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BECE Basic Science 2024 Objective Past Questions

All 120 questions from the Basic Education Certificate Examination (Junior WAEC) (BECE) Basic Science 2024 Objective paper, with the correct answer and a full explanation for each. Free, no signup needed.

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Basic Science 2024 Objective — Question 2

The air pollutant produced by an incomplete combustion of fuel is ____.

  • A. Carbon (II) oxideCorrect
  • B. Carbon (IV) oxide
  • C. Hydrogen peroxide
  • D. Hydrogen sulphide
  • E. Sulphur (II) oxide

Explanation

Incomplete combustion gives carbon (II) oxide (carbon monoxide).

Basic Science 2024 Objective — Question 3

Which of the following measures is not used to control pollution?

  • A. Conservative use of chemicals.
  • B. Indiscriminate waste disposal.Correct
  • C. Proper legislation.
  • D. Proper sewage disposal.
  • E. Recycling of waste materials.

Explanation

Indiscriminate waste disposal causes pollution.

Basic Science 2024 Objective — Question 9

The diagram below represents various positions of a swinging pendulum bob. At what position is the kinetic energy of the bob at maximum?

Diagram for question 9
  • A. i
  • B. ii
  • C. iiiCorrect
  • D. iv
  • E. v

Explanation

Kinetic energy is greatest at the lowest point of the swing (position iii).

Basic Science 2024 Objective — Question 10

What is the work done by gravity in joules, when a boy drops a stone of mass 22kg from a height of 12m? [g = 10 ms⁻²]

  • A. 18.33
  • B. 26.40
  • C. 44.00
  • D. 142.00
  • E. 2640.00Correct

Explanation

Work = mgh = 22 x 10 x 12 = 2640 J.

Basic Science 2024 Objective — Question 11

The earth rotates about its axis through the ____ poles.

Diagram for question 11
  • A. North and East
  • B. North and SouthCorrect
  • C. North and West
  • D. South and East
  • E. South and West

Explanation

The axis runs through the North and South poles.

Basic Science 2024 Objective — Question 12

Use the diagram below to answer the next two questions. The organism represented above belongs to which group of animals?

  • A. AmphibianCorrect
  • B. Arboreal
  • C. Aves
  • D. Pisces
  • E. Reptilian

Explanation

The animal is a frog, an amphibian.

Basic Science 2024 Objective — Question 14

An example of moderately hazardous chemical is ____.

  • A. hydrogen sulphide
  • B. mercury vapour
  • C. methylated spiritCorrect
  • D. potassium hydroxide
  • E. sodium hydroxide

Explanation

Methylated spirit is flammable but only moderately hazardous.

Basic Science 2024 Objective — Question 16

A body of mass 60 g moves with a velocity 13 ms⁻². Calculate its kinetic energy in joule.

  • A. 4.62
  • B. 5.07Correct
  • C. 47.00
  • D. 73.00
  • E. 780.00

Explanation

KE = 1/2 mv² = 0.5 x 0.06 x 13² = 5.07 J.

Basic Science 2024 Objective — Question 17

Calculate the mass in grammes of a ball at a height 6 m above the ground with a potential energy of 80 J. [g = 10 ms⁻²]

  • A. 0.75
  • B. 1.33Correct
  • C. 20.00
  • D. 96.00
  • E. 140.00

Explanation

PE = mgh, so m = 80 ÷ (10 x 6) = 1.33.

Basic Science 2024 Objective — Question 18

The change of state from liquid to gas at any temperature is known as ____.

  • A. boiling
  • B. condensation
  • C. evaporationCorrect
  • D. freezing
  • E. vaporization

Explanation

Evaporation happens at any temperature; boiling only at the boiling point.

Basic Science 2024 Objective — Question 19

The heat transfer from a source of fire to a person nearby is ____.

  • A. conduction
  • B. convection
  • C. evaporation
  • D. radiationCorrect
  • E. vaporization

Explanation

Heat reaches a person nearby by radiation.

Basic Science 2024 Objective — Question 20

The constituents of crude oil are separated by the process of ____.

  • A. chromatography
  • B. crystallization
  • C. destructive distillation
  • D. fractional distillationCorrect
  • E. sedimentation

Explanation

Crude oil is separated into fractions by fractional distillation.

Basic Science 2024 Objective — Question 21

The first scientific study of heredity was carried out by ____.

