of the above.
Q8
Priya is writing some statements, choose the correct statement and help her:
[A]. In a frog, metamorphosis is brought about by thyroxine hormone.
[B]. The production of thyroxine hormone requires the presence of iodine in water.
[C]. All the amphibians need thyroxine hormone to undergo metamorphosis and change from larva into adults.
[D]. All the above.
Q9
Vikash is doing his homework which is given by his teacher. Would you help him to choose the incorrect sentences?
[A]. Adrenals are endocrine glands.
[B]. Adrenal glands are known as emergency hormone.
[C]. The aldosterone hormone secreted by adrenal glands maintain the correct salt balance in the blood.
[D]. None of the above.
Q11
Payel is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Payel wants to take help from you:
[A]. Thyroid is a large endocrine gland in the neck.
[B]. Thyroid gland makes a hormone called thyroxine which contains iodine.
[C]. The deficiency of thyroxine hormone causes a disease known as “goitre”.
[D]. People are advised to take iodised salt which contains appropriate amount of sodium chloride.
Q12
The sex of a child is determined by:
[A]. The presence of an X chromosomes in egg (or ovum)
[B]. The presence of a Y chromosomes in sperm
[C]. The egg of father and mother
[D]. The length of the mother’s pregnancy
Q13
Adolescents should be careful about what they eat because adolescents should be careful about what they eat because:
[A]. Proper diet develops their brains
[B]. Proper diet is needed for the rapid growth taking place in their body
[C]. Adolescents feel hungry all the time
[D]. Taste buds are well developed in teenagers
Q14
Which of the following is a mis-matched pair?
[A]. Adrenaline : Pituitary gland
[B]. Estrogen : Ovary
[C]. Pancreas : Insulin
[D]. Testosterone : Testis
Q15
Puja is writing some statements but she confused to know whether the statements are correct or not? If you know the answer to this question, then tell her:
[A]. Regular physical exercise in fresh air keeps the body fit.
[B]. Regular physical exercise also improves the mental health.
[C]. Physical exercise builds and maintains healthy muscles, bones and joints.
[D]. All the above.
Q16
In the last year board examination, Rahul were asked a question where he had to choose the statement which was/were correct? Will you be able to answer this question?
[A]. The ovaries start releasing mature eggs or ova at puberty.
[B]. The testes begin to produce male sex cells called “sperms” at puberty.
[C]. Adolescence is the time in one’s life when the brain has the greatest capacity for learning.
[D]. All the above.
Q17
In a quiz competition, you are asked a question where you have to choose the statement which is/ are correct?
[A]. A gland which secretes its product into a duct is called an exocrine gland.
[B]. Sweat glands and sebaceous glands or oil glands are exocrine glands.
[C]. A gland which does not have a duct and secretes its product directly into the blood stream, is called an endocrine gland.
[D]. All the above.
Q18
Estrogen hormone performs the following function. Choose the correct functions of this hormones:
[A]. Estrogen hormone produces female secondary sexual characteristics in girls at puberty (i.e., development of breast, broader hips).
[B]. Estrogen hormone causes the growth and development of female sex organs at puberty.
[C]. Estrogen hormone brings about the monthly preparation of uterus for pregnancy.
[D]. All the above.
Q19
The dramatic changes in body features associated with puberty are mainly because of the secretions of:
[A]. Thyroxine and Estrogen
[B]. Estrogen and Adrenaline
[C]. Thyroxine and Adrenaline
[D]. Estrogen and Testosterone
Q20
Which of the following is the secondary sexual characteristics in females?
[A]. Low pitched voice
[B]. Broadening of chest
[C]. Broadening of hip
[D]. Developing Adam’s apple
Q21
A ten-year-old boy is 125 cm tall. If the present height of the boy is 78% of his full height, calculate the full height which the boy will eventually reach at the end of growth period.
[A]. 150.75
[B]. 160.25
[C]. 147.15
[D]. 163.85
Q22
The various changes which occur in boys during puberty is or correct:
[A]. Testis and penis become larger
[B]. Chest and shoulders of boys broaden or become wider
[C]. Hair grows in armpits and in pubic regions or genital area between the thighs.
[D]. All the above.
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Last Edited: June 12, 2023