約鬱藥
日八十日
1963英文中學會考試題預習專欄
地理科(二十)
劉玉饃,
Geography (20)
33. (a) How does ics erode the land surfacer
(b) Describe the formation of any three of the
common characteristic features in a glaciate upland region.
e) In what ways can a glaciated region be ofị
value to man?
There are two main processes of glacia. erosion: plucking and abrasion. Plucking refers to the pulling away of masses of rock on the valley floor or sides of a glacier, by means of ice freezing on to protuberances and detaching them as it moves on. Plucking is particularly marked in the case of well Jointed racks. As a glacier moves along,
pieces of rock broken off the valley sides fall on to the glacier and become embedded in it. These function as an abrasive medium leading to the mechanical wearing-down of rocks that are in their way. This process of wearing away is termed abrasion,
The three common characteristic feature: in a glaciated upland region are: cirque, arete, hanging valley.
Cirques are steep-sided semi-circular basins of glacial origin high up on mountain slopes. They appear to have acted as collecting grounds for the ice which flow down the slopes į as valley glaciers. A shallow preglacial hollow has been progressivaly enlarged, first by alternate thaw-freeze of a snow-patch within 1, which causes the rocks to disintegrate. Freeze-thaw eats both into the back-wall of the oirque, thus maintaining its steepness, and also into the floor, thus maintaining and emphasizing its basin shape. It also provides debris which freezes into the base of the ice and so acts as an abrasive. It is a common feature in glaciated mountain ranges, often containing a small lake (a tarn).
An arete is a steep-sided rocky ridge, specifying the crest between two adjacent cirques. It is formed by two corries eating backwards from the opposite sides of a mountain...
Cirque & Arere
Belone" -Glaciation Shallow DEPRESSION
After Gracation
•ARE TE
A hanging valley is a high-lying tributary valley which leads with a marked steepening of slope into a min valley. The stream of this valley joins the main river via a waterfall. There are two entirely different explanations as to its origin. Ühe' group attributes this to the unequal
CITY HALL
報
日
pasture for cattle so that transhumance is
practised in mountainous countries as Norway.
and Switzerland, Lastly, glaciated mountain
regions attract tourists and offer good skiing
grounds in winter. Pourism can be promoted in / these regions.
34. Name two features produced by wind erosion and one]
produced by wind deposition which frequently
oocur in tropical deserts, for each, describa:; (a) its appearance, and (b) its formation. Iliustrate your answer with diagrams.
Kock pedestals and yardangs are produced by wind erosion whereas sand dunes are depositiona) features formed by the same agent.
wind carries a load of dust and sand particles as
it travels. Thus armed, it is able to abrade and polish any obstacle with which it
comes in contact. Wind abrasion is greatest. near to ground level and hard rock is worn away more slowly. Under the orolonged attack of wind abrasion, some rock masses, composed of alternate! layers of hard and soft rock, are sculptured
into fantastic shapes according to the differencss]
in the stroneth of the rock and the strength of the winds. These are called rock pedestals.
Rock Code
Hard Rock
日六十月三年八六九一公年七十五國民中
會生舊學大港香
舞餐年周
加參會蒞士辭趾麟
N-54.
昨由監林振聲號
捐與基敎齾院
〔特鎭)會變班分行代與人格。
教育問題座談會演講
安德遜博士在聯合書院學生
教育與人格問題
根底會工作學無影响點將影展、
「與人掐」。」
獎學金額計名
F
1
AT
口腆
予管備
波診助
試題蓣習書酒釀
(-D)
複習題二十
化學科
複習項目
~
湿蒸解釋
Yardinge are marp crests of idee, of roc separated from their parallel ngigpours by shallow groves. The area exhibit a ridge and furrow landscape. They are the revolt of
ifferential erosion in a desert by the scouring effect of sand-lader winds. In an arsa under by bands of herd and soft rocks which lis pr to the prevailing winds, wind abrasion turns belts of soft rocks into troughs whilst the mard rocks are undercut and they stand up as narrow, ridges called yardangs.
rough
Yording
Direction of He,
prevailing
„JEZÝFROCK
Hard Rock.
