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CBSE · Class 7 · Science

Adolescence: A Stage of Growth and Change

Standard difficulty · 20 questions · 40 marks

Name: Date: Score: ____ / 40

Show your working for Sections B and C. Answers are on the last page — try every question first!

Section A — Choose the correct answer8 × 1 = 8 marks
1.
Adolescence is roughly the period of life between the ages of:
  1. 25 and 35 years
  2. 50 and 60 years
  3. 2 and 5 years
  4. 10 and 19 years
2.
Spinach is a good source of:
  1. vitamin C
  2. iodine
  3. iron
  4. protein
3.
Which of these is a HEALTHY habit?
  1. squeezing pimples
  2. eating chips instead of meals
  3. skipping breakfast every day
  4. drinking enough water
4.
Which of these is an UNHEALTHY habit?
  1. squeezing pimples
  2. playing a sport
  3. eating fruit and vegetables
  4. sleeping 8–9 hours
5.
Which of these keeps you SAFE online?
  1. sharing your password with a friend
  2. replying rudely to a bully
  3. not sharing your home address
  4. posting your school and address
6.
A child is 139 cm tall and grows about 7 cm a year. About how tall will the child be after 2 years?
  1. 160 cm
  2. 146 cm
  3. 153 cm
  4. 141 cm
7.
A child plays sport for 41 minutes every day. How many minutes is that in a week?
  1. 205 minutes
  2. 287 minutes
  3. 48 minutes
  4. 328 minutes
8.
An adolescent sleeps 10 hours each night. How many hours of sleep is that in 12 nights?
  1. 110 hours
  2. 22 hours
  3. 120 hours
  4. 130 hours
Section B — Short answer8 × 2 = 16 marks
9.
What is adolescence?
10.
Which nutrient (calcium, iron or protein) is each a good source of? (a) eggs (b) jaggery
11.
Write "healthy" or "unhealthy": (a) trying tobacco or gutka (b) using a phone late into the night
12.
Is it "safe" or "unsafe" online? (a) posting your school and address (b) sharing your password with a friend
13.
Why does each happen during adolescence? (a) growing taller quickly (b) mood swings
14.
An adolescent drinks 10 glasses of water a day, each 250 mL. How many litres is that?
15.
Adolescence lasts from about 10 to 19 years. A child is 10. How many more years until the age of 18?
16.
A teenager spends 2 hours a day on a phone. If they cut it by half and play outdoors instead, how many hours of outdoor play do they gain in 4 days?
Section C — Word problems4 × 4 = 16 marks
17.
Describe four physical changes and two emotional changes that happen during adolescence.
18.
Plan a day's meals for an adolescent using dates, milk, sesame seeds (til), eggs. Which nutrient does each give, and why is it needed in adolescence?
19.
A friend's day includes: squeezing pimples; talking to a trusted adult when worried; bathing every day; keeping worries to yourself always. Which habits are healthy and which are not? Suggest a better choice for each unhealthy one.
20.
Which of these are safe and which unsafe online: blocking a stranger who troubles you; keeping your password secret; sharing your password with a friend; posting your school and address? What should you do if someone bullies you online?
AmbifulWorksheets
Practice that never repeats
CBSE · Class 7 · Science

Answer key

Adolescence: A Stage of Growth and Change · AW-7S-ADO-2026-V1 · For parents — fold back or tear off before handing the sheet to your child.

QAnswerWorking
1(d) 10 and 19 years—
2(c) iron—
3(d) drinking enough water—
4(a) squeezing pimples—
5(c) not sharing your home address—
6(c) 153 cm139 + 7 × 2 = 153
7(b) 287 minutes41 × 7 = 287
8(c) 120 hours10 × 12 = 120
9The stage of life, roughly 10 to 19 years, when the body and mind change from childhood to adulthood.—
10(a) protein (b) iron—
11(a) unhealthy (b) unhealthy—
12(a) unsafe (b) unsafe—
13(a) a growth spurt driven by hormones (b) hormones and new feelings—
142.5 L10 × 250 = 2500 mL
158 years18 − 10 = 8
164 hours2 ÷ 2 × 4
17Physical: increase in height and weight; growth of hair in the armpits; the voice box grows (the voice deepens, more in boys); the skin becomes oily and pimples may appear. Emotional: mood swings and strong feelings; wanting more independence; being more sensitive.—
18dates: iron; milk: calcium; sesame seeds (til): calcium; eggs: protein. Calcium builds strong bones, iron is needed for healthy blood, and protein for growth.—
19Healthy: talking to a trusted adult when worried; bathing every day. Unhealthy: squeezing pimples; keeping worries to yourself always. Any sensible better choices.—
20Safe: blocking a stranger who troubles you; keeping your password secret. Unsafe: sharing your password with a friend; posting your school and address. Do not reply; block the person and tell a parent or teacher.—