  • A. Charles Darwin
  • B. Francis Galton
  • C. Gregory MendelCorrect
  • D. James Watson
  • E. Michael T. Gabbett

Explanation

Gregor Mendel studied heredity in pea plants.

Basic Science 2024 Objective — Question 22

The conversion of grassland into arid land is known as ____.

  • A. afforestation
  • B. agroforestry
  • C. deforestation
  • D. degradation
  • E. desertificationCorrect

Explanation

Turning grassland into desert-like land is desertification.

Basic Science 2024 Objective — Question 23

The following are government policies aimed at controlling drought and desertification except ____.

  • A. National Agricultural Policy.
  • B. National Conservative Policy.
  • C. National Energy Policy.
  • D. National Policy on Education.Correct
  • E. National Policy on Environment.

Explanation

The Policy on Education does not target drought or desertification.

Basic Science 2024 Objective — Question 26

The bending of light as it passes from one transparent substance into another is ____.

  • A. dispersion
  • B. diversion
  • C. illumination
  • D. reflection
  • E. refractionCorrect

Explanation

Refraction.

Basic Science 2024 Objective — Question 29

What disease is caused by long time exposure of the body to radioactive elements?

  • A. CancerCorrect
  • B. Diabetes
  • C. Meningitis
  • D. Typhoid
  • E. Ulcer

Explanation

Radiation exposure can cause cancer.

Basic Science 2024 Objective — Question 30

Skill acquisition is important because it ____.

  • A. aids internet fraud
  • B. consumes energy
  • C. discourages empowerment
  • D. increases dependence on government
  • E. produces manpower need of the societyCorrect

Explanation

Skills supply the manpower the society needs.

Basic Science 2024 Objective — Question 32

Which of the following is an objective of recreational activities? To ____.

  • A. choose more preferred games.
  • B. eliminate boredom and reduce tension.Correct
  • C. know the health status of individuals.
  • D. prepare athletics for competition.
  • E. study body types and skills.

Explanation

Recreation relieves boredom and tension.

Basic Science 2024 Objective — Question 34

A gymnast is a person who ____

  • A. can perform track activities.
  • B. perform stunts, rope and chair exercise.Correct
  • C. perform warm-up exercise before an activity.
  • D. specializes in different games.
  • E. specializes in physical education.

Explanation

A gymnast performs stunts and apparatus exercises such as rope and chair work.

Basic Science 2024 Objective — Question 37

The ability of an individual to control and adjust his mood is ____ fitness.

  • A. emotionalCorrect
  • B. mental
  • C. physical
  • D. social
  • E. total

Explanation

Controlling one's mood is emotional fitness.

Basic Science 2024 Objective — Question 38

What is the distance between the take off board and landing pit in long jump?

  • A. 1.0 mCorrect
  • B. 1.5 m
  • C. 2.0 m
  • D. 2.5 m
  • E. 3.0 m

Explanation

The landing pit begins about 1 m from the take-off board.

Basic Science 2024 Objective — Question 39

The abnormal in body fat as a result of excessive consumption of food and drinks is ____.

  • A. cancer
  • B. diabetes
  • C. kwashiorkor
  • D. marasmus
  • E. obesityCorrect

Explanation

Excess body fat from over-eating is obesity.

Basic Science 2024 Objective — Question 40

Which of the following is not a component of physical fitness?

  • A. Balance
  • B. Coordination
  • C. Power
  • D. Speed
  • E. WeightCorrect

Explanation

Weight is not a component of physical fitness.

Basic Science 2024 Objective — Question 44

Which of the following exercises is for muscular endurance?

  • A. Hand grip
  • B. Static balance
  • C. Static push
  • D. Truck extensionCorrect
  • E. Weight lifting

Explanation

Trunk extension repeated many times builds muscular endurance.

Basic Science 2024 Objective — Question 47

A programme designed to acquire attitude, knowledge and habits to improve wellbeing describes ____ education.

  • A. adapted
  • B. drug
  • C. healthCorrect
  • D. physical
  • E. safety

Explanation

That is the definition of health education.

Basic Science 2024 Objective — Question 48

Recreational activities engaged in voluntarily for fun and enjoyment are carried out at ____ time.

  • A. leisureCorrect
  • B. lesson
  • C. lunch
  • D. rest
  • E. worship

Explanation

Recreation takes place in leisure time.

