1969-04-19 — Page 13

REFERENCE LIBRAN

**** KANNUR BERASAICHE WAH KIU YAT PO

郭日僑華

英中會米高二地理科(廿四),劉玉權。

b) Canadian Prairie

Nheat Growing AREA

CANADA

"GEOGRAPHY)|(24)

16. The map of africa shows four olima.am

marked A, B, C, D. On the mapr-

State for each of the four stations on the

line protided

(1) the type of climate

(ii) the period or periode of maximum rainfall

over the year

(D) On the answer paper

(i) explain the distribuzion of rainfall

each of the statione.

(11) state briefly the difference between the

annual range of temperature at ▲ and D.

ZEN WHEAT

日九十月四年九六九

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九六九車中文学会者試題殖器

化學科

(廿四)

·林錫衡、

複習題二十四

Anm.(a)(1) A – equatorial œinate

18.

3- hot grassland (Savannah) climate

hot desert climate Mediterranean climate

D

(11) A = April and October

B-October to Karch

C March to October,

April to October

D

(b)(1) A There is rainfall all the year round

Rain is heavy and of convectional type, and falla in the afternoon when maximure heating promotes rising air currents. (convection). April and Ootsber are normally the wettest months, shortly after the equinoxea. Annual amount varią. from 50" to 80 but 100" is uncommon,

B-There are a definite dry and wet seasons, Throughout winter offshore south- cast Trades blow, hence there is xọ rain, In Bummer (October to March) when the convectional rain belt of the Doldrum moves into the Savannah latitude if brings convectional rain, The annual amount. #ranges from 10" in the desert margin to

60" in areas near the equator,

The region is under the influence of the off-shore trade winds which blow all the year round (North-east Trades in...... Northern Hemisphere), thus rainfall is infrequent and may not fall for years. The annual amount is less than 10" and usually comes in the form of sudden showers,

D- The area being affected by the geing of the pressure and wind belte, sain is brought by the north-westerly winds which blow in winter (October to March), Summer is the dry season (April to September) as at this time, the region lies in the Trade wind belt ive. southeast Trades which blos offshore.

(ii) In A, temperature is high and uniform"

throughout the year, around 80°F (26°C). because there is little variation in the length of day and night, and the high midday angle made by the sun in equatorial: latitude is never less than 661 - Thereföre the annual range of temperaturo in knall 1 rarely more than 2°C.

In D, temperatures in summer (Ootabar to March) are high because the cloudless skies.

combined with the absence of vegetation and low humidity cause températures to ris to more than 45 C. In the cool season (April to October) when the overhead su shines over the northern hemisphere, temperatures are about 20°C. Thus ite annual range is about 25°C, which an greater than that of A,

45. Choose two of the following crops whmat

maize, rice, For each of the two chosan (a) State the geographical conditions needed for

the growing of the crop.t

Ana

(b) Locate by means of a sketch map an important

exporting äres, marking and naming a port. (c) Name a country which imports a lot of the

orop.

(d) Examine the world trade of the commodity

Wheat

a) Geographical conditionas

Relief and drainage - It is best to ba grown on land which is well drained and flat enough for the use of machinery. Clinate

(1) Temperature - It needs a growing season of 90 days or more with a temperature of at least 60°F. The July isotherm of 60°F marks roughi, the extreme northern limit of the wheat belt. A bright sunny autumn for harvesting is also desirable.

(11) Rainfall It needs an annual rainfall of 15 to 35". Some of it must fall in the growing season in order to swall

the grain before resping.

Soil-

Moderate stiff loan or clayey soil

will be good for the crop e.g. the "black

Boils of the European Steppe and the

American Prairie.

4. Labour Not much Labour is needed as most

of the work is done by machinery.

o) China.

(d) In the world trade of this commodity,

Canada plays an important part. Each year

it produces more wheat than its small population can consume. Thus a large-

[quantity`ie exported making Canada the

greatest exporter. Countries from Southern -hemisphere such 48 Argentina and Australia also export wheat for the same reason. Two

eat for

former important exportera, Russia and U.S.a. now export much less because of their increas¬ ing industrial population,

From these exporters, wheat goes maanly to western Europe (Britain, France, Belgium, Jermany) which is another important producing region. They import wheat because of the dense populations and much of the land has been devoted to industrial use. Wheat also goes to China, India and Pakistan to feed their huge populations though they themselves are also producers.

Geographical conditions.

1. Relief - Rice is bast to be grown on low

and flat lands such as river deltas, alluvial plaids, so that the pady fielde can be flooded easily. Hill slope can be ased if they are carefully terraced

before narrow stretches of level land are obtained.

Climate.

(1) Temperature It needs a high summer

temperature with an average of 80°F throughout the growing period.

(11) Rainfall - An annual amount of at least

40 or its equivalent in irrigation. is necessary so that the pady fielda can be flooded during the early period of growth.

