1964-06-02 — Page 9

BITAMEREFT

香港英文中學會考訊 顆解答

th 理

(續)

GEOGRAPHY

(Continued from the last issue)

No 3.

SECTION B

(b) (i) Draw a long profile of a fully developed river and mark on

it the various courses (sometimes called stages or reaches)..

(ii) Taking the three main courses in turn draw a contour sketch map for each. Label the main physical features. Drav each contour map in a square measuring 3 inches by 3 inches. The scale of each map is to be I inch to I mile. Number your contour lines.

(No written answer is required).

With the aid of well labelled sketch maps and/or diagrams explain FOUR of the following:-

(a)

why the port of Murmansk in N. W. Russia is free from ice in the winter although it is within the Arctic Circle;

(b) why the region around the Mediterranean Sea receives most of its

annual rainfall in the winter months;

(c)

(d)

(A)

why lands in the equatorial zone are said to have no weather; only climate":

why the winds in the northern hemisphere are deflected to the right:14

why the average annual range of temperature at Lisbon is only 20o F7 1 while at Peking which is almost in the same latitude and at the same altitude, the average annual range is as great as 55° Fi

why the natural vegetation of the west facing slopes of the Coastal) Range of British Columbia is well developed coniferous forest.

Write short geographical notes on FOUR of the following:-

5.

the continental shelf; the Sargasso Sea; barrier reefs; the equatorial counter current continental islands; sea fogs around Hong Kong.

*Metres

1500

NO. 3.

(b)

Lustrate your answers with well labelled sketch maps and/or diagrams.

Pper

Long Profile

SOURCE

fully developed river.

·100

(lin to mile

Course

Tributary

期 The region around the red- iterranean Sea lies between 30 N. and 45 N., the region with trades blowing from inland in summer and westerly winds blowing onshore in winter. The change in direction of the winds is

due to the movement of the planetary wind system toward a the north in summer and the Bouth in winter. The diagrasp on the right shows how this' migration of the wind system occurs. As the westerly -winds come the sea, they bring winter rain to the Mediterran eun Landa; as the trades come from the land, they are"dry winds, and bring no rain in summer:

(c)" in the equatorial zone from? 10°N. to 10's. there is only one season in the year,i,e,,~ hot and wet season only. Ther is practically no annual range of temperature, and the rainfall is very heavy and evenly distributed in

日二月六年四六九一股公年三十五國民素中

لہ ساتھی

EUROPE

1.

Northern Hemisphere

འ

Summer

M

MED. LAND

Northern Hemisphere".

Winter

Wet westerlies

The year. (Average temp. 80°F. Dry trades.

and annual rainfall 80 inches., The diagram on the right shows That the equatorial zone lice on the Doldrums (low pressure regions) all the year.

Although

the Doldrums may move to the north or south during the year. they are still within the* Cquatorial zone. That is

the cause for the heavy Equatorial

Doldrums Doldrums 21 Equianser Doldrums

Verli al

Jayne ins

Summer

Zone

Winie.

Convectional rain which may fall every afternoon kit 2.00 p.m.

The vertical tun 19 always very near this

one so that the temperatures vary little The "weather" of any one day is

the Bame ag that

ut any other day of the year.

The term weather is defined

the aviations of the conditions

of Lemperature, rainfall, etc. from the average cunnitions. Since there is na deviation, there is no weather, bul climate (hot and wet).

Metves

1500

S

1400

1301

12:00

4400

(d) The winds in the northern hemisphere are deflected towards the right, because every moving thing on the surface of the earth must obey Ferrel's Law, which states that every moving thing on the earth tends to be deflected towards the right in the north- ern hemisphere and towards the

eft in the southern hemisphere. This is the result of the rotation of the earth.

(e) The temperatures of a place are affected by ocean currents/ and the direction of the wind, besides latitude and altitude. Lisbon lies within the gulf of winter warmth in Europe The

2ms North Atlantic. Drift together with the onshore westerly winds helps to raise

winter temperature, which verages to 50 P. Peking i8 situated on the east margin of the continent of Asia, which) 18 very cold in winter. The high pressure over Siberia causes winter monsoon blowing off-shore at Peking. This cold). north-westerly wind lowers the winte temperature thus the averag

Alth

Confluence

in Ba

100 metres)

(f) the

wind

rain

ies

rai

to

"Bui

NO

for winter is only 15 FY lower than that at Lisbon

ugh the summer temperatures:

se two places are about the the annual ranges of ratures vary greatly.

Ish Columbia lies 10 tish Type of Climatial

receives westerly

all the verge Midnating

-westerly winds

Rotation of

EUROPE,

Minds

this region. The coastal geof itish Columbia the windward side of the Rockies so heavy relief pitated on the mountain slopes, giving rise,

s forest, which is the kind of vegetation for this latitude (50 N.)

ital Shelf!

a contine

OT

the the sea

"Equalan

Vertical Sun

on Dec

nental shelf is a shallow part of the sea surrounding]

It is not deeper than 600 feet. Long ago, part nent submerged below the sea level, or part of

as pushed up near the sea level, forming the lf As such a shelf is not very deep, the

of human beings are accumulated there for marine life. The sea on top of a con- is a good fishing ground Wide continente

around the British Isles and off the coast

Continent

Continental

Shelf

Sea level

1600%