Best brain science mock examination questions and answers
Best brain science mock examination Objectives. Answer all questions. Most of the questions In the various mocks will appear in your bece and wassce. Take them seriously! If you have any question ask at the comment section and you will be duly answered. I wish you success in your upcoming extermination.
1. An example of a third class lever is.
A. Wheelbarrow
B. Sugar tong.
C. Pair of scissors
D. Crowbar.
2. The release of egg into the fallopian tube is called
A. Copulation
B. Ovulation
C. Ejaculation
D. Menstruation
3. The blood vessel that carries oxygenated blood from the lungs to the heart is
A. Pulmonary vein.
B. Aorta
C. Pulmonary artery
D. Vena cava
4. An example of a parasitic plant is
A. Capsid
B. Mite.
C. Mistletoe
D. French beans
5. Which of the following is a major plant nutrient?
A. Molybdenum
B. Phosphorus
C. Zinc.
D. Copper
6. The colour of the neutral wire is.
A. Blue.
B. Yellow
C. Brown.
D. Green
7. Which of the parts of a flower develops into fruits?
A. Ovule.
B. Style
C. Ovary.
D. Stamen.
8. In a pin-hole camera, the image formed is always
A. Erect and bright
B. Erect and blurred
C. Inverted and real.
D. Inverted and virtual
9. The number of elementsu in the compound CA(OH)2 is
A. 2
B. 3
C. 4
D. 5
10. Alum is added to water during water purification to.
A. Kill germs.
B. Give taste to water.
C. Make water colourless.
D. To make suspended particles to settle
Best brain science mock examination questions and answers
11. Which of the following parasites can be controlled by hand picking?
A. Liver fluke.
B. Tick.
C. Tape worm
D. Round worm
I2. A stick immersed in water appears bent because of
A. Diffusion
B. Reflection
C. Refraction
D. Diffusion
13. One feature of metals is that they
A. Have low melting point
B. Are not malleable
C. Have luster
D. Have low density
14. Growing different crops in a difinite order is called
A. Land rotation
B. Crop rotation
C. Mixed cropping
D. Farming
15. Iodine dificiency could results in
A. Scurvy
B. Goiter
C. Diabetes
D. Kwashiorkor
16. A substance is termed combustible if it
A. Easily catches fire
B. Dissolves common salt
C. Sublime at room temperature
D. Boils at 100°C
17. Micro organisms that cause diseases are collectively called
A. Bacteria
B. Pathogens
C. Infections
D. Viruses
18. Which of the following energy is lost when sweat evaporates from the skin?
A. Sound energy
B. Chemical energy
C. Mechanical energy
D. Heat energy
19. Which of the following gases is involved in rusting?
A. Hydrogen
B. Oxygen
C. Nitrogen
D. Carbon dioxide
20. Feeling Soil between your fingers can best describe soil
A. Texture
B. Structure
C. Drainage
D. Capillarity
Best brain science mock examination questions and answers
21. Amount of oxygen in the atmosphere is
A. 20% .
B. 21%
C. 22%
D. 23%
22. The two main enzymes in the stomach are pepsin and.
A. Amylase
B. Ptyline
C. Rennin
D. Peptidase
23. The finger-like projections where food absorption occurs is called
A. Stomach
B. Aveoli.
C. Avilli.
D. Pancreas
24. Benzene is the Best solvent for
A. Chlorophyll
B. Grease
C. Latex.
D. Vegetables stains
25. Sodium hydroxide is a base because
A. It has a pH of 7
B. It has sour taste
C. It has a pH of less than 7
D. It turns red litmus paper to blue
26. Which of the following plant has its leaves modified to store food?
A. Tomato.
B. Ginger
C. Onion
D. Pineapple
27. Gases enter the leaf through the
A. Mesophyll cells
B. Stomata
C. Pith.
D. Palisade cells
28. Which of the following vegetables is cultivated for it’s leaves?
A. Carrot
B. Lettuce
C. Okra
D. Pepper
29. Which of the following body doesn’t produce its own light?
A. Moon.
B. Sun.
C. Fire-fly.
D. Star.
30. Why do we see lightening before sounds of thunder?
A. Sound moves easily
B. Light and sound travels at the same speed
C. Light travels faster than sound
D. Sound travels faster than light
Best brain science mock examination questions and answers
31. Sugar solution can be separated by
A. Decantation
B. Evaporation
C. Filtration
D. Sublimation
32. Cellulose is found in
A. Chloroplast
B. Mitochondrion
C. Cell membrane
D. Cell wall
33. The function of the hair in the nose is to
A. Make breathing easy
B. Keep nose moist.
C. Filter dust from the air.
D. Keep the nose warmth
34. A metal that is used as a thermometric liquid is
A. Aluminum
B. Copper
C. Mercury
D. Silver
35. The joule is the S.I. unit of
A. Energy
B. Force
C. Power
D. Pressure
36. Which of the following gases support combustion?
A. Hydrogen
B. Oxygen
C. Carbon dioxide
D. Carbon monoxide
37. Which of the following substances does not produce energy?
A. Sand.
B. Water
C. Coal.
D. Wind
38. Energy possessed by a body due to its position is called
A. Kinetic energy
B. Potential energy
C. Sound energy
D. Solar energy
39. The reaction between fatty acids and alkaline to produce soap is called
A. Esterification
B. Saponification
C. Neutralization
D. Crystallization
40. Which blood cells transport oxygen to all parts of the body?
A. Platelets
B. White blood cells
C. Red blood cells
D. Fibrinogen
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Practicals. Best brain science mock examination questions and answers
1. study the structure below and answer the questions that follow 
I. Identify the structure
II. Identify the parts labeled I, II, III, IV, V, VI, VII and VIII.
III. Give one function of the parts I, II, III and IV
IV. State two practices that will pose danger to the structure.
Solution to question 1a
I. Canine
II.) I- enamel
II- dentine
III- pulp cavity
IV. -Gum.
V -Jaw bone
VI.- cement
VII- vessels
VIII- nerves
III) I- protects the dentine
II. – protects the pulp cavity
III.-contains blood vessels that supply oxygen and food to the tooth
IV. Periodontal diseases
V.- not cleaning the teeth regularly
– not visiting the dentist occasionally
– using teeth to crack hard objects.
