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Candidate Name: Class: Index No:

DUNMAN SECONDARY SCHOOL

Wherediligence, discernment, discipline, daring,determination & duty become a part of life.

___________________________________________

END-OF-YEAR EXAMINATION 2006

SEC 1 EXPRESS

LOWER SECONDARY SCIENCE

2 Hr 11thOct 2006

Instruct!ns t! C"n##"t$s%

Do not open this booklet until you are told to do so.

Write your name, index number and class on any separate answer paper used.

Section A

Answer all questions.

Write your answers in the OMR provided.

Section B

Answer all questions.

Write your answers in the spaces provided on the question paper.

Section C

Answer all questions.Write your answers in the writin paper provided on the question paper.

At the end o! the examination, submit the OMR answer sheet, "ection # and $separately.

%n!ormation !or $andidates&

'he number o! marks is iven in brackets ( ) at the end o! each question.

$andidates are advised to show all their workin in a clear and orderly manner.

'his question paper consists o! *+ printed paes includin the cover pae

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Section A&

Multiple-Choice Questions& -os. /+ (/+ Marks)

. %! a scale reads & 0++ on a map, what is the actual area o! a piece o! !armland

which has an area o! 1 cm*

on the map2

A *+++ cm*

# *+ m*

$ ++ m*

D *+++ m*

*. 'he side o! each unit square is

+.0cm. What is the area o! the

shaded !iure2

A * cm*

# 1 cm*$ 3 cm*

D 4 cm*

/. What is the volume o! water2

A *+ cm/

# *5 cm/

$ /+ cm/

D / cm/

1. Which o! the !ollowin is -O' a characteristic o! weiht2

A Weiht is a kind o! !orce.

# Weiht is produced by ravity.$ Weiht increases as you walk up the staircase.

D Weiht is measured in -ewton.

0. Which o! the !ollowin about density is -O' 'R672

A 'he density o! warm air is less than cold air.# 'he density o! liquid is enerally hiher than air.

$ 'he density o! ice is hiher than water.

D 'he density o! iron is less than mercury.

*

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4. Which o! the !ollowin is NOTa characteristic o! clinical thermometer2

A 8as constriction

# Accuracy is $

$ 'emperature rane !rom /1 9 1*$

D $ontain mercury

:. Which o! the !ollowin examples shows that !riction is help!ul2

A Writin with a pen

# ;roducin heat in the car enine

$ Wearin out o! machine movin partsD "lowin down o! the ball durin "hort ;ut throws.

3. Why do nails have sharp points2

A ;roduce hih !riction when takin out o! an ob

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+. Which o! the !ollowin contains a bimetallic strip2

A 7lectric !an # 7lectric bell$ 7lectric iron D 'elevision

. 'he !ollowin is a simple circuit o! a !ire alarm&

What is substance A2

A Aluminium # %ron

$ $opper D ;lastic

*. On a hot sunny day, Mary bouht !our icecream cones o! co!!ee >dark brown?,

strawberry >pink?, mano >liht yellow? and vanilla >white? !lavours, !or her!riends. 8er !riends were sittin in the void deck ++m away. When she reached

her !riends, which !lavour o! icecream cone would have melted most2

A $o!!ee !lavour

# "trawberry !lavour

$ Mano !lavour D @anilla !lavour

/. Which o! the !ollowin is -O' true !or sea breee2

A "ea breee takes place in the a!ternoon.# "ea is warmer than land.

$ Wind brows !rom sea to land.

D %t is caused by convection.

#7BB

#attery

contact

bimetallic strip

substance A

1

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1. Which o! the !ollowin sources o! enery is renewable2

A $oal# ;etroleum

$ -uclear 7nery

D Wind 7nery

0. Which o! the !ollowin possesses chemical enery2

A Water stored behind a dam

# A stretched rubber band

$ Wind

D Oil

4. Which o! the haard labels should be put on three bottles, each containin

concentrated sulphuric acid, ethanol and mercury to represent the nature o! the

three chemicals2

I

$oncentrated

sulphuric acid 7thanol Mercury

A @ %% %%%# @ %@ %%%

$ %% %@ %

D %@ %% %

: Which o! the !ollowin isCare not a characteristic o! livin thins2

% make their own !ood %% produce sounds

%%% produce waste products %@ respond to chanes in their environment@ move !rom one place to another

A % only # % and %% only

$ %%%, %@ and @ only D %, %% and @ only

0

II

%@ @

%%%

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3. "tudy the classi!ied table shown below care!ully.

%denti!y the leaves shown below accordin to the key iven above.

; R "

A hobblebush honeysuckle oak maple# honeysuckle hobblebush maple oak

$ oak maple honeysuckle hobblebush

D honeysuckle oak maple hobblebush

5 Which o! the !ollowin is nottrue o! the lobster and the cockroach2

A 'hey have semented bodies.# 'hey are vertebrates.

