1969-03-08 — Page 14

質二第張四日十二月正年己夏 WAH KIU YAT PO

報日橋

六期星5日八月三年九六九一曆公年八十五國民華中 育教備華 TM

1969 文中學會考試題預習

(一九六九車中文中学会考試題預裝

地理科

(十八) 劉玉領

MAIN STREA

化學科

(十八) ̇林錫衡 複習題十八

GEOGRAPHY (18)

32. How is granite formed? Describe the features caused

Ans

by denudation in granite areas of Hong Kong.

In the Barysphere, the molten rocks produce gas which in turn. produces vapour pressure. When

che vapour. pressure is high, the molten rocks cend to riše, leaving the Barysphere. The next layer to which they go is the Lithosphere which is quite a thick layer, when a large amount of aga 2s trapped in the Sima, a magna reservoir is formed, As the magma is still active, the reservoir cannot retain it long and it goes through lines of weakness into the sial where magma cools and crystallizes to form intrusive igneous rocks. Granite is an example of plutonic rock, which is the lower layer of intrusive rocks. It is formed when aga solidifies deep below the ground. surface;

STRUCTURE OF "THE EARTH

WEAVE

SIAL

BARYSHPERE

•ROCK.

BAKISH ZRE

LITHOSPHERE

1 IRON & NICKEL CORE

Y STAL (LIGHT. ÍGNEOUS ROCAL)

2 SIMA (Heavy fantous Racks).

3. VERY HEAVY IGNEOUS ROCKS) 1 FDROS PHERE COCEAN

FORMATION OF GRANITE

YOLCANIC EXTRUSIVE

COUNTRY ROCK.

- PLUTONIC eg. GRANITE

Among the various kinda s of igneous rocks found in Hong Kong, granite is comparatively less resistant, as a result of denudation, the following features are formed ; -

The grantic harbour

The Victor fa harbour area was. composed of granite overlaid by a layer of volcanic rock. It is delieved that there was a river draining, through the area from west to east. Thus a river valley Waa carved. in this area, Later, a result of eustatic change (change of sea level): the eroded part was drowned, forming the present Harbour while the more resistant volcanic rocks give rise to the formation of higher peaks on both sides of the harbour;

A CROSS-SECTION ACROSS THE VICTORIA HARBOUR.

BUFFALO

VICTORIA

VICTORIA HARBOUR

WLOON

Describe the formation of fold mountains,

illustrating your answer with well labelled diagrams.

What:ts. meant by old fold mountains and young

fold mountains Give the ain difference between them and explain why.

In what ways are fold mountains advantageous to Han?

Fold mountains origirate in a shallow sea Ageosync line, which lies between two continental blocks. In this trougn, sediments resulted from. wearing down of the earth's surface by various agents are deposited, Layers of sedimentary rocks are then formed at the sea bottom.j Compressional: forces acting Laterally below tha 'earth's 'surface cause the sea ded to subside:

and Layers of f sedimentary rocks are compressed: from sideways to form wrinkles, or folds. The "process of folding makes the sedimentary rockis

zone to decrease and its thickness to increase.. Eventually when these geosynclinal sediments are folded out above sea level, they form fold mountains.

FORMATION OF TOLD MOUNTAINS"

WEARING DAWN OF THE

CARTH'S SURFACE

BY YARIOUS

AOINTS

S

"SHALLOW BRA (GROSYNCLIN)

CONTIMENTAL

LATERAL COMPRESzIONAL) FORCES. DOWN WARD

BENEATH SUBSIDES:

THE SEA

COMPA BETONAL

ROCKS TO BECOME

A REDUCED

BLOCK

CAUSE GENNENTARY

FORCES

FOLDER

UNTAINS

複習項目普通鹼類碳酸鈉碳酸氫鈉

工填-

题

(I) 鹼類的溶液一般都有。

使石蕊試紙呈

(2)三種重要的鹼類是

感浴

色

(4)

3) 氫氧化鈉露置空氣中極易

空氣中的 1.成碳酸鈉. 製造氫氧化鈉可用

並吸收!