Winds
HONG KO
excavation by a major glacier a more shallow, and therefore less effective tributary glacier. Consequent to this, the main valley is overdeepened whereas the tributary valley receives little deepening and remains highly perched above the main valley, other group holds that most of the deepening must be
fluvial and that it has occurred during inter- glacial periods. They suggest that in a period of ice-retreat, the main valley was unoccupied by ice whilst the higher parts of the tributary valleys still carried an ice cover and could not be eroded by water. These tributary valleys therefore remained ungraded while the ma in valley was undergoing active erosion,
under up by
WILL ALTINIQU
林錫衡•
本項無一定範例題亦不勝舉,大致 有三類 (一)日常生活所見現象,(二)
(見現象. (三)特殊化學作用。
本中曾提及有些則要憑一般化學 有些 去推想其理由. 由有條理地敍這外儘可能附以有關的 答題時除了把理
方程式)
解釋下列日現象
# (1) 鉄器會生銹生銹後重量增加 (2)新聞紙在日光下久晒變黃
3)腊燭燃燒常有但木炭燃燒則常
無火熘
(4)煤氣有毒但燃燒後無毒
(5)硬水不適用於肥皂又會便汽鍋生坵
* 解釋下列實驗現象
(1)銅鹽溶液加氨水初生淺藍色沉澱氨 藍色溶液 水過多則沉澱溶解而成 乙硫化氫之水溶液久置表面生黄色的,
薄膜
MBARIES:
A sand dune is a low ridge or hillock of irifted sand, mainly moved and deposited by wind. It is made of sand which has bean piled up against a lump of rock or any other form of obstruation. Once started, the dune itself causes a greater accumulation of sand until the dunes may be several hundred feat high. Sand dunes are not usually stationary. Sand is being constantly blown from the gentle slope of the windward sto and dropped on the steep leeward side. So the dune moves steadily forward. As the ends dune are lower than the centre they love more quickly. This results in the
the crescent-pai berenang,
A
rmation of
(3)鋅與稀硫酸作用生氫與濃硫酸作用 則生 氧化硫 銅與濃硫酸能起作 用,而與稀硫酸則無作用。
(4)通二氧
物通過量
灰水初生白色混濁 澄清.
(2)鈉要貯油
黃磷要貯水
(6)滴濃硝酸
Hanging vorrey
Before Glocution
After Glaciation'
Tributor
River valley
River
volley - Side watertali
c) A glaciated region can be of value to man in! may different weye, Firstly, boulder clay deposits are sometimes very fertile, 0.8. East Anglia in Great Britain and parts of the Diary Eelt and Wheat Belt of North America. The siegree of fertility depends largely on the source of origin or the glacial drift. Secondly, old glacial lako beds are invariably fertile. Extensive areas of the Canadien Prairies owe their prosperity to the rich alluviums which once collected on the floors of glacial lakes. Thirdly waterfalls resulting from glaciation can be harnessed for the generation of hydro- electric power. Fourthly, come glacial lakes, such as the Great Lakes of North America, help to regulate the flow of streams and are of real value as natural routeways. Pifthly, many glaciated valleys have benches high up on their aidas which gravida oood sy
wind
şimd
wind
sand brownuing divie on the suitors
↑ Rost forming states
مات پر ساری رات کو
Sand is piled up pebinë vite nut and a prie of sand of sand dunen formed
Questions for next week:!
wont shaypers
the evigra sue
35. (a) Locate the rift valleys or East Afrios on
sketch map. (b) Suggest a mode of formation for it. (a) In what ways does the appearance of a rift valley differ from that of a river valley?
36. Write an account on the work of underground water,
in a limestone region, making special reference to the development of the characteristic physica features found therein,
37. Point out briefly the differences between;
(a) a fiord and a ria
(b) a dendritic drainage pattem and a trellised)
drainage pattern.
色氣体.
氧化硫之瓶中,生紅棕
(2)硫化氫與二氧化硫皆令高錳酸鉀溶 液退色但前者所得溶液混濁後者所; 得溶液澄清.
(8)氯化銨加熱分解,石蕊試紙分置其上 下在其上的會呈藍色在其下的龠呈 紅色
III氯與二氧化硫之漂白作用有何不同
何以鉀活發於鈉而羸活潑於氣,
立石膏何以能用以塑造?
黑碳酸鈉何以能软化暫時及永久水? 複習題十九解答
H
B 是
氧化碳CO2
A 可能是碳酸氢盐或碳酸鹽,但因只 有碳酸鹽溶液加硝酸鎂溶液才會生 白色沉澱 (C是碳酸鎂MgC03)故可 確定A是碳酸鹽.
I氫氯化铁Fe(OH):
硫氰化铁Fe(CNS)3 原物為氯化铁FeCl3:
III
C是氨氣 NMS
B是二氧化氮NOL
A昊硝酸銨NH4NOS
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