JSS3 Second Term Exam Questions on Basic Science [From SSIA]

You’re welcome to our school exams series where we provide you with termly examination questions in different subjects, from different schools. In today’s post, we will focus on Basic Science exam questions and our source will be Sure Success International Academy [SSIC]. We will cover JSS3 second term exam questions on Basic Science and provide their answers at the end. Remember to use the comments sections if you have questions, and don’t forget to join our Free Online Tutorial Classes on Facebook. (Like and Follow Page)

JSS3 Second Term Exam Questions on Basic Science [SSIC]

In Sure Success International Academy [SSIC], JSS3 Second Term Examination Questions on Basic Science are normally divided into two broad sections:

• Section A
• Section B

The first section, namely, Section A is the objective test, and students are expected to attempt all questions in the section. Section B is the theory part, and students are expected to follow the given instructions and answer the specified number of questions.

Note that what you have below are JSS3 Basic Science Second Term Examination Past Questions (BECE MOCK) made available to assist students in their revision for 2nd term/BECE examinations and also teachers in structuring standard termly examinations.

SURE SUCCESS INTERNATIONAL ACADEMY (SSIA), PORT HARCOURT.
Term: 2nd Term Examination
Class: JSS 3
Subject: Basic Science
Duration: 2 hrs

Any form of examination malpractice may lead to a repeat of the subject or suspension. Don’t get involved.

SECTION A: Objectives

Attempt All the Questions in this section by choosing from the options lettered A—D.

1. The intelligent guess made by scientist to select the best option in known as _________
(a) Law                   (b) Theory
(c) Hypothesis        (d) Principle

2. Which of these is not a branch of science?
(a) Biochemistry        (b) History
(c) Biology                 (d) Anatomy

3. Plant differs from animal because it _________
(a) Respires         (b) Grows
(c) Moves            (d) Makes its food

4. Small green coloured structure located in the cytoplasm of a plant cell is called _________
(a) Cellulose          (b) Chloroplast
(c) Protoplasm      (d) Cell membrane

5. Which of these is a mode of nutrition in plants?
(a) Heterotrophism
(b) Parasitism
(c) Commensalism
(d) Autotrophism

6. Which of the following is an animal?
(a) Mucor        (b) Rhizopus
(c) Man           (d) Potato

7. Oxygen is used up in plant during photosynthesis. (True / False)

8. On stepping into a sharp pin on the ground, Nkechi quickly raised her leg away. This action shows a characteristic of living things called
(a) Excretion        (b) Irritability
(c) Growth           (d) Nutrition

9. Living cells are first discovered in the year _________
(a) 1960        (b) 1961
(c) 1665         (d) 1605

10. Which of the following is not a food item?
(a) Milk            (b) Spinach
(c) Alekwu        (d) Rice

11. Which of these vitamins is important for blood clotting?
(a) Vitamin K       (b) Vitamin A
(c) Vitamin D       (d) Vitamin C

12. Animal that carries and transmits disease-causing microorganisms from one person to another is called _________
(a) Pathogen      (b) Mosquito
(c) Vector           (d) Bed bug

13. Which of these is a water borne disease?
(a) Tuberculosis     (b) Tetanus
(c) Cholera             (d) Malaria

14. The chemical added to water to kill disease-causing microorganisms is called
(a) Alum             (b) Oxygen
(c) Kerosene       (d) Chlorine

15. Resistance conferred by antibodies against future attack by disease-causing microorganism is
(a) Immunity        (b) Antigen
(c) Antibody         (d) Utility

16. Which of the following diseases is immunization done through the mouth?
(a) Polio             (b) Cholera
(c) Tetanus         (d) Tuberculosis

17. The causative organism of syphilis is called
(a) Plasmodium specie
(b) Treponema pallidum
(c) Vibrio cholerae
(d) Chlamydia trachomatis

18. The habit of taking drugs which are not recommended by a qualified medical personnel is called
(a) Drug use
(b) Self medication
(c) Drug abuse
(d) Diagnosis

19. Which of these is a triatomic molecule?
(a) Oxygen       (b) Hydrogen
(c) Ozone         (d) Sodium

20. How many atoms are contained in three molecules of water?
(a) 3          (b) 6
(c) 9          (d) 5

21. The process of solid changing directly to gas without undergoing liquid state is termed
(a) Evaporation       (b) Diffusion
(c) Sublimation       (d) Osmosis

