Here are the WASSCE 2025 Integrated Science past questions and answers. Use the WASSCE 2025 Integrated Science past questions and answers for revision as you prepare for your upcoming exams.
OBJECTIVE TEST
1. A body has a mass of 70 kg. What is the force due to the earth acting on it? [g = 10 ms-2]
A. 3500 N
B. 700 N
C. 70 N
D. 7000 N
2. The main practice which is carried out in the nursery just before seedlings are transplanted is
A. shading
B. pricking-out
C. hardening-off
D. thinning
3. The diagram below is an electrical circuit showing two resistors connected in parallel. Determine the effective resistance of the combination.
A. 1.20 Ω
B. 0.83 Ω
C. 5.00 Ω
D. 6.00 Ω
4. The following statements are examples of application of biotechnology in agriculture except
A. improving upon colour and size of a flower
B. development of pest-resistant crops
C. crossing animals with desired characteristics
D. introduction of foreign genes into livestock
5. The movement of water into root hairs is by
A. osmosis
B. diffusion
C. capillarity
D. transpiration
6. An example of soil micronutrient is
A. nitrogen
B. iron
C. iron
D.sulphur
7. Which of the following systems in the human body is directly affected when carbon monoxide is inhaled?
A. Respiratory
B. Excretory
C. Circulatory
D. Circulatory
8. The part of the human brain that controls body temperature is
A. medulla oblongata
B. hypothalamus
C. cortex
D. cerebellum
9. How many moles of HCl is contained in 14.6 g of HCl? [H = 1, Cl = 35.5]
A. 0.4 mol
B. 0.04 mol
C. 0.004 mol
D. 4.0 mol
10. In which of the following blood vessels is the pressure highest?
A. Dorsal aorta
B. Renal artery
C. Hepatic artery
D. Vena cava
11. The functional group for alkanol is
A. -C=C-
B. C=C
C. -C-C-
D. -OH
12. Which of the following statements about magnetic fields are correct? A magnetic field
I. has magnetic lines of force.
II. is a force field.
III. has direction.
A. II and III only
B. I and III only
C. I and II only
D. I, II and III
13. Substances excreted by the skin of humans include
A. salts and water only
B. urea and salts only
C. water and urea only
D. salts, urea and water only
14. The type of livestock raised in any area depends mainly on the
A. inputs available
B. availability of land
C. type of climate
D. availability of labour
15. The IUPAC name for Na₂SO₄ is
A. sodium tetraoxosulphate (IV)
B. disodium sulphate
C. sodium (II) sulphate
D. sodium tetraoxosulphate (VI)
16. Which of the following vegetables provide the largest amount of roughage in the diet of humans?
A. Carrot
B. Cabbage
C. Beans
D. Pepper
17. The immunization of children is important because it
A. increases the production of white blood cells
B. stimulates the production of antibodies
C. destroys pathogens in the body
D. stimulates the production of antigens
18. What is the kinetic energy of a body of mass 20 kg moving with a velocity of 4 m s-1?
A. 80 J
B. 160 J
C. 320 J
D.5 J
19. The gas produced when a dilute hydrochloric acid reacts with calcium carbonate is
A. chlorine
B. carbon dioxide
C. carbon monoxide
D. hydrogen
20. Which of the following statements about the image formed in a pinhole camera are correct? The image is
I. inverted.
II. upright.
III. real.
A. II and III only
B. I and III only
C. I and II only
D. I and II only
21. Which of the following traits in humans is an example of continuous variation?
A. Body mass
B. Colour blindness
C. Gender
D. Blood group
22. Which of the following chemical equations is balanced?
A. Na + Cl₂ → NaCl
B. Mg + O₂ → MgO
C. K + O₂ → K₂O
D. 2Na + Cl₂ → 2NaCl
23. The instruments used to measure the mass of a body include
I. top pan balance.
II. spring balance.
III. electronic balance.
A. II and III only
B. I and III only
C. I and III only
D. I and II only
24. Which of the following animals is a non-ruminant herbivore?
A. Poultry
B. Pig
C. Cattle
D. Rabbit
25. The energy needed for natural cycles to operate is obtained from
A. fossils
B. the sun
C. the air
D. decomposers
26. Ectoparasites of farm animals are effectively controlled by
A. handpicking
B. drenching
C. dipping
D. quarantine
27. A device which converts chemical energy to electrical energy is
A. resistor
B. cell
C. bulb
D. voltmeter
28. A flowering plant with poorly developed roots, yellow buds and yellowing new leaves is likely to be deficient in
A. manganese
B. copper
C. boron
D. sulphur
29. Water is not suitable as a thermometric liquid because it
I. is opaque.
II. wets glass.
III. expands abnormally.
A. II and III only
B. I and III only
C. I and II only
D. I, II and III
30. Conversion of nitrites to nitrates in the nitrogen cycle is caused by
A. Azotobacter
B. Nitrobacter
C. Nitrosomonas
D. Rhizobium
