Reaching the Age of Adolescence
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Adolescence and Physical Changes at Puberty
SubtopicAdolescence and Physical Changes at Puberty under Reaching the Age of Adolescence for Grade 8 CBSE.
Preview questions (no answers)
- 1.
During adolescence, the increased secretion of which glands can lead to increased body odor?
A.Thyroid glands
B.Sweat and oil glands
C.Pituitary glands
D.Adrenal glands
- 2.
The most conspicuous (noticeable) change during puberty is the:
A.Change in eye color
B.Sudden increase in height
C.Growth of fingernails
D.Change in blood group
- 3.
Growth in humans stops at the end of the adolescence period. After this, which of the following is true?
A.Height continues to increase until age 40
B.Only certain parts of the body like hair and nails grow
C.The body stops all biological processes
D.The person becomes shorter
- 4.
An adolescent is a person who is:
A.In the stage of childhood
B.In the period of life leading to reproductive maturity
C.Over the age of 60
D.An infant under 2 years
- 5.
What is the primary role of the pituitary gland in relation to other endocrine glands?
A.It produces all hormones needed by the body
B.It acts as a target for all other hormones
C.Its secretions instruct other glands to release their hormones
D.It filters hormones out of the blood
- 6.
Which gland maintains the correct salt balance in the blood?
A.Thyroid
B.Adrenal
C.Pancreas
D.Pituitary
- 7.
Why does the voice in boys sometimes become hoarse or 'crack' during puberty?
A.Due to a throat infection
B.Because the muscles of the growing voice box go out of control temporarily
C.Because they speak too much during this period
D.Due to the shrinking of the larynx
- 8.
Which of the following is true regarding the number of chromosomes in the gametes (sperm and egg) compared to other body cells?
A.Gametes have the same number of chromosomes as body cells.
B.Gametes have double the number of chromosomes.
C.Gametes have half the number of chromosomes.
D.Gametes have no chromosomes.
- 9.
In the context of the CBSE Science curriculum, how is the 'Health of an Adolescent' defined?
A.Only the absence of physical disease.
B.A state of physical, mental, and social well-being.
C.Having a height above the national average.
D.The ability to exercise for three hours daily.
- 10.
What happens to the rate of growth as an adolescent reaches the age of or ?
A.It doubles in speed.
B.It fluctuates wildly every month.
C.It slows down and eventually height reaches its maximum limit.
D.It shifts from skeletal growth to organ growth only.
Download the worksheet for Reaching the Age of Adolescence - Adolescence and Physical Changes at Puberty to practice offline. It includes additional chapter-level practice questions.
Secondary Sexual Characteristics
SubtopicSecondary Sexual Characteristics under Reaching the Age of Adolescence for Grade 8 CBSE.
Preview questions (no answers)
- 1.
The production of both male and female sex hormones is regulated by which gland?
A.Pituitary gland
B.Adrenal gland
C.Liver
D.Pancreas
- 2.
Adolescents are often called 'teenagers' because the period covers the ages of:
A.5 to 9
B.13 to 19
C.20 to 29
D.1 to 12
- 3.
Which of the following is a result of the hormone estrogen?
A.Cracking of voice
B.Growth of mustache
C.Breast development
D.Broadening of shoulders
- 4.
Hormones reach their target site through which system?
A.Digestive system
B.Circulatory system
C.Respiratory system
D.Excretory system
- 5.
The changes that occur during adolescence are part of the process of:
A.Aging and decline
B.Reaching adulthood
C.Physical injury recovery
D.Mental hibernation
- 6.
Which of these characteristics helps distinguish a boy from a girl after they have reached puberty?
A.Presence of hair on the head
B.Presence of facial hair in boys
C.Ability to walk
D.Presence of five fingers on each hand
- 7.
The production of gametes in adolescents is stimulated by hormones released by the:
A.Pituitary gland
B.Sweat glands
C.Salivary glands
D.Gastric glands
- 8.
What is the relationship between 'Puberty' and 'Secondary Sexual Characteristics'?
A.Puberty is the period of time during which secondary sexual characteristics develop.
B.Secondary sexual characteristics cause the onset of puberty.