22. Which of these has neither definite shape nor volume?
(a) Liquid         (b) Geloid
(c) Solid           (d) Gas

23. Carbon (IV) oxide is removed from the atmosphere by
(a) Photosynthesis
(b) Feeding
(c) Burning
(d) Plant

24. The main source of earth’s energy is
(a) Food        (b) Plant
(c) Sun          (d) Animal

25. The process by which objects float as a result of no weight is termed _________
(a) Gravitation
(b) Force
(c) Weightlessness
(d) Viscosity

26. Chemical substance secreted by the white blood cells to fight diseases in the body is called _________
(a) Antibody    (b) Antigen
(c) Toxin           (d) Immune system

27. Liquid air pollutant is _________
(a) Smoke
(b) Smog
(c) Acid rain
(d) Dust particle

28. The place which an organism lives as its natural home is known as _________
(a) Air           (b) Habitat
(c) Niche      (d) Arboreal

29. The irreversible increase in size of an organism is best described as _________
(a) Development     (b) Growth
(c) Maturity             (d) Exponential

30. Change whereby a new substance is produced which is not easily reversible is _________ change.
(a) Physical          (b) Chemical
(c) Temporary      (d) Reversible

31. H₂ + O₂ is an example of change.
(a) Chemical
(b) Physical
(c) Irreversible
(d) None of the above

32. Substance which dissolves in another substance is called _________
(a) Solute
(b) Solution
(c) Solvent

33. Thick connective tissue which holds bones together is _________
(a) Muscle          (b) Cartilage
(c) Ligament       (d) Skeleton

34. Place in the body where different bones come together is _________
(a) Ligament
(b) Skeleton
(c) Fibula

35. The longest bone in the human is found in
(a) Femur          (b) Tibia
(c) Humerus      (d) Mouth

36. Food gets into the blood stream through a special structure called
(a) Uterus
(b) Villus
(c) Small intestine

37. Mouth enzyme during food digestion is called
(a) Pepsin
(b) Lipase
(c) Amylase

38. Blood vessel which carries blood from the heart to different parts is
(a) Artery
(b) Capillary
(c) Cone

39. The period from conception to birth is called
(a) Gestation        (b) Menstruation
(c) Ovulation        (d) Trimester

40. The monthly release of matured egg in female is described as
(a) Ovulation
(b) Conception
(c) Egg maturation
(d) Menstruation

41. How many seconds are there in 2½ hours?
(a) 1,800 seconds        (b) 7,200 seconds
(c) 9,000 seconds        (d) 3,600 seconds

42. The S.I. unit of work is
(a) Metre        (b) Centimetre
(c) Watt          (d) Joule

43. Certain gas is exposed to a lighted splint making a pop sound. Therefore, the gas must be
(a) Oxygen         (b) Helium
(c) Hydrogen      (d) Sodium

44. The percentage composition of oxygen in air is approximately
(a) 78%
(b) 0.04%
(c) 100%

45. Helium and hydrogen are used to fill balloon because they are
(a) Non-toxic     (c) Light
(d) Liquid          (b) Gases

46. Which of the following has potential energy?
(a) Moving on the road
(b) Bird flying in air
(c) Stone placed on a table

47. An object of mass 40g fell from a height at a velocity of 4ms⁻¹. Calculate its kinetic energy.
(a) 0.32J
(b) 0.04J
(c) 0.08J

48. Calculate the work done when a force of 4 Newtons moves an object through a distance of 3 meters along the direction of the force.
(a) 12J          (b) 5J
(c) 12N         (d) 1J

49. Calculate the force in newtons of a car of mass 30kg accelerating at 4m/s².
(a) 120         (b) 22
(c) 19           (d) 10

50. The origin of enzyme is
(a) Food
(b) Metal
(c) Non-living thing
(d) Living thing

51. Thick liquid creamy food in the stomach after digestion is referred to as
(a) Bud        (b) Churn
(c) Chyle      (d) Chyme

52. The type of metabolic reaction that involves building up of complex substance is known as
(a) Catabolism      (b) Glycogen
(c) Anabolism        (d) Protein