31. In the control of malaria, the main aim of spraying stagnant water bodies is to
A. ensure that the adult mosquitoes have no hiding place
B. prevent the larvae from breathing in air
C. make the water unsuitable for egg development
D. prevent the laying of eggs by the mosquitoes
32. Aluminium does not corrode easily because it
A. forms aluminium oxide on its surface
B. is a strong metal
C. is hard
D. forms aluminium hydroxide on its surface
33. Which part of the leaf is the amount of glucose produced during photosynthesis the least?
A. Guard cell
B. Palisade mesophyll
C. Spongy mesophyll
D. Upper epidermis
34. Which of the following physical properties of water are correct?
I. It is tasteless.
II. It has a pH of 7.
III. It is colourless.
A. II and III only
B. I and III only
C. I and II only
D. I, II and III
35. During rusting, iron reacts with oxygen to form
A. iron (III) oxide
B. iron (IV) oxide
C. iron (II) oxide
D. iron (V) oxide
36. Members of the same species living at the same place at the same time make a/an
A. population
B. ecosystem
C. community
D. trophic level
37. The westerlies are winds that blow
A. from the poles
B. towards the poles
C. towards the equator
D. from the equator
38. The P-N junction diode has
A. equal number of holes and electrons
B. no holes
C. no electrons
D. more electrons than holes
39. The correct sequence of the arrangement of vertebrae in a mammal is
A. thoracic, caudal, lumbar, cervical
B. cervical, lumbar, thoracic, caudal
C. thoracic, cervical, lumbar, caudal
D. cervical, thoracic, lumbar, caudal
40. Which of the following structures is present in animal cells only?
A. Mitochondrion
B. Lysosomes
C. Golgi body
D. Ribosome
41. Loss of appetite and poor growth in humans are due to the deficiency of
A. copper
B. zinc
C. iron
D. iodine
42. Nucleons refer to the sum of
A. electrons and neutrons in an atom
B. protons and neutrons in an atom
C. protons and electrons in an atom
D. electrons and molecules in an atom
43. Which of the following statements are correct?
I. Greenhouse effect can be reduced by afforestation.
II. One effect of ozone layer depletion is global warming.
III. Greenhouse effect is reduced by bush burning.
A. II and III only
B. I and III only
C. I and II only
D. I, II and III
44. The nuclide ²³⁰Th undergoes alpha decay. The mass number and atomic number of the daughter nuclide are respectively
A. 230, 90
B. 226, 88
C. 226, 89
D. 222, 86
45. Ash from cocoa pod tastes bitter because it contains
A. alcohol
B. alkali
C. acid
D. soap
46. A musical note is sound with a definite
A. intensity
B. frequency
C. amplitude
D. velocity
47. Hydrological cycle is the system by which water continuously circulates through the
A. troposphere
B. biosphere
C. atmosphere
D. mesosphere
48. The structure associated with the absorption of fatty acids and glycerol in the small intestines is the
A. lacteals of the villi
B. lymphatic system
C. blood capillaries
D. hepatic portal veins
49. It is most difficult to detect carbon (II) oxide gas than most poisonous gases because it
A. does not support combustion
B. is insoluble in water
C. is heavier than air
D. has no smell and colour
50. Metamorphic rocks are formed through
A. chemical change caused by heat and pressure
B. biological change of original rocks
C. physical disintegration of igneous rocks
D. combination of igneous and sedimentary rocks
THEORY QUESTIONS
1.(a) What are exotic breeds?
[2 marks]
(ii) State three advantages of exotic breeds of poultry.
[2 marks]
(b) Define relative atomic mass.
[3 marks]
(ii) Calculate the molar mass of each of the following compounds:
(α) Na₂CO₃
(β) CH₃COOH
[Na = 23, O = 16, C = 12, H = 1]
[2 marks]
(c) Name two organisms commonly used in biotechnology.
[2 marks]
(ii) Give one example of an industry which uses each of the organisms named in (i).
[2 marks]
(d)(i) List three other sources of electric power generation apart from hydro and thermal sources.
[2 marks]
(ii) State the energy transformation that takes place in any two of the listed sources.
[2 marks]
2.
(a) The nuclides of sodium and fluorine are represented as 2311Na and 199F respectively. State the number of:
(α) protons in each atom;
(β) neutrons in each atom.
[2 marks]
(ii) Draw a diagram to show the electron configuration of:
(α) sodium ion;
(β) fluorine ion.
[4 marks]
(b) State two reasons why salt is important in the diet of humans.
[2 marks]
(ii) Give two examples of an abiotic factor which is non-climatic in terrestrial ecosystem.
[2 marks]
(c)(i)What is an electrical conductor?
[2 marks]
(ii) Two lamps of resistances 3Ω and 5Ω are connected in parallel to a 6V source. Calculate the value of the current supplied by the source.
