tSUBJECTIVE SECTION [60 marks]Questionl [6marksl

1. Complete the mind-mapping based on the answers given in the box below.

o Constellationso Depletion of ozone layero Household appliances. Using internet for the trade of pomographyo Development in health serviceso Mirage

(c) Science also has limitations and abuses.Examples that lead the abuses are;

12ml

Question 2 [8 marks]

Study the picture given.Complete the word puzzle for the career related to science based on the pictureComplete with suitable word in column how science is used.Study the example given.

Figure Career related to sciencep field of

science IIow science is used?

Example

Pa,ed.La,treLcl .a-r l rBiology/paediatrics

Paediatrics is used toconcern with childrenand their illnesses

l .

**

**

E-t-rn_-og;

[ 1m]Entomology

Entomology is used tostudy everything fact of

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_(e_re__(o_(otg___

[ 1m]Meteorology

Meteorology is used tostudy the earth'safrnosphere and it'schanges especially forforecasting

[ 1m]Astronomy

Astronomy is used to beexpert in everything factof

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M -.c _ a,_L_ a,_

E__L_ee_

ml

Physics /Mechanics

Mechanics is used topractice the applicationof scientific knowledgein the design,construction and controlof

!

4

Question 3 [9 marks]

We must obey all safety rules in the laboratory. Accidents in the laboratory can be disastrous.

However, they can be avoided if precautions are taken at all times.

Put a (0 for the do's and (X) for the don'ts.

Take a lot of chemicals. ( )

Wait until the end of the lesson to tell your teacher that you have bunrt yourself. ( )

Wash your hands thoroughly after all practical work. ( )

[3m]

3b). Study the pictures below.

The following diagrams illustrate some situations in a science laboratory.

Write danser/mistake in each situation and the precaution that should be taken.

Dangerlmistake:

[ 1m]

Precaution:

. . . . [ 1m]

Danger/ mistake:

[ 1m]

Precaution:.

"" [ 1m]

Dangerlmistake:

. [ 1m]

i i .

Question4 [5marks]

Study the following figure. Scientific diagram should be simple as shown in the example

below.

rlish

so I t ttion being a'aporale d

lflfe gailte

IHeat

tripad stand

Draw a neat labelled scientific, containing only sectional diagram of apparatus based on

3-D figure I below. Draw your diagram in the box provided.

[3m]

ii)

6

Choose one apparatus that are labelled above and write the function for the apparatus in

table below.

Name of apparatus Function

[2m]

Question 5 t6 marksl

Match the symbols below with the nature of the hazardous substance by putting the correctnumber in each box.

Symbol

I

t lO

2x 3. - - -ttlE)tt|0f , t,^

a.t-! t 'q: !-

4

.Lf

5

Nafure of hazardous substance

'.& Flammable substancesExamples:- petrol, alcohol, potassium,

sodium, phosphorous

t lI I

,g Explosive substancesExamples:- mixture of hydrogen

air

t l

Corrosive substancesExamples:- acid, alkali

t t

!S

's Poisonous or toxic substancesExamples:- mercury, cyanide,

chloroform

t--lI I

Stimulative substancesExamples:- chloroform, alcohol,

bromine vapour

t--lt l

Radioactive substancesExamples:- radioactive carbon,

uranium, plutonium

t--l

I Etr

[6m]

b)

Question 6 6 marksl

a) The table below shows the readings obtained by an astronaut when he used Balance M

and Balance N at two different locations.

Type ofReading of balance at location

Earth Moon

Balance M 600 100

Balance N 600 600

Name the type of balance.

(D Balance M:.... [ lm]

[ lm](ii) Balance N:

The following figure 2 shows the arms of a four-arm beam balance being used to measure

the mass (in grams) of an object.

3

Figure 2

Read the following notes given and write the scale readings

Arm reading for the heaviest mass ( the top arm)

Arm reading for the heavier mass ( 2"d from top)

Arm reading for the smaller mass ( 2"d from bottom)

Arm reading for the smallest mass ( the bottom arm)

TOTAL READING : first r second + third * fourth arms

:. . . . . . . . . . . . .grams [2m]

c)

Mass Weight

[ 1m] l rnl

-tT

in the space provided.

Write one different between mass and weight in the table below.

QuestionT Il0marksl

la). The diagrams below show various instruments and apparatus used to make

measurements.

Write down the readings in the spaces provided.

Figure Reading

Examples

I

r0 30?* 40

Reading ................cm

[ 1m]

(i)

Reading:

oa

[ 1m]

(ii)

0rgs*5f i?

Reading:

cJn

l lml

7(iii)

(i) Initial volume of

water .. . . cm

t c l l r , l l r r t '

(ii) Final volume of

water: . . . . . . . . . . cm

(iii) Volume of stone:

..cm

l3 ml

[6m]

tb) Figure 3 shows two student, student P and student Q, measuring some basic physical

quantities.

Stlflerrt F Strttletrt Q

Figure 3

Name the physical quantity and the S.I unit that measured by these students.

