二期星 日卅月五年二七九一圈公年一十六國民中育僑華
頁四第張五第一日八十月四年子壬麽旻
報日僑罩
WAH KIU YAT PO
英中會考數學科答案(二)
英中會考地理科答案
堅道英文書院,
堅道英文書院
Mathemation.
(Lauron 31)
Suggested Solution to Mathem
paper two.
(6)(a) (
tion: 4
the square of
any real rusber is non-negativs,
The arithmetic mean of
not less than the garnetzio mean of
-596
20 - 596
590
20
The four consecutáve odd numb
9, 11, 13, 15.
or -15,
--
GEOGRAPHY II (30)
Suggested Ingwer
Section A (Physical Geography)
1.(a) The map, rigure 1, showe a storm,
the centre of which would pass. directly over the western part of Hong Kong. Describe the weather experienced in Hong Kong during the 24 hours after this map was drawn.(9%)
ARE
When the eye of the tropical cyclope
·was directly over the western part of the Colony, guạty: strong winds with an average speed of over 60 knots would blow from the north-saaterly direction. In fact tha weather chart indicates north-easterly wind with a speed of 70 knots was expori- " venced in Hong Kong. ). The Barometer recorded
a pressire of only 994 mbe. Accompanying the strong wind is heavy and torrential rain especially bordering the centre of the typhoon
(II) Sedimentary rock- they are formed
by the compaction and cementation of sand, pebbles and other frag- mente derived from pre-existing rocks. The sedimentary rocks are) commonly stratified and contain fossils as well as coal and petrom. leum. Examples are shale, cong- lomerates.
(III) Netamorphic rock:- if the pre-~ existing country rocks suffered intense pressure e.g. during the formation of fold mountains on heating, then their structure and chemical properties may be altered. to form a new kind of rock termed metamorphic rock, Examples are pchiut, slate.
Draw hand specimens to show the main features of
(1) Hong Kong Granite Hii): Tak Me Shan Porphyry ·
and describe the characteristics by which you would indentify each.
HAND SPECIMEN OF H.K. GRANITE
felspar
ctca
-(b) (5 − 1)(1
+ 20.7/18
(
2)(x + 1) <07
Consider (z - 2)(x + 1)
then
consider the following table
(x + 1)
The solution to the given inequalit
I
7)(-) When two geometric means are added
between the numbers, -7- sad 875, there are totally 4 term in 0.P. lot the 4 terms in G P. ba an
(-7)(-5) - 25
· (-7)(-5)2 - -175
The two geometric mean'a to
are 35 and -175.
(b) The first term
The second tera The 50
The product of
[* (a)(ar)(ar2)
5°(x) (x2)(x2)
first 50 terma
Car
250
49 × (1+
(8) b (x2
ax(x
(2
a22(x
(x + a) (a
b) Let the four consecutive odd numbers
be Za – 3, 2a – 1, 2a + 1) 2a + 3 where a is an integer.
3/
(za
(2a − 1)2 + (24
596
the fraction
(1) + (2) * * * *
-
uning
αλα
ing
(10) (1) Volocity of à relative to
(15 – 9) rt/s00.
L
5 ft/sec.
be the length of ship B.
6 x 31 192
length of ship Bis 92 ft.
Velocity of ship a relative to the Courrent
(15 + y)" ft/a8C, Velocity of ship 3 relative to the Currest
(9 - y) ft/s00. Velocity of ▲ relative to
(15 + y + 9 −))
24 ft/800.
Sum of lengths of the shipa
100 ft 92 ft.
192 ft.
Time taken for the ships to pass. each other complete
As the tropical cyclone moved inland, the speed of the wind may remain strong. and gusty but now it blowe from the southe western corner. Hainfall may decreas little and periods of overcasted sky.
Towards the latter part of the fore- cast period, with the storm completely in- land, the wind speed rapidly to less than about 30 knots with periods of shower only. The pressure rises very rapidly as the storm dissipates in the interiors (b) Explain briefly why the salinity of
the oceans is generally higher at approximately latitudes 30 N and 30 g than aither gear the Equator or at. latitudes 60 N and 60's.