Basic Science 2024 Objective — Question 49

In performing forward roll, you will start in a ____ position.

  • A. lying
  • B. rolling
  • C. sitting
  • D. squattingCorrect
  • E. standing

Explanation

A forward roll starts from a squatting position.

Basic Science 2024 Objective — Question 50

Which of the following is not a determinant of health?

  • A. EducationCorrect
  • B. Environment
  • C. Gender
  • D. Heredity
  • E. Lifestyle

Explanation

Environment, heredity and lifestyle are determinants of health.

Basic Science 2024 Objective — Question 51

Which of the following skills is used to halt a ball in hockey game?

  • A. Dribbling
  • B. FieldingCorrect
  • C. Flicking
  • D. Gripping
  • E. Hitting

Explanation

Stopping or fielding the ball halts it.

Basic Science 2024 Objective — Question 52

An individual who uses specific exercises for body development is a/an ____.

  • A. Anthropologist
  • B. Nutritionist
  • C. Physiologist
  • D. PhysiotherapistCorrect
  • E. Psychologist

Explanation

A physiotherapist prescribes specific exercises for the body.

Basic Science 2024 Objective — Question 54

The act of putting the ball into play after it has gone out through the sideline in a football game is ____.

  • A. dribbling
  • B. goal-kick
  • C. heading
  • D. shooting
  • E. thrown-inCorrect

Explanation

A throw-in restarts play after the ball leaves the sideline.

Basic Science 2024 Objective — Question 55

The major function of carbohydrates in the body is to ____.

  • A. conserve heat
  • B. increase blood
  • C. maintain the eyes
  • D. produce energyCorrect
  • E. repair the body

Explanation

Carbohydrates are the body's main source of energy.

Basic Science 2024 Objective — Question 58

When a pointed object makes a deep hole in the body tissue, it is ____ wound.

  • A. abrasion
  • B. confused
  • C. incised
  • D. lacerated
  • E. puncturedCorrect

Explanation

A pointed object causes a punctured wound.

Basic Science 2024 Objective — Question 60

Which of the following countries won the 2024 African cup of Nation?

  • A. Cameroon
  • B. Ghana
  • C. Ivory CoastCorrect
  • D. Nigeria
  • E. South Africa

Explanation

Ivory Coast won the 2023 AFCON, played in January-February 2024.

Basic Science 2024 Objective — Question 61

The right end view of the orthographic projection below is ____.

Diagram for question 61
  • A. (see diagram, option A)Correct
  • B. (see diagram, option B)
  • C. (see diagram, option C)
  • D. (see diagram, option D)
  • E. (see diagram, option E)

Explanation

Both the elevation and the plan show a single step edge, so the end view is an L-shape with the tall part on the side where the plan shows the higher level.

Basic Science 2024 Objective — Question 62

From the drawing below, if X = 45° and Y = 45°; the angles are said to be ____.

Diagram for question 62
  • A. acute
  • B. complementaryCorrect
  • C. obtuse
  • D. reflex
  • E. supplementary

Explanation

X + Y = 90°, so the angles are complementary.

Basic Science 2024 Objective — Question 63

Which of the axes below is oblique?

Diagram for question 63
  • A. (see diagram, option A)
  • B. (see diagram, option B)
  • C. (see diagram, option C)
  • D. (see diagram, option D)
  • E. (see diagram, option E)Correct

Explanation

An oblique axis set has one vertical, one horizontal and one receding axis inclined at an angle (option E).

Basic Science 2024 Objective — Question 64

Which of the following drawing instruments is used for transferring measurement?

  • A. French curves
  • B. Pair of compasses
  • C. Pair of dividersCorrect
  • D. Set square
  • E. Tee square

Explanation

Dividers transfer measurements.

Basic Science 2024 Objective — Question 65

Which of the following scales will produce the largest view of an object?

  • A. 1:1
  • B. 2:1
  • C. 3:4
  • D. 5:2Correct
  • E. 7:3

Explanation

Compare the ratios: 5:2 = 2.5, 7:3 = 2.33, 2:1 = 2; 5:2 is the largest enlargement.

Basic Science 2024 Objective — Question 66

The tee square is a drawing instrument used for ____.

