1969-03-29 — Page 15

MASTE

REFERENCE LIBRARY

29 MAR 1969

★敦伊藥頁三笨張四第日二十月二年酉己曆

文中

地理科

(二十一)

劉玉領

1969 中學會考試題預習

WAH KIU YAT PO報日僑

CITY HALL 六期星日九廿月三年九六九一公年八十五國民華中

oral force of a wave surging into the cave below, At the base of ana cliffs, wave action has

enlarged natural lines of weakness producing seaj caves, with prolonged wave action, a

cyclindrical tunnel is extended further into

the cliffs along a well-marked joint or fault

which leads vertically up to the land surface

Formation of à Tombolo

55#2%1J5%$#$18#%$%$#37%AD# 39$#355##2#3#3#<SAVAS PLANTAS (55) S

#

GEOGRAPHY (21)

Compare fiords and ria n.

How does the sea help to modify the coastline? Name a coastal feature caused by sem erosion and "anot her caused by sea deposition,

For each, explain how it has been formed.

Ann.(2) A ria is a funnel-shaped coastal indentation formed by submergence, affecting an area where hills and river valleys meet the coast at right) angles. It decreases in width and depth as it runs inland, The stream which flows into the head is responsible for eroding the original valley.

A fiord is a long narrow arm of the sea formd by the submergence of a deep glacial valley, with steep walls, deep water virtually to its head, numerous rectilinear branches, and a shallow threshold near its mouth. Therafora, a fiord and a ria differ in their. moda of formation, appearance, as well as utilisation, A fiord has been affected by glacial erosion and a ria, by fluvial erosion. A fiord is fringed by steep walls and is shallower at its seaward end than its landward | end whereas a ria has gently sloping sides and it becomes progressively deeper seawards. Consequent to the above, though both provide sheltered harbourage for ships, a ria offers better possibilities for agriculture and port development since its hintarland readily lenda itself to farming communication inland is easier.

A Ria

Sea

deeper than

ighland

I is shallower than Y

ghland

(b) The sea modifies the line where land and water meet. Its work is threefold, consisting of erosion, transport and deposition,

It erodes by corrasion, hydraulic forge, and attrition, The water initially attacks lines weakness in the rock face, such as joints and bedding planes, trapa and a

gapa and fissures auddenly. Men the retreats, the air expands. This causes the rocks to shatter and

Moreover, the fragments, besides

about by the wayes and broke

1.

Tombolo

(按基四张第二篇)

一九六九丰灾中学考試題預習

depositB

化學科 (二十一)

Formation of a Blowhole

A sea cave develops

BLOWHOLE

Cliff wide cave' (hard

entrance rock)

39.(a) with reference to the weather chart which is

provided, answer the following:

(1) Describe the pressare distribution over the

area.

(11) Give the details of the weather in Hong Kong

as shown on the chart;

(111) In which period of the year is this pressure

pattern most likely to be found?

(b) With the approach of a typhoon towards Hong Kong,

what changes in weather would occur? :

Ans.(a) (1) A tropical cyclone is centred over the sea

to the east of Luzon. A temperate cyclons develops in the Yellow Sea, from which a cold front extends southwestwards across east and south China, and a warm front stretches southeastwards towards southern Kyushu, Pressure is high over the interior part of China, A small high occurs to the immediate north-west of Hong Kong,

satio

HIGH

finer particles (this is termed att used as Weapons with which to attad This process of mechanical eros transported by waves is known as Cortssion.

As a wave breaker (the swash) sweeps materials obliquely up to the beach, and the backwash draga some of it down again at right angles to the shoreline, there is a net movement of rock waste along the beach. Such a gradual movement. which is known as the longshore drift represent s the work of ses transport. As transporting ceases, deposition sets in, usually in shallow water or at the head of bays where the approaching waves ̈have lost their erosive power.

oblique swash

LAN D

(11) In Hong Kong, the winds come from the east- south-east at a speed of 5 knots. Baronstri reading is high, nearing 1010 millibars,

The temperature is 270. The weather is fina and no precipitation has been recorded. 111) This pattern is most likely to be found in

late summer, between September and Catcher,

In Hong Kong, the typhoona usually com from the/ | southeast. Before a typhoon arrives, the temperature and humidity are high but the presure drops. The weather at this stage 10- fine but soon the sky becomes beavily OVIPOLIE and rain falls. Winds rush in from the northeast at rapidly increasing speeds. When the typhoon arrives the pressure drops quickly and dense clouds are formed, modo panied by torrential rain.. The winds become very violent and often reach 150 miles per hour, later, if the eye of the typhoon passes our the area, calm

conditions return. Shortly afterwards, usually

in an hour's time, gusty winds, dense clouds. and heavy rain resume control. The winds now blow from the south-west. Gradually, as the typhoon moves further and further away, the wide become weakened and the clouds and ra begin to vanish.

HIGH

retreating backwash

∙1012

LOW

allow Sea

„Kórea

East China Sea

1010

液褪色溶於水後加硝酸鋇溶液生白 色沉澱但再加薑酸則沉澱會消失。

豆試以簡單化學方法錯別下列各组合

附有関方程式

(1)碳酸鈉

碳酸氫鈉

(2)氯化鈉

溴化鈉碘化鈉

(3)硫化鎂、硫酸鎂、亞硫酸鎂

(4)硝酸鈉、亞硝酸鈉

()硫酸、盐酸、硝酸

複習題二十解答

工解設碳酸鹽當量為X

碳酸鹽之克當量数, 薑酸之克當量数、

氧氧化動之克富量:

14 215 × = 501

CO之當量為 2 = 30

金蛋當量 50-30=20

金蛋原子量=原子價,當量)

IL 11.555 Na2 CQ XH2O Z ★ ĕ ★.

Z(106+187) 碗酸濃度:3.92

20

2X

N = 0.08 NI

依題意得湯(台款)=0.08.0

#4213

此滴定是強酸滴定弱鹼性菫應用甲 基橙為指示劑、

血解,設有純氫氧化鉀不克

氫氧化鉀克當量数:希

解:

250

氧氧化卻様品純度1001,100%

92.3%

110 € 4 + (CH3COOH) X X

CHY COOH克當量数,

2.8

12=0.588

104/13/cc! 10 ce2 = 10 FEL

醋中金醋酸, 0.5882 00% = 5·88%

Longshore drift

'tombolo is a depositional feature, It is a bar sand or shingle, linking an island with the mainland or connecting two islands. Coastal currents pick up land-derived deposits in the shallow waters of the foreshore and transport then farther along the shore. These wasta will/ then be re-deposited as they reach the deeper, and quieter water. In tim, as more material is added, it will pile up until it become apit The spit grows out from one island, but ultimately stretches across the parrow stretchy of water to the opposite island. A tombole has thus been formed.

A blowhole is an erosional feature at the coast. It is a near vertical cleft linking a sea-osve with the surface inland of the cliff-edge; spray is sometimes thrown out of the hole by compressi

Kong

(South China Sea.

Kani

Questions for next.. week i

40. A westner station contains the following instrument s maximin and minimim theomometer, anemometer and wind.

vane, and radiozonde. For each of themi (a) describe its appearance

(b) explain how it is used to obtain weather rac

rds,

41. (a) With the aid of diagrams, explain the rarit 200

of (1) relief rain, (ii) radiation fog and (111) thunderstorm.

(b) Name (1) a region in temperate latitude where

rain falls all the year round

¡(ii) a region where rain falls from June

to September

(iii) a region where rain rarely falls

(iv) a region where rain falls in winter Write brief explanatory notes on each,

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