2015 科学 5月-2

SULIT t3

Section BB?jH

120 marks/20 +lAnswer all_quesriors. write your answers in the space provided.

H 8e*tl6t riff hl-'Ee^ E E Ft tft-t+i,t +{*"1"A group of scientists has carried out an investigation. They planted differentnumber of tomato seedlings on three pieces of lands p, e and R of similarareas, and then measure the average mass of the tomatoes harvested fromeach piece of lands after three months. Table 1 shows the recording results ofthis investigation.-9fl4+1K&.4r1 --'.fi 5(gf . l&,4t1ia_ p, e fr R alkfrty,laplal L]&,L4++h7 4ltr4 161 6t &ffirhffi , tE-+ n E)fr|fr6J-]t,i #r&ffi'l(tsifi1J +], fr8" F 1 .E 'rrd.:n q xtfri"te,&?tK"

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(a) State the purpose (aim) of this investigation.

fl *,o,rn'.tt all(b) State one variable that is kept the same (constant variable) in this

investigation.E * .&q.rfr *4f f ,)4. ,f!4+t+4 q 6{r

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(d)

14 028(c) Based on the average mass of tomatoes harvested on land R, state one

reason (inference).4tx.I n Lht,L#J &fr rt,b\69 + +, ffia , q *,

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State one observation to support your answer in (c).E *

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sul,rr 152 Diagram 1 shows the set-up of an investigation. A group of pupils put three

containers of different sizes on electronic scales X, y and z, and,then fill upthe containers with water, to read the readings on the electronic scales.F 1 ,E ar

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16 028(d) State the relationship between the variable that is changed (manipulated

variable) and the variable that is observed (responding variable) in thisinvestigation.E * Ed 4 *gf f ,n ,frrkq_#r+q (+*^++q&) fiv ibtfirn R.fr44 (kEL,t4q4r) zn#r *_A

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(b) Based on the condition of bread J after one week, state one reason(inference).1*xi t ffi aE- + E+JE #r,ltn, q * _+ E B (JfiBf)"

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(c) State one observation to support your answer in (b).q *,-+n-6*, ut L*i4t.E (b) 4 fr4r 8*"

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(d) State the conclusion of this investigation.E *, &'fi xbv.r Atit

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SULIT 194 Diagram 2 shows the investigation being carried out by Xiang Hui and Zhi

Hui. Xiang Hui uses a torchlight to shine on the globe, andZhr Hui spins theglobe in an anticlockwise direction. They observe the situation of the globesurface during the spinning.H Z nif. zi)tF4" ,+*W&4i fr1

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(d)20 028

If the Earth does not.revolve itself, predict how the condition of the Earthwill be.A"Ktfu,ir++A++, f ,4'l t&,t+_ Jffiix,{+A,-*+"

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sul,rr 2l5 Diagram 3 shows a pupil is using three different methods v4 X and y

to move a wooden container, and then walk for a distance of 50 m, tomeasure the time needed to move the wooden container. Table 3 shows theobservation of this investigation.

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(a)

Table 3t:State one information collected in this investigation.E *,,fr6r6 *gf f Fttk^fltlalr-+,ft++.

[l mark/ I )a\l(b) Based on Table 3, state the trend of changes in the time needed to move

the wooden container.+k+E *- 3, q *, +A\it-f;6, 14 -g6i F-.t t6l t1 q-4r,NJ X

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(c) State the conclusion of this investigation.

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i The mass of the wooden container will affect the time needed to :I move the wooden container. .

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Based on the above statement, state the relationship between the variablethat is changed (manipulated variable) and the variable that is observed(responding variable).+Y.+E Lishl n)t nA, E *,y,. rfr fkLal + q (+*^+Lqd.() fte,)t: )fr tfl,*fi#'n(kiv,lAq&) znffiXA"

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END OF SECTION B8fr,fr,#

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(d)

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