BECE Past Questions & Answers – 1993 (SCIENCE)

August 1993

SCIENCE

SECTIONA OBJECTIVETEST
45 minutes

1. Thethreestates of matter are A. Water, liquid and gas B. Earth, liquid and gas C. Solid, liquid and air D. Gas, earth and water E. Gas, liquid and solid

2. Soilerosion ….
A. washes awaythe water content ofsoil
B. enables crops to grow better
C. washes awaythe top soil
D. leaves the soilfreeof pests
E. increases the fertilityof soils

3. What is the averagebodytemperatureof ahealthyperson?
A. 25°C B. 36°C C. 37°C D. 38°C E. 39°C

4. Steel is an alloyof
A. Iron and Carbon B. Zincand Copper C. Tin and Copper D. Iron andZinc
E. Carbon andZinc

5. Leguminous crops suchas beans mayoften be cultivated to
A. Add humus to the soil B. Add nitrogen to thesoil C. Add protein to thesoil D. Makethe soil loamy
E. Increase thecalcium content of the soil

6. Which ofthe followingis an excretoryorgan?
A. Anus B. Eye C. Heart D. Skin
E. Pancreas

7. Which ofthe followingis the function ofthe hairin thenose?It
A. keeps thenosewarm
B. makes breathing easier
C. keeps thenosemoist
D. prevents carbondioxide from enteringthe body
E. filters dustfrom the air breathed in

8. Which ofthe followingis equal to onemetre?
A. 1 cm B. 10 cm C. 100 cm D. 500 cm
E. 1000 cm

9. Which ofthe following statements about feeding relationships isnot true?
A. Energyis transferred from one organismto another
B. A green plant is the basisof anyfood chain C. Bacteriafeed on dead organisms forenergy D. A carnivore feeds ongreen plants for energy E. Omnivores feed on both plants and animals

10. Inasimple machine, theforcethat is applied to enable work to be doneis known as
A. Lever B. Load C. Pivot D. Effort E. Hinge

11. Which ofthe following changes doesnot occurin agirlat theageof puberty?
A. Thebreastsdevelop
B. Thehipswiden
C. Menstruation
D. Theteeth becomes whiter
E. Hairgrows in thepubicarea

12. The fixed pointof alever at which turningtakes placeis the
A. pivot

B. effort
C. load
D. handle
E. machine

13. Which ofthe following mixtures can beseparated byfiltration?
A. Saltin water
B. Sugar in water C. Sand in water D. Oil in water
E. Omo in water

14. Theskin is madeup of
A. Onelayer B. Twolayers C. Threelayers D. Four layers E. Sixlayers

15. The forcewhichacts between planets and keeps them in theirorbits is called
A. electrical force
B. magnetic force
C. gravitational force
D. frictional force
E. elastic force

16. Which ofthe followingtypes of soil allows the fastest rate ofdrainage?
A. Clayeysoil B. Loamysoil C. Black soil D. Sandysoil E. Humus

17. Which ofthe followingis the percentagecomposition of oxygen in theair?
A. 0.03
B. 1
C. 21
D. 78
E. 98

18. Disposal ofsewageinto a riverwhich supplies water fordomesticuse maylead to an outbreak of
A. malaria
B. cholera
C. guineaworm
D. river blindness

E. tuberculosis

19. Theprocess bywhich anaphthaleneball(camphor) placed in a boxgets smallerin sizeis termed
A. Melting
B. Diffusion
C. Evaporation D. Sublimation E. Condensation

20. Which ofthe followingfood substances isnot oxidized duringrespiration?
A. Fattyacids
B. Amino acids
C. Glucose D. Cellulose E. Vitamins

21. Kerosene and petrol are obtained from crudeoilby
A. distillation
B. condensation
C. filtration
D. evaporation
E. decantation

22. Which ofthe following encourages the spread ofvenereal diseases?
A. Poor familyplanning
B. DrugAbuse
C. Mental illhealth
D. Parental wealth
E. Indiscriminate sexual intercourse

23. A torch light bulb lightsup when connected to adrycell. What typeof energyis obtained from the cell?
A. Chemical energy
B. Light energy
C. Potential energy D. Electrical energy E. Heat energy

24. Which ofthe followingis not asoil nutrient?
A. Hydrogen B. Nitrogen C. Potassium D. Calcium
E. Phosphorus

25. Which ofthe following organisms causes bilharziasis?

A. Tapeworm B. Blood fluke C. Blood worm D. Round worm E. Liver fluke

26. A pieceof stonesinksin waterbecause
A. its densityis thesame asthat ofwater
B. itis able to displaceits own weight of water
C. its densityis less than that of water
D. its densityisgreater thanthat ofwater
E. the watercontains air which allows the stoneto sink

