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Chapter 7

Science Class 8

49 of 49 questions

49
Total Questions
20
Easy
24
Medium
5
Hard
Q1
easyAdolescence Definition
What is the typical age range for adolescence?
A.5 to 10 years
B.11 to 19 years
C.20 to 25 years
D.8 to 12 years
Q2
easyPhysical Changes
What is the most conspicuous change during puberty?
A.Voice change
B.Sudden increase in height
C.Hair growth
D.Weight gain
Q3
mediumVoice Changes
What causes the voice to crack in adolescent boys?
A.Throat infection
B.Growing voice box (larynx)
C.Hormonal imbalance
D.Poor nutrition
Q4
easySecondary Sexual Characteristics
What is Adam's apple?
A.A fruit eaten during puberty
B.Protruding voice box in boys
C.A type of acne
D.Hair growth on face
Q5
easyHormones
Which hormone is responsible for male secondary sexual characteristics?
A.Estrogen
B.Insulin
C.Testosterone
D.Thyroxine
Q6
easyMenstrual Cycle
What is menstruation?
A.Growth of hair
B.Monthly shedding of uterine lining
C.Voice change in girls
D.Development of breasts
Q7
mediumEndocrine System
Which gland is known as the 'master gland'?
A.Thyroid gland
B.Pituitary gland
C.Pancreas
D.Adrenal gland
Q8
mediumSex Determination
Who determines the sex of an unborn baby?
A.The mother
B.The father
C.Both parents equally
D.The environment
Q9
easyReproductive Development
What is the first menstruation in a girl's life called?
A.Menopause
B.Menarche
C.Ovulation
D.Puberty
Q10
mediumNutrition
Why is balanced diet especially important during adolescence?
A.To prevent acne
B.For rapid growth and development
C.To control voice changes
D.To prevent height increase
Q11
mediumNutritional Needs
Which nutrient is especially important for blood formation in adolescents?
A.Calcium
B.Iron
C.Vitamin C
D.Protein
Q12
mediumSexual Development
What are secondary sexual characteristics?
A.Reproductive organs
B.Features that distinguish males from females
C.Primary sex organs
D.Hormones in blood
Q13
hardGrowth Calculations
If a 9-year-old boy is 120 cm tall and has reached 75% of his full height, what will be his predicted adult height?
A.150 cm
B.160 cm
C.140 cm
D.180 cm
Q14
mediumSkin Changes
What causes acne during adolescence?
A.Poor diet only
B.Increased activity of oil glands
C.Lack of exercise
D.Too much water
Q15
mediumThyroid Function
Which hormone controls growth and metabolism?
A.Insulin
B.Thyroxine
C.Adrenalin
D.Testosterone
Q16
easyMenstrual Cycle
What is the typical duration of a menstrual cycle?
A.15-20 days
B.28-30 days
C.35-40 days
D.10-15 days
Q17
easyEndocrine System
What are endocrine glands also called?
A.Ducted glands
B.Ductless glands
C.Sweat glands
D.Oil glands
Q18
mediumReproductive Timeline
At what age does menopause typically occur?
A.30-35 years
B.35-40 years
C.45-50 years
D.55-60 years
Q19
mediumSecondary Sexual Characteristics
Why do both boys and girls grow hair in certain regions during puberty?
A.Due to poor hygiene
B.It's a common secondary sexual characteristic
C.Due to increased height
D.Because of voice changes
Q20
mediumPancreatic Hormones
What is the function of insulin?
A.Controls growth
B.Regulates blood sugar
C.Controls voice changes
D.Manages stress response
Q21
mediumDevelopment Timing
Why do girls typically start adolescence earlier than boys?
A.They eat more
B.Natural biological variation
C.They exercise more
D.Environmental factors only
Q22
easySex Chromosomes
What is the correct chromosome combination for a female?
A.XY
B.XX
C.YY
D.XZ
Q23
mediumHygiene
Why is personal hygiene more important during adolescence?
A.To look good
B.Due to increased activity of sweat glands
C.To prevent height gain
D.To control hormones
Q24
easyHealth Safety
What should adolescents do if someone offers them drugs?
A.Try them once
B.Say 'No' unless prescribed by doctor
C.Ask friends first
D.Take them for stress relief
Q25
mediumStress Response
Which hormone is called the stress hormone?
A.Insulin
B.Thyroxine
C.Adrenalin
D.Estrogen
Q26
hardMetamorphosis
What happens if tadpoles don't get enough iodine in water?
A.They grow faster
B.They cannot metamorphose into frogs
C.They become larger