53. Which of the following comes from animal?
(a) Groundnut     (b) Rubber
(c) Ivory               (d) Cotton

54. Which of these is the most suitable for preserving milk?
(a) Bottling
(c) Pasteurization
(d) freezing

55. Solid mineral used in making paint is
(a) Silver       (b) Kaolin
(c) Gold        (d) Lead

56. Ray of light that is thrown back is called
(a) Reflected ray
(b) Normal ray
(c) Incident ray
(d) Opaque

57. The change in speed or direction of light ray as it travels from one boundary to another is termed
(a) Reflection
(b) Diversion
(c) Refraction
(d) None of the above

58. Sound heard after reflection is called
(a) Music           (b) Noise
(c) Vibration      (d) Echo

59. The molecular formula of ammonia is
(a) CH₄          (b) NH₃
(c) NaOH       (d) C₂H₆

60. Which of these is a group zero (0) element?
(a) Potassium        (d) Calcium
(b) Argon              (c) Silicon

SECTION B: Essay

INSTRUCTION – Attempt all the questions in this section.

1a. Define the following terms:
(i) Element
(ii) Mixture
(iii) Virus
b. Write the atomic number of the following:
(i) Neon
(ii) Carbon
(iii) Sodium
(iv) Beryllium
c. Write the chemical symbols of these elements:
(i) Sodium
(ii) Mercury
(iii) Lead
(iv) Lithium
d. Aluminium reacts with oxygen to form a compound. Write the molecular formula of the compound produced and name the compound formed.

2. Construct the periodic table of the first 20 elements showing their respective atomic number

3. Calculate the number of atoms in the following
A. 2NaCl
B. 3H₂O₄

4. Balance these equations:
a. K₂ + H₂O → KOH + H₂
b. Na + H₂ → NaH

5. Define these
i. Heredity
ii. Atom
iii. Desertification

Answers to JSS3 Second Term Exam Questions on Basic Science (From SSIA)

Answers to Section A (Objective Test)

The following table gives the correct answers to the objective section of JSS3 second term exam questions on Basic Science. If you are using a mobile device, hold the table and scroll to the right or left for a complete view.

So here you have the answers to the objective section of JSS3 second term exam questions on Basic Science. Use the comments section to let me know if you have any questions you would want me to clarify or discuss further.

Answers to Section B

1a. Definitions

(i) Element:
An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

(ii) Mixture:
A mixture is a combination of two or more substances that are physically combined and can be separated by physical means. Each component retains its individual properties.

(iii) Virus:
A virus is a microscopic infectious agent that can only reproduce inside the living cells of a host organism. It is neither a living organism nor a non-living substance.

1b. Atomic Numbers

(i) Neon, 10
(ii) Carbon, 6
(iii) Sodium, 11
(iv) Beryllium, 4

1c. Chemical Symbols

(i) Sodium, Na
(ii) Mercury, Hg
(iii) Lead, Pb
(iv) Lithium, Li

1d. Aluminium + Oxygen Reaction

– Molecular Formula: Al₂O₃
– Name of Compound: Aluminium oxide

2. Periodic Table of the First 20 Elements

1 Hydrogen H
2 Helium He
3 Lithium Li
4 Beryllium Be
5 Boron B
6 Carbon C
7 Nitrogen N
8 Oxygen O
9 Fluorine F
10 Neon Ne
11 Sodium Na
12 Magnesium Mg
13 Aluminium Al
14 Silicon Si
15 Phosphorus P
16 Sulfur S
17 Chlorine Cl
18 Argon Ar
19 Potassium K
20 Calcium Ca

3. Number of Atoms

A. 2NaCl
– Each NaCl contains 2 atoms (Na and Cl)
– So, 2NaCl = 2 × 2 = 4 atoms

B. 3H₂O₄
– Each H₂O₄ contains 6 atoms (2 Hydrogen + 4 Oxygen)
– So, 3H₂O₄ = 3 × 6 = 18 atoms

4. Balancing Equations

a. K₂ + H₂O → KOH + H₂
Balanced:
2K + 2H₂O → 2KOH + H₂

b. Na + H₂ → NaH
Balanced:
2Na + H₂ → 2NaH

5. Definitions

i. Heredity:
Heredity is the passing of genetic traits from parents to their offspring through genes.

ii. Atom:
An atom is the smallest unit of an element that retains the chemical properties of that element.

iii. Desertification:
Desertification is the process by which fertile land becomes desert due to drought, deforestation, or inappropriate agriculture.

It’s a wrap!

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