1977-11-02 — Page 27

有教儒華頁三第張七第日一廿月九年巳丁麻至

WAH KIU YAT PO

報日僑

RAINFALL

1

教僑華

FIG. II A TYPICAL RUBBER ESTATE

school, plinic, templa exo.

1978

| 中學會考試題預習專欄

Hill Doll

地理(五)

李婉儀

GEOGRAPHY (5)

Suggested answers for Q.6 & 7:

CHLANGES OF TEMPERATURES : The ny tam of day and- night temperatures chiefly

eratures reflects the balance between incoming solar radiation and ou going earth radiation. during the 24-hr. period (FIG. 1). The incoming solar energy is mainly determined by the angle of incidence of the aun's rays waile the out- going earth's radiation, 18. mainly determined by the amount received

The sun usually rises at about 5:00 when at noon it is at its biggeð u angle. Tnen the angle becomes smaler and smaller. at auout 17:00 to 19:00, it sees. Tous the tem- peratures of that particula. “uẩy continued to rise until

£4:00 to 10:00 when engagY: was being supplied by com ang solarradiation faster. than it was being lost to space by earth. The temper- atures fell from about 15:00 to 16:00 to sunrise when losses through earth radiation exceeded receipts of solar energy.

Temperatures at dawn right before sun rise (04:00

06:00) are the lowest when much heat had been radiated from the earth and the sun had not yet risen. Tempera- tures at noon and at 14:00 are the highest. It is 7. because the bigger angle of incidence at that time makes radiation more intense.

Max. Temperature

vek radiatim

arth radiasive

Representaion of

the march of incoming solar Pradiation and of outgoing

earth radiation for the daily 24-hr, period at about the time of an equinox, and their combined effects upon the times of daily maximum and minimum temperatures.

CHANGES - OF RU.S.

Since R. is a ratio which represents the amount of water vapor actually pre- sent in the air compared with

the greatest amount that could present at the same temperature, oil changes with a change either in

amount of water vapor or in

ne capacius of the air. The capacity of air for holding water vapor depends almost

When

xclusively on its température. Varm air is able to contain much more water vapor than cold air. Loreover, air capacity for holding water vapor increases at an increa- ing rate as the temperature rises. Thus, it.1. changes with a change in temperatures. When the temperature is low, moisture holding capacity is pmall, caus the ratio is

reat and R.H. high. temperature 18 higu, moisture holding capacity is large, tnus the ratio is small and R.H. Jow. So tae H.H. of

that day was the highent at: 04:00 when comperature was the lowest.

It fell and kept on falling with the increase in temperasures till 14:00, it reached its lowest point when temperature at that time was the highess. Then it began to ride as tempera- tures started to fall after- Warde.

Rainfall of 45 m.mJA WAKO recorded at 16:00, The rain was tourential, It fell in the afternoon when overnsated land surfaces set up strong

Am

vertical air ou esture:

the air rase, its.

was reduced until condensat-

ion took place, cloud formed and finally rain fell. It' fell as convectional rainfall.

CROPS GROWN-

Rice may be grown in Ares

A (Mong, Tseng), with sweet potatoes, groundnute arter the harvest of rice. It is because the urea 10 lowlying and flat, and the subtropical climate of Hong Kong, with high temperature and abundant rain concentrated in sumer, suit

the growing of rice. The presence of the duck ponds provides irrigation water and the dumpings of ducks make good fertilizer. The Lucon- venience of transportation does not encourage the farmers there Lo convert their fielda to market gardering. However, if rice is grown, it does not pose any problem since rice needs not be transported to market everyday.

Market gardening may be practised in Area B (Tai Po Tau).

white A TIM such as.

flower cabbage, Cainese kale etc. and flowers are grown because transport- ation is easy. The presence of railway and main road make possible the quick

delivery of me perashaole products to urban centre. Besides, irrigation water

can be easily obtained from the rivers running across the area.

-SETTLEMENTS

There are more houses in: Area A. They are nucleated. settlemente, consisting main=” ly of traditional houses, located at foothill to avoid waste of fertile land and flooding. Since the growing of rice does not need constant

farmers can live for care, from their fields and close to each other, for the purpose of deience and cooperation during farmwerk.

in Area B, linear Bettle- ments are found along narrow road or wooden huts scautered a'oungst fields, Farmers like

to live amongst fields since vegetables and flowers growing is very intensive. They have to watch the crops irrigate the fields, har- vest the crops and transport the products to the urban center every day.

X

QUESTIONS FOR NEXT WEEK

Study the figure below, a. Say to which of the

places A, Y and Z of the graphs A, B and corresponds,

Describe and account for the differences in temperature and rainfall patterns of A and C,

TEMANJ ZA5UND ZÉDONIETALONE

27+'s

sketca map along AZ

FIG. 1. CLIMATIO GPS, STAT IONS AND SKETCH MAP OF AUST.

Roads

atreams

Sub divisions

Collecting station

aa Village

storage aned

Areas yielding rubber Raplanted but immature trees

El Areas of old rubber trees

and areas being cleared:

information: SIZE: 2,200 ha.

SLIEF: undulating foothill

country

SOILS: ALLuvial OWNERSHIP: Dunlop Co. STAFF:

5 Managerial staff #600 tappers (Mglay40%;

Chinese 40%, Indian 20%) 150 general labourers

Study, the

the diagram and inform- alon given above

a. Say what type of farming is practised in the area and how does сце farm illustrate tue generMİ charactice of such a type of farming. Discuss the future deve- lopment of this typu ut farming.