-regular intake of surgery foods.
– regular intake of hot foods
b. carefully study the electronic diagram and answer the questions that follow
I. Identify the parts labeled A and B.
II. Name the parts labeled Y, X and M.
III. State two uses of the electronic diagram
Best brain science mock examination questions and answers
solution to question 1b
I. Diagram A – NPN transistor
Diagram B – PNP transistor.
II. Parts labeled Y… Emitter
X… collector
M… Emitter
III. – they are used as amplifiers.
– They are used as switched
c. study the property of light shown below carefully and answer the questions that follow
I. Suggest an aim for the experiment
II. What will the observer see from position shown?
III. What happens if cardboard B is shifted?
IV. Explain the observation made in III above
V. What does the setup demonstrates?
VI. Mention two that work based on the phenomenon
VII. Mention two natural occurrences that depends on this property.
solution to question 1 c. Best brain science mock
I. Rectilinear propagation of light
II. The observer will see light rays
III. Light rays can not be seen through the holes again
IV. Light travels in a straight line and since cardboard B is shifted, it will block the light rays hence the observer can not see the light rays again
V. It shows that light travels in a straight line
VI. – periscope
-torch light
-pinhole camera
VIII. – shadow formation
– eclipses
– rainbow formation
d. Setup A contains fresh soil while setup B contains heated soil. Study the experimental setup below and carefully answer the questions that follow.
I. What is the aim of the experiment?
II. Name the parts of the set-up labeled I and II.
III. What observation could be made about the lime water in setup A after six hours?
IV. Explain the observation made in (III)
V. What would be the observation in B after six hours?
solution to question 1 d
I. Experiment to show that living organisms are present in the soil
II. I- string/thread.
II- conical flask
III. Observation in A: The lime water will turn milky after six hours
IV. The fresh soil contains living organisms, so as they go through respiration, carbon dioxide is released which mixes with the lime water making it milky.
V. Observation in B: lime water does not change in colour. This is because the living organisms were killed after heating the soil.
2.a. State the change that happens to the diaphragm during:
I. inhalation
Ii. Exhalation
b. State two functions of the nose.
c. I. State four tools used in vegetable production
Ii. State four ways of maintening farming tools.
d. I. List three diseases of the respiratory system.
II. State two ways of keeping the lungs a healthy.
Solution to question number two
a. I. During inhalation, the diaphragm contracts and flattens.
II. During exhalation, the diaphragm relaxes to achieve it’s dome shaped
b. – the nose is use for breathing
– it is used to detect scent or for smelling
ci. – hoe.
– cutlass
– rake.
– trowel
-hand fork.
Ii. Ways of maintening farming tools
– oiling metal parts
_ repairing broken areas
_ use them for their intended purposes
-shappen tools before usage
– keep them clean
d. I. _ asthma
_tuberculosis
_pneumonia
_lung cancer.
– common cold.
-influenzer.
II. Keeping the lungs healthy
– avoid smoking
– regular exercise
_keeping proper ventilation
3.a. I. What is ecosystem?
Ii. State the reason why producers are important in an ecosystem
b. State three effects of hazards on the victim
c. List four human activities that can cause air pollution
d. State two difference between crop rotation and land rotation
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solution to question number three. best brain science mock
a. I a ecosystem is made up of living and non-living things in their natural habitats and the relationship that exist between them.
Ii. Why producers are important
– they begin the food chain
– they produce oxygen to support animals life.
– they provide organisms with energy
b. Effects of hazards
_damage to properties
– can cause death
– can cause permanent disability
_ Reduction in efficiency in victim
c. Causes of air pollution.
– burning of fuel.
-burning of woods
– bush burning
_use of old vehicles
d. – in crop rotation, the farmer maintains one piece of land but in land rotation, the farmer works on different pieces of land.
– in crop rotation, different crops are planted in a definite order but in land rotation, crops are not planted in a definite order.
Best brain science mock examination questions and answers
4. a explain how rainbow is formed
b. Why is it difficult to crack an egg at the pointed edges as compared to the flatter edges.
c. Give three principles of crop rotation
d. Name the types of soil erosion and explain them.
Best brain science mock examination questions and answers.
solution to question number four.
a. Rainbow is formed based on dispersion of light. When white light passes through water droplets, it is scattered in to seven components colours called rainbow colours.
b. It is difficult to crack an egg at the pointed edges as compared to the flatter edges because, the total surface area of the pointed area is smaller than that of the the flatter edges hence pressure at the pointed edges is larger than the flatter edges. This demands greater Force to break through the pressure at the pointed edges. This is so because pressure is directly proportional to force and invernsely proportional to area.
c. Principles of soil erosion
_ leguminous crop should be included in the program
– deep rooted crop should be followed by shallow rooted crop
-Crops that are likely to be affected by the same diseases should not follow each other.
– fallow period should be allowed
d. Types soil erosion
I. Sheet erosion- it is the gradual wearing away of the top soil by rain water or wind .
Ii. Splashed erosion- it is the scattering of soil particles by rain drops
III. Rill erosion- is the type of soil erosion that involves the creation of narrow channels
IV. Gulley erosion_ it is the creation of deep channels or gutters..Rill erosion leads to gulley erosion.
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