C.Puberty only happens in males, while secondary sexual characteristics only happen in females.
D.They are two unrelated processes that happen at different times of life.
- 9.
Which of the following best describes the 'Secondary Sexual Characteristics' as a whole?
A.Internal changes that occur in the brain to increase intelligence.
B.Physical features that appear during puberty which distinguish the two sexes externally.
C.The characteristics that are passed from one generation to the next via DNA.
D.The changes in diet and sleep patterns that occur during the teenage years.
- 10.
How do androgens (like testosterone) affect the vocal folds in adolescent males to create a 'deepening' effect?
A.They cause the folds to become tighter and vibrate faster.
B.They increase the mass and length of the folds, slowing down their vibration frequency.
C.They dry out the mucus on the folds, making the sound rougher.
D.They cause the folds to disappear, allowing air to pass through more freely.
Download the worksheet for Reaching the Age of Adolescence - Secondary Sexual Characteristics to practice offline. It includes additional chapter-level practice questions.
Role of Endocrine Glands and Hormones
SubtopicRole of Endocrine Glands and Hormones under Reaching the Age of Adolescence for Grade 8 CBSE.
Preview questions (no answers)
- 1.
What is the primary function of thyroxine in the human body?
A.Maintaining salt balance
B.Regulating growth
C.Controlling the rate of metabolism
D.Regulating sugar level
- 2.
Which of these is NOT a function of the pituitary gland?
A.Secreting growth hormone
B.Regulating the thyroid gland
C.Secreting insulin
D.Regulating the adrenal gland
- 3.
Hormones are secreted by endocrine glands directly into the blood. What is the name of the specific part of the body where a hormone acts?
A.Starting site
B.End site
C.Target site
D.Hormonal site
- 4.
At the end of the reproductive phase in women, menstruation stops. This stage is known as:
A.Menarche
B.Menopause
C.Puberty
D.Adolescence
- 5.
Which of the following is a primary difference between a hormone and a nerve impulse?
A.Hormones are much faster than nerve impulses
B.Hormones are chemical signals while nerve impulses are electrical
C.Nerve impulses travel through the blood, while hormones travel through nerves
D.Hormones only affect the brain, while nerve impulses affect the whole body
- 6.
Which hormone promotes the development of the chest hair and the broadening of shoulders in adolescent boys?
A.Estrogen
B.Thyroxine
C.Insulin
D.Testosterone
- 7.
Why is it important for the pituitary gland to monitor other endocrine glands?
A.To produce its own hormones in larger amounts
B.To ensure that all hormones are released in the right quantities at the right time
C.To help the digestive system break down hormones
D.To prevent hormones from entering the bloodstream
- 8.
Which of the following best explains why 'Endocrine Glands' do not have ducts like the salivary or tear glands?
A.Ducts would be too small for the large hormone molecules to pass through.
B.Hormones must reach many different and far-reaching parts of the body simultaneously, which is best achieved via the circulatory system.
C.Hormones are gases and would escape if they were in a duct.
D.Endocrine glands are located inside bones where ducts cannot grow.
- 9.
When comparing the hormonal control of metamorphosis in frogs vs. insects, what is a major similarity?
A.Both require iodine from the environment to produce their hormones.
B.Both processes involve a total breakdown and reconstruction of the body controlled by specific chemical triggers.
C.Both use the exact same hormone called Adrenaline.
D.Both processes are independent of the nervous system.
- 10.
A certain 'Chemical X' is found to mimic the shape of Estrogen. If a young girl is exposed to high levels of Chemical X in the environment, what is a possible endocrine-related outcome?
A.She will experience 'Precocious Puberty' (onset of puberty at an abnormally early age).
B.She will stop growing taller immediately.
C.Her thyroid gland will stop producing thyroxine.
D.Her pancreas will stop producing insulin.
Download the worksheet for Reaching the Age of Adolescence - Role of Endocrine Glands and Hormones to practice offline. It includes additional chapter-level practice questions.
Reproductive Phase of Life in Humans
SubtopicReproductive Phase of Life in Humans under Reaching the Age of Adolescence for Grade 8 CBSE.
Preview questions (no answers)
- 1.
