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Basic Science Second Term Examination Questions 2019/2020 Session – Junior Secondary School (JSS 1, JSS 2, JSS 3)





SUBJECT:    BASIC SCIENCE                      CLASS:  J.S.S 1


  1. All these are examples of renewable energy except  (a) water  (b) sun  (c) moon  (d) wind
  2. The following are consequences of STI except  (a) infertility  (b) gonorrhea  (c) mental illness  (d) malaria
  3. Causes of water pollution are all these except  (a) soil spillage  (b) sewage  (c) oxygen                     (d) fertilizer
  4. Which of these is not a source of energy?  (a) coal  (b) smoke  (c) petroleum (d) wood
  5. Abestor and cement dust are responsible for _____pollution   (a) air  (b) water  (c) land             (d) noise
  6. The body fluid through which HIV/AIDS can be transmitted does NOT include  (a) urine  (b) semen
  7. The following are examples of biodegradable materials except  (a) banana  (b) nylon                     (c) orange peels  (d) yam peeling
  8. In your pressing iron, electrical energy is converted to _____energy  (a) sound  (b) chemical  (c) heat  (d) light
  9. In radio, electrical energy is converted to _____energy  (a) heat  (b) light,  (c) sound               (d) mechanical energy
  10. One of these is an example of non-renewable energy  (a) petrol  (b) water  (c) wind  (d) sun
  11. HIV/AIDS is transmitted through the following except  (a) use of contaminated needles and syringes  (b) mother to child transmission  (c) unprotected sexual intercourse  (d)using the same toilet.
  12. One of these is NOT an example of STI’s (a) gonorrhea  (b) Chlamydia  (c) Ebola                (d) syphilis
  13. All of these are soil pollutants except  (a) agriculture  (b) chemical  (c) irrigation  (d) carbon monoxides
  14. Which of these is not found in the male reproductive system?  (a) penis  (b) scrotum  (c)uterus  (d) testes
  15. Which of these is NOT an example of protein?  (a) Egg  (b) fish  (c) Maize  (d) Milk


  1. The substance and energy that cause pollution are called __________________
  2. ______________is a cause of air pollution
  3. Proper maintenance of machinery, motor vehicles is control of ________pollution
  4. HIV is transmitted through ____________________
  5. Energy due to motion is known as __________________________

SECTION C:  Answer four (4) questions from this section.

1a.       What is environmental pollution? (1mk)

b.         State 2 effects of water pollution (2mks)

c.         Mention 3 major causes of air, water and soil pollution (3mks)

2a.       Give the meaning of the following

(i)         STI        (ii)      HIV          (iii) AIDS   

(iv)       Define STIs

b.         Mention 2 mode of transmission of HIBV/AIDS  (2mrks)

c.         State 2 ways you can prevent HIS/AIDS (2mks)

d.         Give 2 other examples of STI apart from HIV/AIDS (2mrks)

3a.       What is energy? (1mk)

b.         Mention 3 forms of energy (3mks)

c.         What is the main source of energy (1mk)

d.         Explain the energy transfer in the following

(i)         television   (ii) torch light   (iii)  Generator  3mks

e.         Differentiate between renewable and non-renewable energy

4a.       State 3 uses of energy

b.         Highlight 3 ways energy generation affects quality of life.

c.         Give 2 examples each of renewable and non renewable energy (4mks)

5a.       How do you care for or support people living with HIV? (2mks)

5b.       Mention 3 body fluid in which HIV can be found (3mrks)

c.         Group these statements under myths and facts of HIV/AIDS (5mrks)

i.          Anyone can get AIDS

ii.         If you hug someone with AIDS you can get HIV

iii.        You can contact HIV from a toilet seat

iv.        You can by looking know, whether someone is HIV positive

v.         All blood meant for transfusion must be screened for HIV.