Student P Student Q

physical quantity

S.I unit

[4m]

Studerrt Q

Question

a)

on8 [ l0marks]

The figure 4 shows an external calliper being used to find the extemal diameter of thetest tube. Readings were taken at four different positions.

tst tulrc

Reading l:2.2 cmReading 2:2.1 crnReading 3 :2.1 crrrReading 4:2.0 cm

(i) Name another apparatus that is required for the measurements to be taken.

. . . ( 1m)

(ii) Find the average external diameter of the test tube.

( lm)

(iii) why is it necessary to take readings at four different positions?

(iv) If the intemal diameter is 2.0 cm, what is the thickness of the glass used for the test tube?

Figure 4

The following figure 5 shows the traced objects of the eraser and the piece of cloth.

lcm

/ \

/ \\

\ tI

\ t

lcm lcm

Eraser is .. . . . Piece of cloth

lcm

r\ I

(

Figure 5

(i) Based on the figure 5, fill in the blank above by using the following words.

Irregular shape Regular shape

(ii) State the physical quantity shown by the figure 5.

(iii) Estimate the areas of taced eraser and traced piece of cloth.

a) the eraser

b) the piece of cloth : . . .. . ..

l2ml

[1 m]

12ml

OBJECTM SECTION [ 40 marks]

Which of the following isthe correct definition of technology?

A The study of natural phenomenaB The discovery of a vaccine to cure diseasesC The investigation of how the climate changes

globallyD The application of scientific knowledge for

practical purposes

Which of the following apparatus isused for measurins?

Which of the following shows thevalue of the prefix correctly?

Which of the following apparatuscan be used to measure 25 ml of aliquid accurately?

burettepipetteEureka canmeasuring cylinder

Figure IWhat is the use of the apparatus as shown infigure 1?

containing chemicalsmesuring the volume of a liquidmeasuring a fixed volume of a liquidtransfering a small amount of a liquid

Hafrzihas a body mass of 40 000 g.What standard form is wriffen for thisquantity?

4.0 x 103 g

4.0 x 10-3 g

4.0 x 104 g-4

4.0 x lO 'g

ABcD

ALj

D\./

\ /

l lABcD

kilo: 10-3

deci: 10-1

centi: 102

milli: 10-2

The inforrnation shows the memories of four computers.M- 3.2 gigabytesN - 2.4 terabytesO - 4.2megabytesP - 12.8 kilobytes

Which computer has the biggest memories?AMBNCO

A

B

C

D

Why pouring unused chemicals back into

their containers is discouraeed?

A saves costsB dilutes the chemicalsC may contaminate the chemicalsD increases the concentration of the

chemicals

Figure 2

Which of the following symbol should belabelled on X?

rFtts#ffi

A

ffiffi

c

13

Why must one check the label on thecontainer of a chemical before using it?

A To know the colour of the chemicalB To know the quantity of the the

chemicalC To know whether the chemical can be

reusedD To make sure that the correct

chemical is used

I tO I Figure 2 shows a bottle containingconcenffated hydrochloric acid solution.

I t t I Figure 3 shows thehazard, symbol of substance X.

B D

Figure 3

What is the best way of handling substance X?

A Keep in a lead containerB Keep under the paraffin oilC Keep away from heat sourcesD Avoid contact with skin or eves

Which option below represent correctly thedifference between the mass and weight of anobject?

A

B

c

D

Mass WeightIt is lower on the

moon than on Earth

It is the same on the

moon and Earth

Its SI unit is g Its SI unit is N

Measured using a

lever balance

Measured using a

spring balance

It is the quantity of

matter in the object

It is the quantity of

atoms in the object

A student is heating a substance as shownin figure 4.

alcohol

Figure 4

What is he doing wrong?

A He should use a water bathB He should not use a wire gavzeC The beaker should be held bv a

retortD He should heat the substance in a

test tube

Which one of the following is not a basicphysical quantity in science?

AreaMassTemperatureElectric current

If the volume of 20 marbles is 50 cm3, whatis the volume of one marble?

A 1000 cm3

B 70 cric 2.5 cm3D 0.4 cm3

Figure 5 shows the luminous flame ofa Bunsen burner.

Which of the following statements is trueabout the flame shown?

A It has an inner zone wherecombustion is complete

B It will change into a blue flame ifthe air hole is opened.

C It does not produce any soot.

D It is a very hot flame.

What are the tools for measuringlength of a curved line?

I apat of callipers and a ruler.

II a vernier and a ruler.

III a thread and a ruler.

IV an opisometer and a ruler.

A III and IV only

B I, II and III only

C II, III and IV only

D I,II, III and IV only

til

/ r ' t l

\dI ttr'

Figure

ABCD

15

The results of an experiment to determine

length of a curve is shown in Table 1.

Experiment Length (mm)

I 273

2 276

3 274

4 277

Table

What is the average length of the curve?

A 273 mm, C 275 mm

B 274nm D 276mm

What is the field of specialisation for

physiologist?

A person who studies planets

A person who studies theweather

A person who studies rock andmineral

A person who studies theinteraction between livingthings and the environment

46.3 cm3

What is the volume of the piece of metal asshown in Figure 6?

the

A

B

c

D

EI\D OF QUESTION PAPER

@""A &r"n

4.63 cm3

s.s2 ci

46.3 cm3

ss.2 c#

A

B

c

D

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