  • A. bisecting lines
  • B. constructing circles
  • C. drawing arcs
  • D. drawing horizontal linesCorrect
  • E. measuring angles

Explanation

A tee square is used to draw horizontal lines.

Basic Science 2024 Objective — Question 69

In board practice, tee square can be used in conjunction with set square to draw ____ line.

  • A. curve
  • B. horizontal
  • C. receding
  • D. verticalCorrect
  • E. wavy

Explanation

The set square slides along the tee square to draw vertical lines.

Basic Science 2024 Objective — Question 72

Projects to be mass produced must be accompanied with the following except ____.

  • A. cutting list
  • B. materials
  • C. orthographic views
  • D. preliminary sketchesCorrect
  • E. prototype

Explanation

Preliminary sketches belong to the early design stage and are not needed for mass production.

Basic Science 2024 Objective — Question 74

The machine used in cutting timber across the grain is ____.

  • A. band saw
  • B. circular sawCorrect
  • C. surfacer
  • D. thicknesser
  • E. wood lathe

Explanation

A circular saw is used for cross-cutting timber.

Basic Science 2024 Objective — Question 75

Which of the following is a property of wood?

  • A. Brittleness
  • B. Ductility
  • C. ElasticityCorrect
  • D. Malleability
  • E. Rigidity

Explanation

Wood is elastic; ductility and malleability belong to metals.

Basic Science 2024 Objective — Question 76

Which of the following equipment is classified as an impelling tool?

  • A. G-clamp
  • B. Hack saw
  • C. HammerCorrect
  • D. Hand plane
  • E. Spoke shave

Explanation

Impelling tools drive by striking, such as a hammer.

Basic Science 2024 Objective — Question 79

Simple maintenance carried out on a television is ____.

  • A. adjustment
  • B. dustingCorrect
  • C. greasing
  • D. oiling
  • E. polishing

Explanation

Dusting is the simple routine maintenance for a television.

Basic Science 2024 Objective — Question 80

Which of the following equipment is non-hydraulically operated device?

  • A. Bicycle pumpCorrect
  • B. Bulldozer
  • C. Car brake
  • D. Car jack
  • E. Fork lift

Explanation

A bicycle pump works on air pressure, not hydraulics.

Basic Science 2024 Objective — Question 81

What is the main function of a Global Positioning System device? To ____

  • A. capture photographs.
  • B. check update of the device operating system.
  • C. play music.
  • D. provide direction and users location.Correct
  • E. send text messages.

Explanation

GPS gives direction and the user's location.

Basic Science 2024 Objective — Question 82

The first action to be taken in a case of severe bleeding is to ____

  • A. apply pressure with clean cloth.Correct
  • B. cover surface with clean cloth.
  • C. give the victim oxygen.
  • D. give the victim water.
  • E. place the victim in recovery position.

Explanation

Direct pressure stops the bleeding first.

Basic Science 2024 Objective — Question 84

Which of the following materials is usually placed in a first aid box?

  • A. PlasterCorrect
  • B. Scanner
  • C. Stethoscope
  • D. Syringe
  • E. Thermometer

Explanation

Plaster is a standard first aid item.

Basic Science 2024 Objective — Question 86

The metal work operation that is not required for making metal stools is ____.

  • A. bending
  • B. folding
  • C. joining
  • D. knurlingCorrect
  • E. shearing

Explanation

Knurling is for making grips on round parts, not for a stool.

Basic Science 2024 Objective — Question 88

The purpose of resin flux in soldering operation is to ____

  • A. clean the metal surface.Correct
  • B. enable the metal joint to melt.
  • C. improve joints contact.
  • D. improve mechanical strength.
  • E. stop the flow of molten solder.

Explanation

Flux cleans the metal surface and prevents oxidation.

Basic Science 2024 Objective — Question 92

Computers can be classified based on the following except ____.

  • A. Generation
  • B. Purpose
  • C. ShapeCorrect
  • D. Size
  • E. Type

Explanation

Computers are classified by generation, purpose, size and type, not shape.

Basic Science 2024 Objective — Question 95

Which of the following storage devices is very slow in operation?

  • A. Cache
  • B. Flash drive
  • C. Floppy diskCorrect
  • D. Hard disk
  • E. Register

Explanation

A floppy disk is the slowest of these.

Basic Science 2024 Objective — Question 98

Which of the following is a temporary storage location?

