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CBSE · Class 11 · Social Science

World Climate and Climate Change

Standard difficulty · 20 questions · 40 marks · Time: 37 minutes

Name: Date: Score: ____ / 40

Write full answers in Sections B and C. Answers are on the last page — try every question first!

Section A — Choose the correct answer8 × 1 = 8 marks
1.
The most widely used classification of climate was developed by:
  1. Ferrel
  2. Mercalli
  3. Hadley
  4. Koeppen
2.
Which climate type is coded BSh?
  1. subtropical steppe
  2. cold climate with dry winters
  3. polar ice cap
  4. cold climate with humid winters
3.
Where is the polar ice cap (EF) climate found?
  1. northwestern Europe and southern Chile
  2. the Indian subcontinent and northern Australia
  3. the north Indian plains and south China interior plains
  4. interior Greenland and Antarctica
4.
In Koeppen’s codes, what does “f” stand for?
  1. winter dry season
  2. summer dry season
  3. monsoon climate
  4. no dry season
5.
A humid place has a coldest month of −27 °C and a warmest month of 18 °C. In which Koeppen group is it?
  1. D (cold snow forest)
  2. E (cold)
  3. A (tropical)
  4. C (warm temperate)
6.
A place has a coldest month of −18 °C and a warmest month of 3 °C. What is its annual range of temperature?
  1. 23 °C
  2. 15 °C
  3. 31 °C
  4. 21 °C
7.
The Little Ice Age began in Europe in 1550; the Sahel drought began in 1967. How many years apart were these?
  1. 417 years
  2. 414 years
  3. 418 years
  4. 427 years
8.
Carbon dioxide is rising about 0.5 per cent a year. Suppose a concentration of 200 parts per million rose by 0.5 per cent of that amount every year. By how many parts per million would it rise in 6 years?
  1. 60 ppm
  2. 1 ppm
  3. 7 ppm
  4. 6 ppm
Section B — Short answer8 × 2 = 16 marks
9.
Name the three approaches to classifying climate.
10.
Name the climate type for each Koeppen code: (a) BSk (b) Cs
11.
Where is each climate found? (a) humid subtropical with dry winter (Cwa) (b) tropical wet (Af)
12.
What does each letter stand for in Koeppen’s codes: (a) s (b) S
13.
Give the Koeppen group letter (A, C, D or E) for each humid place: (a) coldest −1 °C, warmest 7 °C (b) coldest −34 °C, warmest −4 °C
14.
Which came first, and by how many years? (a) the warmest year of the century was recorded (1998) (b) the Sahel drought began (1967)
15.
Find the annual range of temperature: (a) coldest month −29 °C, warmest −8 °C (b) coldest month −14 °C, warmest 21 °C. Why are ranges small in tropical climates?
16.
Suppose carbon dioxide stands at 400 ppm and rises by 0.5 per cent of that amount each year. How much higher would it be after 50 years? Name two sinks for carbon dioxide.
Section C — Longer answers4 × 4 = 16 marks
17.
Explain Koeppen’s scheme of climate classification.
18.
Three humid places have these coldest and warmest monthly means: (a) 27 °C and 29 °C (b) −1 °C and 31 °C (c) −36 °C and −16 °C. (i) Give each its Koeppen group. (ii) Find each annual range. (iii) Which group is based on precipitation instead?
19.
(a) Put these in order, earliest first: the Little Ice Age ended (1850); the Little Ice Age began in Europe (1550); Koeppen developed his scheme (1918). (b) How many years from the first to the last? (c) Give one natural cause of climate change.
20.
Describe where each climate is found and one feature of it: (a) cold climate with dry winters (Dw) (b) humid subtropical with dry winter (Cwa)
AmbifulWorksheets
Practice that never repeats
CBSE · Class 11 · Social Science

Answer key

World Climate and Climate Change · AW-11SS-GWC-2026-V1 · For parents — fold back or tear off before handing the sheet to your child.

QAnswerWorking
1(d) Koeppen—
2(a) subtropical steppe—
3(d) interior Greenland and Antarctica—
4(d) no dry season—
5(a) D (cold snow forest)A: coldest month 18 °C or more; C: coldest between −3 °C and 18 °C; D: coldest −3 °C or below; E: every month below 10 °C
6(d) 21 °C3 − (−18)
7(a) 417 years1967 − 1550 = 417
8(d) 6 ppm0.5% of 200 = 1; × 6
9Empirical, genetic and applied.—
10(a) mid-latitude steppe (b) Mediterranean—
11(a) the north Indian plains and south China interior plains (b) the Amazon Basin and western equatorial Africa—
12(a) summer dry season (b) steppe or semi-arid—
13(a) E (b) EA: coldest month 18 °C or more; C: coldest between −3 °C and 18 °C; D: coldest −3 °C or below; E: every month below 10 °C
14The Sahel drought began, by 31 years1998 − 1967
15(a) 21 °C (b) 35 °C; the sun is high all year, so temperatures stay uniformly high.warmest − coldest
16100 ppm higher; forests and oceans0.5% of 400 = 2; × 50
17An empirical scheme relating vegetation to temperature and precipitation; five groups (A, B, C, D, E) by capital letters, with small letters for seasonality and severity.—
18(i) (a) A (tropical) (b) C (warm temperate) (c) E (cold) (ii) (a) 2 °C (b) 32 °C (c) 20 °C (iii) B, the dry climatesA: coldest month 18 °C or more; C: coldest between −3 °C and 18 °C; D: coldest −3 °C or below; E: every month below 10 °C
19(a) the Little Ice Age began in Europe; the Little Ice Age ended; Koeppen developed his scheme (b) 368 years (c) Answers will vary; see the chapter.—
20(a) north-eastern Asia (b) the north Indian plains and south China interior plains—