[3 marks]
(d) Distinguish between ear-notching and ear-tagging in farm animals.
[2 marks]
(ii) List three ecto-parasites that infest goats in West Africa.
[3 marks]
3. (a)(i) State three functions of the respiratory system of humans.
[3 marks]
(ii) Name one reagent used to test for each of the following food substances in the school laboratory:
(α) proteins;
(β) lipids;
(γ) reducing sugars.
[3 marks]
(b) What is a longitudinal wave?
[2 marks]
(ii) State two differences between music and noise.
[2 marks]
(c) Explain the term ruminants as used in animal production.
[2 marks]
(ii) State three advantages of rearing rabbits.
[3 marks]
(d)(i) What is a standard solution?
[2 marks]
(ii) A standard hydrochloric acid solution is to be prepared from a stock solution of HCl of concentration 10 mol dm⁻³.
(α) What volume of the stock solution is needed to prepare 0.50 dm³ of 2.0 M HCl?
(β) Calculate the volume of water required.
[3 marks]
4.(a)(i) State three advantages that parallel electrical wiring has over series electrical wiring in a household.
[3 marks]
(ii) An immersion heater is rated 220 V, 850 W. Determine the current flowing through the heater.
[2 marks]
(b)(i) Explain the term soil conservation.
[2 marks]
(ii) State two ways by which each of the following activities help in conserving the soil:
(α) addition of organic matter;
(β) crop rotation.
[4 marks]
(c) What are petrochemicals?
[2 marks]
Name two uses of petrochemicals in Agriculture.
[2 marks]
(d) With the aid of a genetic diagram, explain briefly how a couple of normal skin colors produces an albino.
[5 marks]
5.(a)(i) Describe briefly each of the following post-harvest practices:
(i) Winnowing;
(ii) Dehusking;
(iii) Shelling.
[6 marks]
(b)(i) Name the type of movable joint found at each of the following locations in the human body:
(α) fingers;
(β) where the neck joins the head.
[2 marks]
- State one characteristic feature each of the joints named in (i).
[2 marks]
(c)(i) What is a magnetic field?
[2 marks]
- Draw a bar magnet and show the magnetic field around it.
[3 marks]
(d)(i) Complete the following chemical equations:
(α) H₂SO₄ + NaOH → ______ + ______
(β) CH₃COOH + CH₃OH → ______ + ______
[3 marks]
(ii) Name each of the reactions in (i) (a) and (b).
[2 marks]
6.(a) State one significance each of the following stages of treatment of water for public consumption:
(i) Aeration;
(ii) Sedimentation;
(iii) Filtration;
(iv) Chlorination;
(v) Coagulation.
[5 marks]
(b)(i) What is weight of a body?
[2 marks]
(ii) The mass of a body is 70 kg. Determine the weight of the body.
[g = 10 m s⁻²]
[3 marks]
© State five challenges associated with pig production in Ghana.
[5 marks]
(d)(i) State three effects of Sexually Transmitted Infections (STIs) on the male reproductive system of humans.
[3 marks]
(ii) Name two glands of the human reproductive system that produce hormones.
[2 marks]
WASSCE 2025 Integrated Science Answers
1. B. 700 N
2. C. Hardening-off
3. B. 0.83 Ω
4. C. Crossing animals with desired characteristics
5. A. Osmosis
6. B. Iron
7. C. Circulatory system
8. B. Hypothalamus
9. A. 0.4 mol
10. A. Dorsal aorta
11. D. –OH
12. D. I, II and III
13. D. Salts, urea and water only
14. C. Type of climate
15. D. Sodium tetraoxosulphate (VI)
16. C. Beans
17. B. Stimulates the production of antibodies
18. B. 160 J
19. B. Carbon dioxide
20. B. I and III only
21. A. Body mass
22. D. 2Na + Cl₂ → 2NaCl
23. B. I and III only (Top-pan and electronic balances.)
24. D. Rabbit
25. B. The sun
26. C. Dipping
27. B. Cell
28. C. Boron
29. A. II and III only
30. B. Nitrobacter
31. B. Prevent the larvae from breathing in air
32. A. Forms aluminium oxide on its surface
33. D. Upper epidermis
34. D. I, II and III
35. A. Iron (III) oxide
36. A. Population
37. No correct option as written. Westerlies blow from west to east.
38. D. More electrons than holes (This describes the N-type semiconductor region, not the entire P–N junction.)
39. D. Cervical, thoracic, lumbar, caudal (The sacral region is omitted.)
40. B. Lysosomes
41. B. Zinc
42. B. Protons and neutrons in an atom
43. C. I and II only (Likely intended answer; statement II is scientifically imprecise.)
44. B. 226, 88
45. B. Alkali
46. B. Frequency
47. B. Biosphere
48. A. Lacteals of the villi
49. D. Has no smell and colour
50. A. Chemical change caused by heat and pressure