  • A. Flash drive
  • B. Hard disk
  • C. Optical disc
  • D. Random Access MemoryCorrect
  • E. Read Only Memory

Explanation

RAM loses its contents when power is off.

Basic Science 2024 Objective — Question 100

What is the safest way to open an e-mail attachment from an unknown sender?

  • A. Confirm the contents before opening.
  • B. Download and scan with an antivirus software.
  • C. Forward to a friend to open it.
  • D. Ignore the email and delete it unopened.Correct
  • E. Open it directly in recipient's email.

Explanation

Never open attachments from unknown senders.

Basic Science 2024 Objective — Question 101

The abbreviation PDA stands for ____.

  • A. Personal Digital Assistance
  • B. Personal Digital AssistantCorrect
  • C. Personnel Digital Administrator
  • D. Program Device Application
  • E. Program Digital Asset

Explanation

PDA means Personal Digital Assistant.

Basic Science 2024 Objective — Question 102

Which of the following is a logical operator in BASIC programming language?

  • A. +
  • B. -
  • C. ANDCorrect
  • D. *
  • E. <

Explanation

AND is a logical operator; the others are arithmetic or relational.

Basic Science 2024 Objective — Question 104

The first machine that was run by a program is ____.

  • A. Babbage's Difference Engine
  • B. Burroughs' Machine
  • C. Electronic Numerical Integrator and Calculator
  • D. Jacquard's LoomCorrect
  • E. Universal Automatic Computer

Explanation

Jacquard's loom was controlled by punched-card programs.

Basic Science 2024 Objective — Question 106

To save an existing document with a different file name, ____

  • A. click "Save As" on the file menu.Correct
  • B. click "Save As" on the standard toolbar.
  • C. click "Save" in the file menu.
  • D. click the save icon on the standard toolbar.
  • E. press Ctrl + S on the keyboard.

Explanation

Save As on the File menu allows a new name.

Basic Science 2024 Objective — Question 108

Which of the following technologies marked the emergence of fourth generation computers?

  • A. Capacitor
  • B. ChipCorrect
  • C. Punch card
  • D. Transistor
  • E. Vacuum tube

Explanation

Fourth generation computers use microprocessor chips (integrated circuits).

Basic Science 2024 Objective — Question 111

Which of the following components determines the speed of a computer system?

  • A. Hard disk
  • B. Motherboard
  • C. Operating system
  • D. Random Access MemoryCorrect
  • E. Read Only Memory

Explanation

RAM size strongly affects how fast the computer runs.

Basic Science 2024 Objective — Question 112

A typical computer hardware is made up of ____ units.

  • A. arithmetic and central processing
  • B. central processing and control
  • C. control and processing
  • D. peripheral and control
  • E. system and peripheralCorrect

Explanation

Hardware consists of the system unit and peripheral units.

Basic Science 2024 Objective — Question 113

Which of the following is the correct order of how a computer works?

  • A. Input → Output → Process → Storage
  • B. Input → Process → Output → StorageCorrect
  • C. Output → Storage → Process → Input
  • D. Process → Output → Storage → Input
  • E. Storage → Input → Process → Output

Explanation

Data goes in, is processed, then output and stored.

Basic Science 2024 Objective — Question 114

Which of the following devices converts analogue to digital signals and vice versa?

  • A. Analyzer
  • B. Bluetooth
  • C. Compiler
  • D. Infrared
  • E. ModemCorrect

Explanation

A modem modulates and demodulates signals.

Basic Science 2024 Objective — Question 116

Which of the following programs is specifically developed for the purpose of doing harm to computers?

  • A. Antivirus
  • B. Compiler
  • C. Google Chrome
  • D. MalwareCorrect
  • E. Mozilla Firefox

Explanation

Malware is built to harm computers.

Basic Science 2024 Objective — Question 118

The science that attempts to create computers and softwares with human capabilities is ____ intelligence.

  • A. artificialCorrect
  • B. nanotechnology
  • C. natural
  • D. scientific
  • E. simulation

Explanation

Artificial intelligence.

Basic Science 2024 Objective — Question 119

Analysing data and choosing softwares for an organisation is the responsibility of a ____.

  • A. computer engineer
  • B. computer operator
  • C. database administrator
  • D. software developer
  • E. system analystCorrect

Explanation

A system analyst studies needs and selects software.

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