27. Which ofthe followingis characteristic ofreflexaction
A. It happens slowly
B. It happens consciously
C. It takes a longpath D. It involves thinking E. It is automatic

28. All the followingaresenseorgans except the
A. eye B. brain C. ear
D. skin
E. tongue

29. A mixtureof raw starchand wateris best separated by
A. boiling
B. distillation C. decantation D. winnowing
E. crystallization

30. Which ofthe followingis a horizontal underground stem?
A. Cocoyam
B. Onion C. Carrot D. Yam
E. Ginger

31. Which ofthe followingis a physical change?
A. Heatingof sugar
B. Heatingof sulphur and iron filing
C. Boilingofwater

D. Burningof magnesiumribbon
E. Heatingof potassiumchlorate

32. Inan experiment in which avariegated leaf is used, which of thefollowingis proved to benecessaryfor photosynthesis?
A. Carbondioxide
B. Light
C. Chlorophyll
D. Water
E. Oxygen

33. Friction is definedas a forcewhich
A. accompanies motion B. acts againstmotion C. causes motion
D. makes motion easy
E. is created bymotion

34. Which ofthe followingisnot a function ofthe lens in the human eye?It
A. allows light rays to pass through it
B. refracts thelight rays passingthrough it
C. helps to focus theimageonto the retina
D. becomes thinner when focusingadistantobject
E. reflects part of thelight raysfallingon it.

35. Which ofthe following practices ina communitywillincreaseits environmental pollution?
A. Buildingof schools with workshops
B. Plantingof trees on largeareas of land
C. Depositingof household rubbish near a sourceofdrinkingwater
D. Removal ofsand and refuse from chokedgutters
E. buildingof an efficient undergroundsewagesystem

36. Smoke is an exampleof amixtureof
A. Gases
B. Liquids in gases C. Solids in liquids D. solids in gases
E. solids in solids

37. Which ofthe followingis the best method of preventingskin disease?
A. Theuse of perfume on theskin
B. Theuse of bleachingcream on theskin
C. Avoidingcontact with diseased person
D. keepingthe skin clean bywashingit regularly
E. Changingofclothes regularly

38. Which ofthe following has a different physical state from the others underordinaryconditions?
A. Zinc B. Lead C. Iron
D. Mercury
E. Aluminium

39. Heat from thesunreaches the earth by
A. conduction B. convection C. radiation
D. reflection
E. refraction

40. During an eclipse of themoon, the
A. Sun and the moon areononeside ofthe earth
B. Earth and the sun areononeside ofthe moon
C. Sun comes betweenearthand moon in astraight line D. Earth comes between sun and moon in astraight line E. Moon comes between sun and earth in astraight line




CLICK TO VIEW ANSWERS TO OBJECTIVES
August 1993

SCIENCESectionA

SOLUTIONS

OBJECTIVETEST

1. E. Gas, liquid and solid

2.
C.
washes awaythe top soil

3.
C.
37°C

4.
A.
Iron and Carbon

5.
B.
Add nitrogen to thesoil

6.
D.
Skin

7.
E.
filters dustfrom the air breathed in

8.
C.
100 cm

9.
D.
A carnivore feeds ongreen plants for energy

10.
D.
Effort

11.
D.
Theteeth becomes whiter

12.
A.
pivot

13.
C.
Sand in water

14.
B.
Twolayers

15.
C.
gravitationalforce

16.
D.
Sandysoil

17.
C.
21

18.
B.
cholera

19.
D.
Sublimation

20. E. Vitamins

21.
A.
distillation

22.
E.
Indiscriminate sexual intercourse

23.
D.
Electrical energy

24.
A.
Hydrogen

25.
B.
Blood fluke

26.
D.
its densityisgreater thanthat ofwater

27.
E.
It is automatic

28.
B.
brain

29.
C.
decantation

30.
E.
Ginger

31.
C.
Boilingofwater

32.
C.
Chlorophyll

33.
B.
acts againstmotion

34.
E.
reflects part of thelight raysfallingon it.

35.
C.
Depositingof household rubbish near a sourceofdrinkingwater

36.
D.
solids in gases

37.
D.
keepingthe skinclean bywashingit regularly

38.
D.
Mercury

39.
C.
radiation

40.
D.
Earth comes between sun and moon in astraight line