Ang-
What other factors can cause variationa in salinity? (76)-
The salinity of the oceana is gener ally higher at approximately latitudes 30°N and 30 S because in this region if is under the influence of the trade wind which is warm and dry since they blow away from the continents. Aa high temperatures promote evaporation that leads to concen- tration of salts, the oceans at the trade wind latitudes are thus more saline than the equatorial and polar seas.
The polar oceans experience very low annual temperature and so the rate of. evaporation is reduced to a miniinum where- as the equatorial oceans receive a large amount of surface runoff from the rivers. and streams. These two factors account for the lower salinity encounters in these two regions.
Besides the above mentioned factors, the amount of melting ics, the rate of mixing, which is in turn governed by Doean ourrents also cause variations in salinity.
The tropical aavana woodland and the cool temperate woodland are both cal- led deciduous. Explain why sạch, them is daoiduous, and briefly. describe the characteristics ox these types of woodland,
Ans. The tropical savana woodland is deciâu ous because during the winter season whenI there is little or no rainfall, the trass have to shed their leaves to reduce the rate of transpiration. The umbrella-shaped orowne is another method to reduce the amount of moisture lost by sheltering the Foot system from the direct ray of the - sun
In the cool temperate belt, trees shed their leaves in winter in order to protect themselves against frost and to reduce the rate of transpiration..
The tropical savana woodland is 7 characterized by a "tall grase, low tree landscape and is often referad to aa savanna parkland. The trees are wedgem or umbrella-shaped, as a result of the strong winds that blow over the open grabsTM lando All the trees have special organs to adapt themselves to the winter drought.
In the sobi temperate woolland, there ajomall variety of trees, and stande of the same species are very common. Conifere replace deciduous trees in areas where the soil is not fertile, or in upland
group Undergrowth is common with climbing plants, the density of the under- growth depends on the spacing of the trees.
(a) Give the names of the 3 major groupe
into which rooks can be divided and explain briefly how each has been formed,
Booke qan be divided into 3 major Lasses according to their mode of origin.
mode (1) Igneous rock - they are formed by
the cooling down of molten mater- ials beneath or above the earth! surface. All of them display cry- stalline structure and in some cases e.g., granite the most import- ant rock forming minerale can be, indentified quite easily..
quartz
a.Hong Kong Granite can be identify
since it contains well-förmed mineral, crystals which have distinct solğura Quartz which is the chier constituent is Demi-transparent or milky while mica le black and felspar is pinki A hand specimen of B.K. granite is light in colour with mineral crystals that can be identified without the help of a microscope,
HAND SPECIMEN OF PORPHYRY
quartz
mica
felspar
Tal Mo Shan Porphyry is dark and is heavier than granite. It is characterized by large and well formed orystals of felspar in a dark groundmass. It usua occurs in sills and dykeá..
) Illustrating your answer in diagrame
describe both the work of underground vater in a limestone region and the Features it produces.
Ang The work of underground water in a limestone region is mainly that of solu- tion and transportation, Since limestoni is soluble in acid, therefore, when rain- water which contains a slight amount of dissolved carbon dioxide passes through a limestone region, the surface rocks may be dissolved and transported to the underground. As a result, the surface is usually very irregular with numerous, furrOWB
Features in a limastone:
1)
@ink hole it is an opening through which the surface streame disappear underground.
dry valleyst- as limestone aLLOWS. water to escape underground, there- fore valleys are dry in most parts of the year-
Cavern- it is an underground cave carved out from limestone by the solution effect of running water.
Stalacita it is formed by the de- position of calcium carbonate into. a long post-like feature on the roof of the cavern. Stalagmite – it is thicker than stalacite and is found on the floor of the cavern.
LIMESTONE FEATURES
sink hole stalacite stalagmite
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