SUBJECT:    BASIC SCIENCE                                                     CLASS:  J.S.S 2


  1. A working electric fan is an example of the conversion of electrical energy to  (a) chemical  (b) heat  (c) light  (d) mechanical
  2. Which of the following quantities has the same unit with that of energy?  (a) force  (b) work  (c)power  (d)pressure
  3. What energy is possessed by a mango fruit that falls from a height, just before it hits the ground?  (a) chemical  (b) heat  (c) kinetic  (d) potential
  4. The temperature at which a liquid substance changes to solid is called ____point  (a) boiling  (b) cooling  (c) freezing  (d) melting
  5. Which of the following is NOT  a form of energy  (a) coal  (b) electricity  (c) heat                   (d) sound
  6. The batteries in your torch possesses _______energy (a) heat  (b) chemical  (c) mechanical  (d) electrical
  7. If a force of 8 ON  is used to move an object through 20m within 5 seconds calculate the power of the object.  (a) 320W  (b) 230W  (c) 330W  (d) 20W
  8. All of these factors that affect evaporation except one  (a) pressure  (b) the temperature of the liquid  (c) the nature of the liquid  (d) the size of the liquid
  9. What is the S  unit for work?  (a) joules  (b) watts  (c) kgls2  (d) Newton
  10. 52,000 Joules is equivalent to  (a) 5,200KJ  (b) 5.2KJ  (c) 52KG  (d) 520KJ
  11. The following are components involved in communication except  (a) simple language             (b) active listening skills
  12. Which of the following conditions is work done?  (a) Bag of rice  standing on a platform  (b) girl holding a pot of water  (c) man climbing staircase  (d) man pushing against a stationary kerosene tanker.
  13. The process by which solid changes directly to gas is ______(a) condensation                            (b) evaporation  (c) freezing  (d) sublimation
  14. The type of energy present in the food we eat is ___(a) potential energy  (b) solar energy  (c) chemical energy  (d) heat energy
  15. Sun is regarded as the primary source of energy because  (a) all other sources of energy are derived from it  (b) it is the only source of energy  (c) it is the major source of heat and light energy  (d) it supplies energy for cooking at home


  1. The form of energy that is stored is referred to as _______________________
  2. In electric motor, electric energy is converted into __________energy
  3. The energy change in involved when a torch battery is connected to a bulb is ___________________
  4. The constant temperature at which a liquid changes into vapour is called _______________
  5. Saying “NO” to sexual requests without feeling guilty means you are being __________


Answer four (4) questions from this section

1.         Explain 2 ways people communication

b.         Mention 2 importance of communication

c.         What is assertiveness?

d.         Explain life span continuum

e.         State 3 factors that influence individual sense of self worth.

2a.       Describe the energy changes that occur when an electric pressing iron is used to press clothes

b.         An orange fruit of mass 10kg is dropped from the top of a building 40m tall.  What is its potential energy? (g = 10mls2)

c.         State the energy possessed by the following objects

i.          A mango fruit that falls from a height, just before it hits the ground

ii.         The petrol in a car

iii.        A car parked in a garage

d.         Mention 3 forms of energy

3.         Differentiate between boiling and evaporation

b.         State 3 factors that affect evaporation

c.         Calculate the kinetic theory of an arrow of mass 0.5kg moving with a velocity of 20mls

d.         If a boy of mass 30,000g lift a load through a distance of 20m. calculate the work done.

4a.       Define the following (i) work  (ii) power  (iii) energy 

b.         How much power does a boy of 45kg mass who climbed a stair with 10 steps and 1 step is 5cm high in 20 seconds (g = 10mls2)

c.         Calculate the kinetic energy of an arrow of mass 0.9kg moving with a velocity of 15mls.

5a.       Explain the kinetic theory of matter with reference to the molecular structure of solids, liquid and gas.

b.         A man of mass of 90kg is moving at a constant velocity.  He has kinetic energy of 2205J.  calculate his velocity.