The period of life when the body undergoes changes leading to reproductive maturity is known as:
A.Adolescence
B.Childhood
C.Adulthood
D.Senescence
- 2.
Which gland secretes hormones that stimulate the maturation of eggs in the ovaries?
A.Adrenal
B.Pituitary
C.Pancreas
D.Thyroid
- 3.
Adolescents should avoid 'chips and packed snacks' as regular meals because:
A.They are too expensive
B.They do not have adequate nutritional value
C.They make people too tall
D.They are only for children
- 4.
Hormones reach their 'target site' through which of the following?
A.Nervous system
B.Bloodstream
C.Digestive tract
D.Respiratory system
- 5.
Which chromosome is donated by the mother to a male child?
A.Y chromosome
B.X chromosome
C.Both X and Y chromosomes
D.Neither X nor Y chromosome
- 6.
Why is the reproductive phase in females considered to be cyclic?
A.Because it lasts for a fixed number of years
B.Because the events of egg release and uterine changes repeat regularly
C.Because it only happens during certain seasons
D.Because hormones are only produced at night
- 7.
Which of these is a sign that a female has entered her reproductive phase?
A.Growth of milk-secreting glands
B.Occurrence of menarche
C.Broadening of hips
D.All of the above
- 8.
During the reproductive phase, the development of an egg is triggered by hormones from the pituitary. What is the target of these hormones in the female body?
A.The Uterus
B.The Ovaries
C.The Fallopian Tubes
D.The Vagina
- 9.
Which of the following is true regarding the chromosomal composition of a human egg cell?
A.It always contains one and one chromosome
B.It always contains a single chromosome
C.It always contains a single chromosome
D.It contains two chromosomes
- 10.
What happens to the unfertilized egg during the process of menstruation?
A.It is absorbed back into the blood
B.It is expelled from the body along with the uterine lining
C.It stays in the ovary for the next 28 days
D.It transforms into a hormone-producing gland
Download the worksheet for Reaching the Age of Adolescence - Reproductive Phase of Life in Humans to practice offline. It includes additional chapter-level practice questions.
Sex Determination and Reproductive Health
SubtopicSex Determination and Reproductive Health under Reaching the Age of Adolescence for Grade 8 CBSE.
Preview questions (no answers)
- 1.
How many chromosomes are found in a human female's skin cell?
A.None
B.One
C.Two
D.Twenty-three
- 2.
Which of these statements is scientific and true?
A.The mother is responsible for the sex of the baby
B.Chromosomes in the sperm determine the baby's sex
C.Menstruation is a disease
D.Eating pickles causes acne
- 3.
What is the role of fruits and vegetables in a balanced diet?
A.They provide only fats
B.They provide vitamins and minerals
C.They are the only source of protein
D.They have no nutritional value
- 4.
Which of these is important for preventing bacterial infections caused by increased sweat production in teens?
A.Using more talcum powder
B.Regular bathing
C.Drinking less water
D.Avoiding all physical activity
- 5.
Why is personal hygiene more critical during adolescence than during early childhood?
A.Because adolescents have more money
B.Because sweat and oil glands become more active
C.Because it helps in improving eyesight
D.Because it changes the blood group
- 6.
What is the correct chromosome composition of a human zygote that will develop into a female child?
A.B.C.D. - 7.
In which phase of life does the human body undergo changes leading to reproductive maturity?
A.Infancy
B.Adolescence
C.Senescence
D.Childhood
- 8.
If an adolescent's diet is deficient in iodine, which endocrine gland's function will be primarily affected, impacting overall health?
A.Adrenal Gland
B.Thyroid Gland
C.Pituitary Gland
D.Testes
- 9.
In the process of sex determination, if a sperm 'S' fuses with egg 'E' to form a female child, what must be the chromosomal content of 'S' and 'E'?
A.S has , E has
B.S has , E has
C.S has , E has
D.S has , E has
- 10.
The first menstrual flow at puberty is termed as:
A.Menopause
B.Menarche
C.Menstruation
D.Ovulation
Download the worksheet for Reaching the Age of Adolescence - Sex Determination and Reproductive Health to practice offline. It includes additional chapter-level practice questions.