$ 'hey reproduce by layin es.

D 'hey have an exoskeleton.

4

leaves

P & R S

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*+. Which statement reardin separation o! liquids by !ractional distillation is

incorrect2

A Elass beads are added to the mixture o! liquids in a distillation !lask to ensure

smooth boilin.

# 'he liquids to be separated should !orm two distinct layers.$ 'he liquids to be separated must have di!!erent boilin points.

D A !ractionatin column is used to provide additional condensation sur!ace.

*. A certain brand o! sweets contains a !ood colourin F, which consists o! a

mixture o! dyes. A paper chromatoraphy usin water as solvent was carried out

to identi!y the dyes present in this !ood colourin. 'he results, shown on thechromatoram below were then compared with chromatorams o! known dyes ,

*, / and 1. Only dye 1 is harm!ul to health.

Which o! the !ollowin cannot be deduced !rom the chromatoram2

A =ood colourin F contains / dyes which are sa!e !or consumption.

# Dye / and 1 are absent !rom the !ood colourin.

$ Dye * is most soluble in water.D Dye / is insoluble in water.

**. Which o! the !ollowin statements is nottrue2

A An element contains only one type o! substance and cannot be broken down into

any simpler substances by chemical methods.# A compound is made up o! two or more elements chemically

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*/. Which o! the !ollowin contains a aseous mixture, a solid compound and an

element that is a liquid at room temperature2

A steam, carbon, mercury

# carbon dioxide, ethanol, aron

$ air, copper>%%? sulphate, bromineD air, milk powder, mercury

*1. A student carried out experiments on a suar cube as shown below usin water asthe solvent.

Which o!

the !ollowinstatement>s? about the experiments isCare correct2

% 'he student wants to study the !actors that a!!ect the dissolvin o! a suar cube.

%% 'he student wants to !ind out the best solvent !or the dissolvin o! a suar cube.%%% 'he volume o! water and sie and mass o! suar cube used must be kept constant

in all experiments.%@ 'he results would show that crushin the powder and heatin the water will ivethe shortest dissolvin times.

A % and %%% only # %% and %@ only$ %, %%% and %@ only D all o! the above

*0. Which o! the !ollowin statements about solutions is incorrect2

A A solution can be made usin water as solvent or other solvents like ethanol.

# A concentrated solution is one that contains a lot o! solvent with a small amounto! solute.

$ A saturated solution is one that contains the maximum amount o! solute in a iven

amount o! solvent.D A solution can be made by dissolvin a solid in another solid or a solid in a liquid

or a as in a liquid or as

3

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*4. Which o! the !ollowin contains one item that does not belon to the roup2

A alae, virus, bacteria, !uni# tortoise, liard, crocodile, iuana

$ eale, swallow, stork, bat.

D whale, do, dolphin, lion.

*:. Which one o! the !ollowin cell carries messaes in the !orm o! electrical

impulses around the body 2

*3. Which o! the !ollowin about animal systems is incorrect2

A Respiratory system comprises nose, luns and diaphram.

# Diestive system comprises mouth, stomach, liver, intestines.

$ -ervous system comprises nerves, spinal cord and brain.D $irculatory system comprises the heart, arteries and veins.

*5. 'he air that is blown into an unconscious person durin mouthtomouth

resuscitation has more GGGGGGGG than the surroundin air.

% oxyen %% carbon dioxide%%% nitroen %@ water vapour

A % and %% only # %% only

$ % and %%% only D %% and %@ only

5

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/+. A student used the apparatus shown to investiate how liht intensity the rate o!

photosynthesis.

What conclusion can be drawn !rom these results2

A 'he rate o! photosynthesis increases as the liht intensity increases.

# 'he rate o! photosynthesis decreases as the liht intensity increases.$ ;ondweed will photosynthesise at any liht intensity.

D Biht intensity has no e!!ect on the rate o! photosynthesis.

End of Section A

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Dunman Secondary School

!!" End-of-#ear E$amination

%o&er Secondary Science

-ame& GGGGGGGGGGGGGGGGGGGGGGG$lass& GGGGGG > ? Marks& GGGGGGG C1+

Section B&

Short-Ans&er Questions& -os 9+ (1+ marks)

. A @ernier calipers has a ero error as shown below.

a. What is the ero error2 ()

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

b. 'he @ernier calipers is used to measure the diameter o! a marble and has the!ollowin readin.

What is the corrected diameter o! the marble2 ()


c. 7xplain why it is better to take more measurements and !ind the averae diameter

o! the marble2 ()

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG


cm Main scale

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* a. 'he time taken !or the pendulum to move !rom ; to is +.3 sec. 8ow lon will it

take to make one oscillation2 ()

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

b. What will happen to the period >time !or one oscillation?, i! a lump o! plasticine is

attached at the bottom o! the pendulum bob2 7xplain your answer. (*)

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG



/. A stone has mass ++. When it is immered in a measurin cylinder, the waterlevel rises !orm *+cm/to 10cm/. $alculate the density o! the stone. (*)

>"how your workin?