生物

(五) 梁永華

BIOLOGY (5)

Unit Three: Water and Organisms

I Multiple Choice Questions:

1 when red blood cells are

placed in distilled water, they

A swell only D. Bwell and B. burst only burat Ca shrink only E. shrink and

burat

2.When red blood cells are

placed in 5% sucrose solution they swell and burst. This shows that the concentration of the cytoplasm is

A higher than 5% sucrose sol. B. lover than 5% sucrose sol. C. equal to 5% sucrose sol. D. higher than 5% susrose sol. at first and then lower: than it later

E. none of the above 3.Sodium Chloride is commonly

used as a preservative for "food preservation because

A. it changes the på value ·

of the food so that growth. of bacteria is inhibited. B. it denatures the bacterial

toxins,

c. it inhibits cell division D. it extracta vater from

food so that bacteria. cannot grow.

E. it slows down the metabo-

lis activities of bacteria. 4.When amoeba is put in sea

water, the nativity of its contractile vacuole would

A. increase D. have a unser- B. dècrease tain ohange C. have no K. disappear

change

5.A pig's bladder with 5% X

solution is tied and placed in 5% 7 solution, I solution contains come enzyme, Later substance. Z is found in X-- solution. Which of the fol- lowing processes has been involved 2

A.1

1) digestion = 3) osmosis 2) respiration 4) conduction

B. 13 C. 23 D.34 B.123.

6.The following change of “

a leaf epidermal cell known as

A. plasmolysis D. transpi- B. osmosis

ration

C. diffusion E. photosyn-

thesis

7-A plant that carries on very

little transpiration in its natural environment would

most likely have

1) a thin leaf cuticle

2) few lenticels

3) hairy leaves

三期星

4) compound leaves 1.12

日二月一十年七七九一届公年六十六國民華中

Figure 2.

8. 23 To. 24 D. 34

8. Solve the equation

4180

E. 1234

8.Which of the following grapha

show the effect of relative humidity on the rate of transpiration of plants?

t:rate of

transpiration

h:relative hupidity

9.Which is the correct sequence

concerning the effect of light on stomatal movement ? 1) the change of starch to sugar in guard celle

2) carbon dioxide is used

up by photosynthesis 3) water is drawn into the

guard cells

4) the guard cells become Curve and the stoma is opened

5) the cell sap becomes slightly alkaline

A.12345 B.21354 0.25134

D. 31542 G. 41325

10.Which of the folloving is

not a regulatory function of the kidney? #

A. regulation of the body

temperature

B. regualtion of the blood

volume

c. regulation of the amount

of plasma

D. maintainance of the pl

of the blood

E. maintainance of the chemi cal composition of the blood

Ans:

1.D 2.A 3.D 4.8 5. 7.B 8.B 9.0 10, A

6.A

新數學 (五) 香榮家

MODERN MATHEMATICS (5)

Test Three

Answer all the questions in section A and any six in section B. All necessary working must be shown clearly. SECTION (40%)

1. In a public library there

are 110,000 books 40% of which are science books, It was decided to

new books to thα 20,000-

library.

How many of the new books should be science booke in order to bring the percent- age of science books in the library up to 45% ?

2

2

25,

and x

+32 336. Find x, y and 2.

3. As shown in figure. 1, PA~4 AB 5, PT is a tangent at point T. Find the length of PT.

Figure 1.

4. If xe R, find the solution

set of

(*)

5. Find the equation of the

atraight line which passes through the point of inter- section of x + 3y = 2 and 3x - 5y = 3 with alope equal to 2,

6. Find that the set of values

of xe R such that

x(x-2)

7. In figure 2, ADE is an

equilateral triangle and ABCD is a square, find the angle BEC..

sin30

where

SECTION B (60%).

9. Prove, by mathematical

induction that;

n

a+bis divisible by (a + b) for all odd natu... ral numberse

10. A straight line

cuts the circle

2.

x-3y+6 =0

x2+y2=10x-14y+54=0

at points A and Ba (1) Find the radius of the

circle.

(Fi)Find the perpendicular distance from chord AB to the center of the circle.

(iii) Hence, or otherwise

prove that the chord AB subtends a right angle at the centre. (iv) Find the area of the

minor segment formed. 11. In triangle ABC, AB -

If P - AB, ¶ - AČ (i) Is p equal to ↑ ? why ? (11) Express AD in terms of

P. and where D is the mid-point of BC. (iii) Hence, or otherwise,

prove that AD is per- pendicular to BC by. finding the value of AD BC.

Three numbers are in the ratio 1 5 11. T 3 is added to each of the numbera, the resulting numbers will form a geom- etric progression Find the original three numberë,

13. In the equation

2

6x2 + kx + 2 = 0

the sum of roots exeeds

the product of roots by

8

Find the value of k

ence, solve the equation,

14. In figure 3, three iden-

tical circles of radius

42cm touch each other. (take T =

222/7)

(1) Find the

(ii) Find the area of the

shaded

Figure 3.

15. John has 105 catties of

te 4, 100 catties of tea

B and 90 catties of tea C. Two mixtures X and Y are made by mixing tea A,tea B and tea C in the ratios. 7 | 5:3 and 3: 5:5 respectively. The profit of mixture X is $20 per catty and that of mixture Y is $12 per catty. (1) How many catty of each

mixture should be made to give maximum profit ? (ii) What is the profit? 16. Liquid fuel is

pumped into a storage tank, The following table shows the number

of gallons of fuel in the tank at various after the flow started..

Time

(in min.)

5

15 25 35 45

Quantity 60 160 260 360 460 in gallons

Represent graphically the ahove data, and use your graph to answer the following questions

(1)

Do

we have reasons to believe that the rate of the flow is constant ? why ? (ii) Assuming that the rate of the flow is constant,a. find this constant rate and find the quantity of liquid fuel that was already in the tank before the flow started. (iii) Assuming that the tank holds 750 gallons, how long would it take to fill the tank from the start of the flow if the flow continues at the same rate t

P