D.Nothing happens
Q27
mediumGenetics
Why is height often similar among family members?
A.They eat the same food
B.Height depends on genes inherited from parents
C.They live in the same place
D.They exercise together
Q28
mediumFemale Development
What causes girls' breasts to develop during puberty?
A.Increased exercise
B.Estrogen hormone
C.Better nutrition
D.Height increase
Q29
easySocial Awareness
What is the legal marriage age for girls in India?
A.16 years
B.18 years
C.21 years
D.25 years
Q30
mediumMale Development
Why do boys develop broader shoulders during puberty?
A.Due to increased food intake
B.It's part of male body shape development
C.Due to height increase
D.Because of voice changes
Q31
hardHormone Mechanism
What is the target site in hormone action?
A.The brain
B.Specific body part where hormone acts
C.The blood
D.All body parts equally
Q32
hardEmotional Development
Why is adolescence called a period of storm and stress?
A.Because of bad weather
B.Due to rapid physical and emotional changes
C.Because of school pressure
D.Due to poor nutrition
Q33
easyMenstrual Hygiene
What should be changed during menstruation for proper hygiene?
A.Diet only
B.Sanitary pads every 4-5 hours
C.Exercise routine
D.Sleep schedule
Q34
easyEndocrine System
Which endocrine gland is attached to the brain?
A.Thyroid
B.Pituitary
C.Pancreas
D.Adrenal
Q35
mediumIodine Deficiency
What can cause goiter?
A.Too much exercise
B.Lack of iodine in diet
C.Eating too much
D.Lack of sleep
Q36
mediumGrowth Patterns
Why do some body parts seem out of proportion during adolescence?
A.Due to poor nutrition
B.All parts don't grow at the same rate
C.Due to hormonal problems
D.Because of lack of exercise
Q37
easyGrowth Hormone
What is the function of growth hormone?
A.Controls reproduction
B.Controls overall body growth
C.Manages stress
D.Regulates blood sugar
Q38
mediumHIV/AIDS Awareness
How can HIV be transmitted?
A.Through air
B.Sharing injection needles, from infected mother to baby, unsafe sexual contact
C.Through food
D.Through mosquito bites
Q39
easyMale Hormones
What is the main function of testosterone?
A.Growth of female characteristics
B.Development of male characteristics
C.Control of blood sugar
D.Stress management
Q40
easyPhysical Exercise
Why is regular exercise important during adolescence?
A.To prevent height increase
B.To maintain physical and mental fitness
C.To control hormones
D.To prevent voice changes
Q41
mediumMenstrual Cycle Function
What causes the thickening of uterine wall during menstrual cycle?
A.To prepare for possible pregnancy
B.Due to infection
C.Due to poor diet
D.To prevent bleeding
Q42
easyNutrition Guidelines
Which type of food should be avoided by adolescents?
A.Fruits and vegetables
B.Milk and dairy products
C.Chips and packaged snacks
D.Whole grains
Q43
hardAnimal Hormones
What controls metamorphosis in frogs?
A.Insulin
B.Thyroxine
C.Adrenalin
D.Growth hormone
Q44
mediumEmotional Development
Why do teenagers often feel insecure during adolescence?
A.Due to poor grades
B.Due to rapid changes in body and mind
C.Due to lack of friends
D.Due to too much homework
Q45
easyFemale Hormones
What is the role of estrogen in females?
A.Causes voice deepening
B.Responsible for female characteristics and menstrual cycle
C.Controls height
D.Manages stress
Q46
mediumReproductive Lifespan
What happens to reproductive capacity in males compared to females?
A.Same duration for both
B.Lasts much longer in males than females
C.Shorter in males
D.Stops at same age for both
Q47
easyBalanced Diet
What is the ideal meal combination for adolescents according to the chapter?
A.Chips, noodles, coke
B.Roti/rice, dal, vegetables
C.Only fruits
D.Only meat
Q48
mediumSocial Issues
Why is early marriage harmful for adolescents?
A.It's against the law only
B.Teenagers are not prepared mentally or physically for parenthood
C.It costs too much money
D.They can't work
Q49
easyUnderstanding Development
What should adolescents understand about the changes they experience?
A.They are abnormal
B.They are temporary problems
C.They are natural part of growing up
D.They can be stopped