1. 'he ravity o! Moon is C4 o! the 7arth.

a. An astronaut weihs 4++- on 7arth. What is his weiht on the Moon2 ()

b. What is his mass on the Moon2 ()

*

;Q

'

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0. When the space shuttle launches, it positions itsel! in vertically. #ut when it returns

to the 7arth, it positions horiontally. 7xplain. (*)

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG




4a. A do weihs *++-. 7ach o! its !oot has an area o! +.++m*. $alculate the

pressure it exerts on the round. (*)

>"how your workin?

b. %! you li!t up the do by its two !ront !eet, how much !orce do you need to exert2

(*)

>"how your workin?

/

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:a. Hohn carries a *++- suitcase up two !lihts o! stairs >a heiht o! / m each? and

then pushes it with a horiontal !orce o! 0+ - at a constant speed o! +.0 mCs !or ahoriontal distance o! *+ metres. 8ow much work does Hohn do on his suitcase

durin this entire motion2 (*)

>"how your workin?

b. A squirrel >mass o! k? does pushups by applyin a !orce to elevate its body by0 cm. Determine the number o! pushups which a tired squirrel must do in order

to do 0H o! work. (*)

>"how your workin?

1

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3a. $omplete the table below listin similarities and di!!erences between a typical

plant cell !ound in the lea!, an onion skin cell and an animal cheek cell. (/)

=eature Bea! cell Onion skin cell Animal cheek cell

cell wall$ell wall present

vacuoles

Bare, central

vacuole

chloroplast

$hloroplasts present

b. Eive the !unction o! these parts in a typical plant cell (/)

i ribosome

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

ii cytoplasm

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

iii. cell membrane

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

5. A student added a solid A to beaker A and a solid # to beaker #. #oth beakerscontain the same volume o! water. 'he mixtures were stirred !or + seconds at the

same speed and le!t to stand !or 0 minutes. 'he beakers had the appearance as

shown in the diarams below. #eaker A contains a clear, colourless solution and#eaker # looked cloudy with white specks o! the solid #.

0

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a. "tate two !actors that the student must control to ensure a !air test. (*)

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

b. Describe two other ways the student can use to con!irm that #eaker A contains a

solution. (*)





c. -ame a compound that could be solid A and another compound that could be

solid #. (*)


+. ;hotosynthesis and respiration are two very important processes.

ai. Eive two reasons why photosynthesis is important. (*)





ii. 7xplain why it is not advisable to place reen plants in a bedroom at niht.()



bi. %s it possible !or an oranism to undero aerobic respiration without breathin2

7xplain. ()



4

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ii. Write the word equation !or aerobic respiration. ()


iii. "tate one di!!erence between aerobic respiration and anaerobic respiration.()


c. =ill in the table to show the di!!erences between photosynthesis and respirationbesides the di!!erence in the startin materials required and products !ormed.

(*)

;hotosynthesis Respiration

End of Section B

:

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Section C&

Structural Questions( -os 9 / (/+ marks)

Answer all threequestions on the writin paper provided.

a. 'wo lass cups are stuck toether."uest a way to separate them without breakin.

7xplain the principle involved. (*)

b. 7xplain why metal water pipe easily burst in Winter. "uest a way to reduce the

pipe crackin. (*)

c. Medieval knihts liked to wear armour. "uest two advantaes o! wearin asilvery armour !or battles. (*)

d. Draw a thermos !lask. 7xplain how it minimised heat trans!er. (1)

* 'he diaram shows how enery is produced !rom a !ossil !uel power station andsupplied to home usae.

a. Eive two examples o! !ossil !uels. (*)

b. Describe the enery chanes&

i. in the boiler.ii. in the enerator.

iii. in the television. (/)

c. 7xplain how you can carry out * tests to con!irm i! a rey solid is a metal or non

metal. Iou need not describe details o! the tests. (*)

3

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d. A student accidentally dropped a tray containin a bottle o! iron !ilins and

sulphur powder. 8e scooped up the solids and then added water to the mixture

hopin to separate them by !iltration. 8owever, he was not success!ul. 7xplainwhy his method o! separation does not work and suest what he can do with the

mixture o! solids and water instead to obtain a pure sample o! each solid aain.(*)

e. 6se the ;eriodic 'able to identi!y the Eroup and ;eriod number o! sulphur. ()

/. 'he diaram below shows the cells that make up a lea!.

a. %s the lea! considered a tissue, an oran or a system2 7xplain your answer. (*)

b. -ame the part o! the lea! that serves as a protective layer aainst in

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