1977-12-10 — Page 27

日十月二十年七七九一公年六十六國民華中

Describe and explain the .

changes represented by it,

Karamei

Blood

A

...Yaman

Pohai

glucose level

Tsaidam

育教僑華頁三第張七第二日十三月十年巳丁圈夏

育教僑華

1978

【中學會考試題預習專欄

明德社主播

地理

(+) 李婉儀

WAH KIU YAT PO

報日僑華

六期星

6) Lasy communication

to its lowest point and the rain may stop but the temp- erature would get higher, Since the area of her eye was small, the period of calm would be quite short. As her eye passed, the pressure would begin to rise, the wind would become stronger again and the winus direction would change. to south and south-west, "Thunderstorm would occur: again with groat intensity, Temper- uture began to drop and weather became cooler. Itu the passage of une vortes, the winds would rise and tue cluuus would arsappear..

BO

Rubber is expert oriented

an easy communication net- work is desirable.

The west- ern foothills of W. Malayais are well above the flood, low- land. Main roads und railways have been constructed along these drier areas to link up the great seaportà such as Singapore and Fort Swettenham to facilitate export.

Oilfields

Ars:

intake of sugar

Time"

y: injection of insulin

blood level of

normal people

GEOGRAPHY (10)

Suggested answers to quest-

ions 16 & 17:

xplanation of Symbols:

Typhoon Carmen is een-

tered near Hong Kong with the lowest pressure 900 mb at its eye. ressure incre: ses rapidly to the Nand, NY,

The highest pressure is found in the northwestern part, about 1000 mb, Pressure gradient is smaller in the N, E & SH. In the NE over 3. Chiun Sea

to the S of Japan, a temp- erate depression is develooped.

Formation of the Typhoon

is many other tronical cyclones which affeet Hong Kong, Typhoon Carmen was most probably formed over the North Pacific Ocean to the east of the Philippines. It is a piece of ocean between about 10 and 20 nerth and south of the equator where air masses brought by the northerly and southerly trade winds frequently meet. The

lower layers of there air mosses are warm and moist Bince they have travelled over the oceans, when the two air masses meet, one of them will rise against the other low pressure centre is "forried. As the air rises up, cooling takes place and latent heat relacased. It is the latent heat which supplies the energy for the cyclone to rotate and move nrthwestwards across the

cean towards the continents

Typhoon Signal

Typhoon signal No. 3, which shows that streng wind. at mean wind speed 22 - 23 knots, is expected. It is because, from the weather chart, we can see that Typhoon Carmen was apuroaching Hang Jung at a speed of about 30 knots when the data were taken into record.

Weather Forecasting

Un these few days, the weather of long long was affected by the typhoon. Before it arrived, the air was still, and temperature and humidity were high, the typhoou came nearer the sky would be gradually covered with clouds, air pressure. would begin to falt The

19

winds would be north westerly or north easterly and the strength of the wind ‚would increase. There would be heavy rainfall accompanied by thunder and Tightning. If Carmen veut un moving towarde the continent, her eye would pass directly over fong Kong, there would be a period of calm.ir pressure would drop

Hot and calm.

Dense clouds

Vistent winds

Very rough

Catin.

Vortex-Zvé

(6 to 32 km

to to iba km

rense clauds

Very rough

Varted

32' to 64 km j

Á SECTION THROUGH A TROPICAL CYCLONE"

Hot and cab..

high humistity

Los swell Sen

Grusty winds

high humidity:

Sea Low shell.

---

上

મા

favourable conditions for rubber plantation in d. latay

518

Temperature and Hainre

Malaysia 18 located within tue Doitrine. The⠀⠀ tezierature 15 constantly high

with an average around 26°C. Rainrul is heavy and eventy dro triju teu ull your, totalfing to around 2000 to 2500 mm. "This mia and moist condition

6 gultable for ruboer growing. Though there are usually heavy downpours in the afternnon, Mornings are cleur for tapping. The growing sensum is long.

2) uneltered

Snade and shelter are portunt for the rubber tree especially in its early suure, The western coas tu, are sueltered from the monsoon winds the Nu Wider hiensoon is saettered: by the Pain Lange and the SM motisoon is sheltered by the Sumatran Fountain.

3) Veli-drained Soila

lubber tree grows well on well drained lowlands or

In Malaysia, -undụiting Land.

the well-drained foothills on the western side of the Main kange form suitable terrains. Rubber, is extended to the coast- al lowland where the drainage is under control.

Cheap Labour and efficient tocliniques

Rubber growing requires

a large cheap labour force since there are many tasks invloved in running a plauation. It is also desirable for sumie b of the labour to be skilled in tapping the trees, In Western Malaysia, there is a large cheap labour force from immigrants and scientific techniques of the British who formerly con- trolled most of the plantation,

Stable co

The stable government

seas Chinese.

attructs foreign capitals and

skilful labour, e.g. the Uver-

ovourable world markets U..is the largest

exist.

consumer of rubber for making motor-car tyres.