Soil Rice needs a permeable rich alluvial but the subsoil must be impermeable in order that water will not drain away readily,

Labour Much labour is needed, e.g. 70. transplant the weadlinge from the nursery bed to the flooded fields and to reap the crop. The method of cultivation resticts the use of machinery completely.

Xenam Basin of Thailand.

--KICE GROWING THREA OF THAILAND

d) The world trade of this commodity is almost

confined to South-east Asia which produces mare than 80% of the world's rice, Some of the producers like India, Pakistan, China, and Japan have to import rice from other producera because of their enormous home consumptions. Burua, Thailand, Cambodia and Vietnam have a surplus to export because they produce more than they need. In recent years rice from the U.S;A and Philippines also enter the import trade of Hong Kon

Questions for next weekı

46. Rubbar is an industrial crop grown for export

South-east Asia.

(a) Give the climate, soil, and economic

conditions necessary for its cultivation.

b) Locate by means of a sketch map an

important rubber-producing region and

print on it the chief port handling the export of the commodity.

(0) Desoride how the crop is collected and

prepared for export..

(d) State briefly the problems of the world

rubber trads.

47. (a) On a world map, show the major tea producing

areas and the major cocoa producing areas.

(b) Is it true to say that a good tea land is

1lso a good cocoa land? Give reasons to support your answer.

8

Name 1 country which produces significant quantities of both tea and cocoa,

1 country which produces significant quantities of cocoa but little or no tea, country which produces significant

quantities of tea but little or no coffee.

Distinguish between black tea and green tea.. How is chocolate made from onome fruita?

複習項目 電離離子反應 電解

工選擇題

(1)氯化鈉溶於水生成鈉離子與氯離子此作 用稲(4)電解(6)水解(4) 電離(4)分解(

(2)醋酸鈉溶液使石蕊試紙(e)變藍(b)變紅/

(C)雙紫(d)不變色

(3)酸式碳酸鈉溶液呈()酸性(b)鹼性(C)中性

(d)酸鹼性不足

(一)在下列數物中選取一種非電解質(4)硫酸

(b)酒精(C)氫氧化銨(d)氯化鎂

(5)溶液稀釋電離度 (2)減少()増加(木曜

(d)或增或減

當量的酪和一克雷量鹼作用後其溶 液(4)呈中性(b)呈酸性(三品 (d)酸鹼性 未能確定

?離酸溶液中含有(?)CH3COOH分子(H

CH2C00 ̄ ̄ (C) H* CH2 COD (d) H" CH2COO B CHCOOH

(8)氧化溶液中金有(4) NaCl 分子(b) Na CI (C) Nat & Cl (d) Nat, Cl B NaCl ( 1填-

題

小電解稀硫酸溶液在陽極可得.

痂 可得

漸少。 2)電解砧酔鉏溶液在陽極可得 可律 ,溶液的酸性漸

在陰極

在陰極

定律。

(3)電解硫酸銅溶液若在陰極得銅6.35克則 在陽極可得氧 升(MTP,乾燥論)若 電解時間五倍之則所得銅重為 ** 據的是:

正寓出下列二日

物之電離方程式

(/)碳酸氫鈉(Z)硫酸鉄

正寓出下列各物的水解式並決定其酸鹼性:

(1)硫酸銨 (2)碳酸鈉

丁寫出下列各物電解過程及結果:

(1)氯化鈉溶液(2)硫酸銅溶液(鉑極)

複習題二十三解答

工()盐基鹼酸酸塩類和水

(2)少陽大陰

降低增強降低

最活溌金属如卸

(2)次活潑金蛋如:

(3)次活潑金蛋如:鎂鋁鋅

(4)不活潑金蛋其活潑序在氫之下但非金

鉛二者如鉛銅永銀

(5)最不活澄金属郎 金鉐

鈣

(6)最活發金魚卸筋金

(BZ)

) 活潑金蛋其结合力强其化合物較安定不 易分解得單質態金蛋故要用熔融電解法 治鍊如:鉀鈉鈣鎂鍇

)不甚活潑的金蛋其結合力較弱其化合物 較不安足用碳,一氧化碳,氫等便能使其自 化合物中還原,如:鋅 鉄鉛銅

I (!) Zn + Cu50, → ZnSO, + Cub

硫酸銅溶液自藍色漸變淺色而有紅色的 銅積聚。因鋅較銅活潑,能自銅的化合物 中將銅置換出來:

(2) Cu + FeCl; → (###)

因銅不及铁活潑不能自鉄的化合物中置, 換鉄

(3) 2 Na + 2 H2O → Z NaOH + H2T

鈉在水面轉動起劇烈的作用,且伴有吱吱 聲及微微火光放出氫氣(點火有嗚爆聲 水變為鹼性之氫氧化鈉溶液。(投入石蕊 試紙可見試紙呈藍色。)

(4) Fe 0, + 3.CO→→ 2 Fe + SCO2 T

氧化碳使氧化鉄還原得金蛋鉄而生 氧化碳。不易覺察有何特殊現象,但若將 氣体通入澄清石灰水則可見反應前對石 灰水無作用,反應後則能使石灰水混濁,