色此為檢驗

法 (5)氫氧化鈉加入銨楹中產生

使石蕊試紙呈 法。

(6)氫氧化鈉溶液與氯化铁溶液混合生

色沉澱此沉澱為 之法。

此為檢驗

電解食鹽溶液在陽極生

氣而溶液則成

氣在陰極

溶液。

類碳

(8)氫氧化鈉蛋、 類碳酸鈉蛋,

酸氫鈉蛋

類

(9)氫氧化鈉俗稱

碳酸氫鈉俗稱 稱

(10)肥皂是

磯酸俗

硫代硫酸钠俗

酸的

蓝軟肥皂則為_

(11)碳酸鈉與碳酸氫鈉加稀鹽酸皆生

氣但若脟碳酸鈉與碳酸氫鈉分别加熱 則只有 生成此氣体

(12)欲檢驗一般碳酸捨與碳酸氫塩的溶液 可分別加入 溶液則二者中只有这

色沉澱此沉澱為

塩產

(13)碳酸鈉溶液使酚酞呈

使酚酞呈

色故鹼性以

(4)碳酸氫鈉的用途如下

(a)可以滅火,因為

(6)可以製汽水因為

(C)可以中和胃酸因為

(2)可為熔粉因為

ᄑ完成並平衡下列方程式

(1) Na2 CO2+ Ca(OH)

(2) NaCl + H20

(3) NaOH + HCl

电鮮

(4) NaOH + Fells

(5) NGOH + NH4Cl→

色碳酸氫鈉

(6) ( (17H35 (00), C3HS + NaOH →

(T) NaHCO3

((8) ~ Na2 CO2 + Mg (NO3) →

{(9) Na2 CO3 + Cason

((10) NaHCO3 + HCl → III寓出下列各物的化學式

(1)洗濯蘇打

(2)霖打灰

((3)燒碱

(4)酸式碳酸鈉

立解釋下列名詞 (1)皂化作用

蝦。

(2)鹽析法

VOLCANIC

Round topped hills

GRANITE

As granite is comperatively less resistant. Therefore it is more easily eroded than volcanic rocks in Hong Kong, forming the lower hills with round tops and less steep slopes.

Gullies and bad lands

A gully is a long narrow channel worn out by the action of water on the hillside. It is formed when rain water runs down the hillslope in granitic areas and subsequently removes the veathered and loose rock minerals, fan. extensive area of granitic rock is seriously eroded, numerous gullies are formed. The sw face vegetation ay be completely removed and the land becomes barren and covered only with coarse sand: particles. This is known as badland. e.g Castle Peak area and Golden Hill area.

Rectangular drainage system

Due to the arrangement of joints in the rocks, water flows in them forming a rectangulari drainage pattern. e.g. Tai lam Chung area.

·RECTANGULAR PRINNAGE PATTERN

APPROACHING CONTINENTAL BLOCKS INTENSELY. FOLD THE GEOSYN CUINAL LEDIMENTS

WACH

FORCED OUT ONTO THE FIGA OF THE

BLOCKS, TUR. FOLDE WACH HOYA BKAN RUSED |

HIGH FORM POW MOUNTAINS

wld fold mountains are fold mountains formed in; the Caledonian Period, del about 330 million years ago. Young folo mountains are those formea in the Alpine Feriod 1.e. about 40 million years ago. In other words, as their names impuy, old folomoritains nave come into existence for

ionger time.

The ain difference between them is that old fold mountains are lower than young fold mountains. Since old fold mountains came into existence long before young fold mountains, they have been subjected to the actions of various agents of weathering and erosion for a much

longer time. Therefore they are lower than young fold mountains.

Fold mountains can be advantageous to an in following ways:-

(d) Rivers flowing down the mountain can be

used for irrigation or h.Bir. 9.8. River

·Colorado, Columbia rivers in Japan.

(永元釋人第四張第二頁)

豆肥皂何以能去污,硬水對之有何影响: 試述蘇尔未法製碳酸鈉之备步反應。未 各步副產品可如何重覆使用。

複習題十七解答

I. (1) 2 (az (PO4)2 + 6 SiO, →6 (asi D3 + P4010

(2):10 C + P4010.

→ Pat+ 10. com.

(3)2P+ SHNO42H20→3H3PO4+ 5NO↑

(4) 2P + 5. H2 504 → 2 Hz POq+ 5 NOT

黄磷

紅磷 較高 可溶於 CS.等不溶於C5.等)

甚低

熔點

溶解性

着火點 化學性 毒性

活潑!

劇毒

較高

不活潑 無毒

(更正) 複習題十五五(1)之答案應為(油)硫) (化鋅家讀者指正并此致謝?