Reasons for the diversi

It is a general trend that many of the rubber growers have now diversified their crops as the profit from

rubber growing falls. It is mainly due to the keener comp- etition From synthetic rubber that results in the fall of the demand of natural rubber, As the demand decreases, price falls and profit becomes less. The rubber growers, of course are directly affected, but the economy of the country will be

threatened too. Therefore diversification 18 greatly encouraged. Besides ther plantation crops such as oil palm, coconut and pineapple, food crops are particularly 10ortant as the country still nas to import a lot of food.

REVISION QUESTIONS:

RAIN FALL

AVERAGE ANNUAL LOCATION JULY TRANFALL BUY-SAFE, ROER TYPE

A 31°C 2000 mm 650mm Shale

P.

B

D

E

20°C 500 mm. 320mm Porphyry

20°C 500mm 16mm Granite

31°C 2000mm 1600 mm Rhyolite

31°C 2000mm Hmmm Granite

The above table shows "the climatic data and rock types of 5 different locations. which one do you think experi- euces the most active chemical weathering? Give reasons to aupport your answer.

19.

Tae diagram below shows the locations of several oilfields in China. Explain why the locations of oilfields, in

area are more favourauie than tluse in area B with reference to tue economic development of tue area

(cool Cert, 1910) concerчqu.

育教僑華

Ms. Das Prens

1978

【中會考試題複習專欄

生物 (+)

(十) 梁永華

BIOLOGY (10).

Unit 5: Homeostasis

II Conventional Questions:

The processes by which heat is lost from the human body, when the environmental temp. is at 21 C and 37 G are. listed below:

Body heat is lost by:

Radiation & conduction Sweating Respiration: Urination & defecation

lost at

% of heat: 1

27.0

70.

27

100.

a. Státe the main process by

which body heat is lost at 210. Explain how the skin helps to reduce the rate of heat lost in such way.

Is body heat still being produced when the environ- mental temperature is the same as the body tempera- ture? Explain your answer.

Explain why sweating becomes the only means of body heat lost at 37.0.

d. Give two methods, other than.

sweating, by which the body helps to maintain a

body temperature at constant

Ars

a. Body heat is mainly lost

by radiation and conduction at 21°C. To reduce heat lost by radiation and conduction, the superficial blood capil- laries of the skin constrict. so that less heat is trans- fered to the skin surface.

b. Since body heat is produced

by muscular exercise, assim~ ilation of food, and all the vital processes that contri bute to the basal metabolism, it is being produced no matter what the environmetal temperature is.

When the environmental tem- perature is equal to the body temperature, the loss. of heat from the body to the surrounding by radia- tion and conduction is impossible. For this, va- pourization of sweat becomes the only means to remove heat from the body.

d. Inertia and decreased meta-

bolic activities.

2. a. What is meant by

homeostasis?

The following graph showe the blood glucose level change of a patient auffør- ing from diabetes mellitus.

a. The capacity of living

organisms to maintain the constant internal condî- tions is known as haneo stasis.

In normal state, the

patient has a higher blood glucose level since he is suffering from diabetes. After an intake of sugar the blood glucose level increases since glucose,

the digested product, enters the blood. The blood glucose level maintains at a higher level and then goes down as the blood glucose is meta- bolized or excreted, Anga injection of insulin after the glucose level becomes steady Towers the glucose lével further since insulin increases the conversion of glucose into other substan- ces and decreases the con- version of glucose from fat and-protein in the liver.

The following graph shows the cell volume change of a amoeba and a red blood. cell when they are put in dilute salt solutions of different concentrations.

increase in cell volume

red blood ce11

0 amoeba

conc of

salt 601.

decrease

in cell volume

animal

Which of the above cells shows a hemostatic control of cellular water? Give reason to support your

answer.

How does this cell régu→ late its water content?

Explain why the other. cell hás no such hemostatic. control.

d. What are the advantages of

hemostatic control?

Ans:

The amebold cell shows a hemostatic control of. its water content.

A continuous entering of water into a cell by osno- sis can increase the cell

volume. The ability of il

amoeba to maintain its

volume in dilute salt sølu- tion and even in pure water indicates the presence of

a hemostatic control of water content, although the cell volume decreases in

Amoebu

a struc- ture known as contractile vacuole, which collects excess water in the cyto- plasm and expels its water out of the cell.

c. Red blood cell, unlike the

amoeba which lives in Tresh water, lives in isotonic blood plasma, thus no contractile vacuole is de- voloped against, the osmotiç inflow of vater.

d. Hemostatic controls keep

the internal conditions constant so that vital acti- vities would not be upset and can function normally. This is beneficial to the survival of organisms.

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