SUBJECT:    BASIC SCIENCE                                                     CLASS:  J.S.S 3


  1. Which of these is an electric conductor?  (a) cloth  (b) copper  (c) glass  (d) plastic
  • The correct balanced equation for decomposition of potassium trioxocholorate (v) is            
  •   (a)          2kclO3 heat                 kcl(s) + 02 (g)

(b)        2kclO3 heat                 2kcs + 3O2 (g)

(c)        2kclO3 heat                       2kcl(s) + 4O2 (g)

(d)       2kclO3  heat                3kcl3(s) + 3O2(g)

  • The simplest unit of substance that can exist separately is (a) atom  (b) molecule        (c) element  (d) ion
  • Which of the following is the longest bone in the body?  (a) femur  (b) humerus  (c) tibia  (d) fibula
  •  In man, nervous system consists of the following EXCEPT (a) brain  (b) heart                  (c) peripheral nerve  (d) sense organs
  • Which of these is a good conductor of heats  (a) aluminium  (b) chlorine  (c) hydrogen             (d) oxygen
  • The formula for hydrochloric acid is  (a) H2Cl    (b) HCI  (c) HCl2  (d) HClO3
  • Which of these is not an element?  (a) ammonia  (b) boron  (c) fluorise  (d) potassium
  • The balanced equation for the reaction between sodium and water is                                      (a) Na2 H2O       NaOH+H2  (b) 2Na + H2O         NaOH + H2   (c) Na + 2H2O    NaOH + H(d) 2Na + 2H2O         2NaOH + H2
  • The chemical symbol for lead is  (a) Av  (b) P  (c) li  (d) Pb
  • Which of the following pairs of PH values represents the most basic solution  (a) 10 and 14  (b) 2 and 3  (c) 6 and 4  (d) 9 and 7
  • Sound travels through the following EXCEPT  (a) air  (b) vacuum  (c) water  (d) glass
  • The reaction between a base and acid is  (a) combination  (b) hydrolysis  (c) precipitation (d)neutralization
  • A straight rod placed in a basin of water appears bent, this is due to what property of light?  (a) dispersion  (b) refraction  (c) reflection  (d) interference
  • One end of a metal rod is placed on a Bunsen burner, the other end becomes hot after sometime.  This method of heat transfer is called  (a) conduction  (b) radiation                          (c) sublimation  (d) convection


  1. The  instruments used in measuring current and potential difference are __________ and ________________
  2. The IUPAC name for H2 SO4 is _______________________________
  3. ______________is the valency of sulphur 
  4. The number of protons in the nucleus of an atom is called its ___________________
  5. The IUPAC name for methane is ____________________________

SECTION C: Fill in the Gap

1a.       What is PH of a substance?  (1mk)


Solutions iiiiiiivv
PH values 235710

i.          Which above values is most basic? (1mk)

ii.         Which solution is most acidic?  (1mk)

iii.        Which one is likely to be water?  (1mk)

iv.        Which of the solutions will be slippery to touch? (1mk)

c.         Give one example each of the usefulness of (i) acids  (ii) bases  (iii) salts  (3mks)

d.         Define atomic number and mass number (2mks)

2a.       Draw and explain an atomic model (4mks)

b.         State the mode of transfer of heat in the following substances (i) water (ii) iron metal                (iii) sun (3mks)

c.         In the chemical formulae (BH4)2 SO4, the total number of atoms is what? ((1mk)

d.         Write the chemical formulae of the following compounds (i) calcium chloride (ii) sodium trioxocarbonate (N) (2mks)

3.         Mention the natural acid that can be gotten from these (2mks)

i.          Orange  (ii) sour milk  (iii) meat

b.         Calculate the amount of money that will be paid to P.H.C.N, if the current unit used is 7340KNHs and the previous value of the current unit is 6200kwtts.  Given that monthly metre charges = N30,000 and one unit kwtt is N4.00 (3mks)

c.         Explain the following (i) series circuit  (ii) parallel circuit (4mks)

4a.       Explain electroplating and give 3 3xamples of metals used in electroplating. (5mks)

b.         What are the 3 stages of extracting tin from its ore? (3mks)

c.         Differentiate between metal and non-metal (2mks)

5a.       Mention 3 importance of skill acquisition (3mks)

b.         Define the following terms (i) opaque  (b) transparent (iii) reflection (3mks)

c.         What is an echo? (2mks)

d.         Explain refraction of light (2mks)


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