KUULCHAT
SCIENCE MOCK
OBJECTIVE TEST
1.
The process by which a naphthalene ball (camphor) placed in a box gets smaller in size is termed
A.
Melting
B.
Diffusion
C.
Evaporation
D.
Sublimation
E.
Condensation
Answer: D
Sublimation is the conversion of a substance from the solid to the gaseous state without its becoming liquid.
2.
The S.I unit of temperature is
A.
Candela
B.
Degree Celsius
C.
Joule
D.
Kelvin
Answer: D
3.
The form of energy produced from the nucleus of an atom is termed
A.
chemical energy
B.
mechanical energy
C.
nuclear energy
D.
thermal energy
Answer: C
4.
The practice of reducing the number of seedlings per stand for better growth is known as
A.
earthing up.
B.
filling in.
C.
pricking out.
D.
thinning out.
Answer: D
Thinning out: This is the removal of some plants from the area grown with seeds. This is done mainly to make room for the seeds to grow well.
Earthing up: is a farming technique that involves mounding soil around the base of a plant, usually a crop. This technique has been used for centuries in agriculture and has a variety of benefits for crops. One of the main reasons for earthing up is to protect the plant from extreme weather conditions.
5.
The work done when a force moves a body through a distance of 12 m is 720 J. The force applied is
A.
8640 N.
B.
732 N.
C.
708 N.
D.
60 N.
Answer: D
6.
Which of the following processes could be used to obtain water from a salt solution?
A.
Filtration
B.
Decantation
C.
Evaporation
D.
Distillation
E.
Sedimentation
Answer: D
7.
Which of the following mixtures can be separated by filtration?
A.
Salt in water
B.
Sugar in water
C.
Sand in water
D.
Oil in water
E.
Omo in water
Answer: C
8.
Dehusking and shelling are both activities carried out in the processing of
A.
cowpea.
B.
groundnut.
C.
maize.
D.
sorghum.
Answer: C
9.
All of the following are herbivores except
A.
sheep
B.
dog
C.
goat
D.
grasscutter
E.
rabbit
Answer: B
An herbivore is an organism that feeds mostly on plants.
10.
Which of the following features is shown by plants only?
A.
Feeding
B.
Growth
C.
Transpiration
D.
Reproduction
E.
Respiration
Answer: C
11.
A balanced diet is one which is made up of
A.
right proportions of protein, carbohydrates and oil.
B.
equal amounts of protein, carbohydrates and oil.
C.
enough water and iodated salt.
D.
vegetables, fruits and water.
Answer: A
12.
The central nervous system is made up of the
A.
brain and nerves.
B.
brain and spinal cord.
C.
veins and nerves.
D.
skull and spine.
Answer: B
13.
Which of the following food items contains the highest amount of dietary fiber?
A.
Beans
B.
Bread
C.
Cabbage
D.
Egg
Answer: C
14.
A structure in the human reproductive system which stores sperms temporarily is the
A.
epididymis.
B.
penis.
C.
scrotum.
D.
vulva.
Answer: A
15.
The cultivation of different crops on different plots of a farmland in a definite cycle is called
A.
land rotation.
B.
shifting cultivation.
C.
crop rotation.
D.
mixed cropping.
Answer: C
16.
A stone released from a catapult was able to kill a bird because
A.
the stone had a lot of energy
B.
the stone was sharp
C.
there was tension in the stone
D.
the rubber of the catapult was strong
E.
the stone was big
Answer: A
17.
Which of the following plants reproduce(s) vegetatively?
I. Banana
II. Mango
III. Ginger
A.
II only
B.
I and II only
C.
I and III only
D.
III only
Answer: C
Vegetative reproduction, any form of asexual reproduction occurring in plants in which a new plant grows from a fragment of the parent plant or grows from a specialized reproductive structure (such as a stolon, rhizome, tuber, corm, or bulb).
18.
An example of a legume is
A.
groundnut.
B.
millet
C.
sorghum
D.
sweet potato
Answer: A
A legume is a plant in the family Fabaceae.Legumes produce a botanically unique type of fruit – a simple dry fruit that develops from a simple carpel and usually dehisces (opens along a seam) on two sides.They are characterized by having a legume-type of fruit (or pod) and compound, stipulate leaves. Examples are groundnut, Beans,Peanuts Peas, Soybeans, Alfalfa, Clover, Carob,Chickpeas, Lentils, Lupins Mesquite, Tamarind, Mimosa.
19.
The function of the platelets in the circulatory system of humans is to
A.
Transport oxygen
B.
Transport carbon dioxide
C.
Clot of blood
D.
Defend the blood
Answer: C
20.
The solid component found on the filter paper and the liquid component that flows into a container during filtration are respectively called
A.
filtrate and residue.
B.
condensate and residue.
C.
residue and filtrate.
D.
residue and condensate
Answer: C
The solid that remains on the filter paper is called the residue, and the liquid that passes through the filter paper is called the filtrate
21.
A substance which is made up of the same kind of atoms is called
A.
a compound
B.
an element
C.
a mixture
D.
an ion
Answer: B
Compound
A compound is a substance which contains two or more elements chemically combined.
Element
An element is a pure substance made up of atoms of the same kind
Mixture
A mixture is formed when two or more substances are combined physically.
Ion
Any atom or group of atoms that bears one or more positive or negative electrical charges.
Positively charged ions are called cations and negatively charged ions, anions.
Cation is a positively charged atom or group of atoms and formed when an atom or group of atoms lose electrons.
Anion is a negatively charged atom or group of atoms and formed when an atom or group of atoms gain electrons.
22.
The following practices are principles in crop production except
A.
land selection.
B.
pests and diseases control.
C.
seed planting.
D.
harvesting and processing.
Answer: D
23.
In an experiment to determine the various particle sizes of soil sedimentation, the particle above clay suspension are
A.
Loam
B.
Organic
C.
Gravels
D.
Silt
Answer: B
24.
The change in the volume of water when a piece of stone is dropped into it is equal to the
A.
density of the stone.
B.
mass of the stone.
C.
volume of the stone.
D.
weight of the stone.
Answer: C
25.
Water is sometimes referred to as a universal solvent because it
A.
is the purest liquid on earth.
B.
is the commonest liquid on earth.
C.
is found in all living cells.
D.
dissolves most substances.
Answer: D
26.
The structure which helps a fish to breath under water is the
A.
gill.
B.
air sac.
C.
operculum.
D.
mouth.
Answer: A
27.
An example of a derived quantity is
A.
length.
B.
mass.
C.
time.
D.
velocity.
Answer: D
28.
Which of the following is a sexually transmitted disease?
A.
Cholera
B.
Rickets
C.
Tuberculosis
D.
Syphilis
E.
Measles
Answer: D
29.
A substance that could be used in large scale treatment of domestic water is
A.
Nitrogen.
B.
Hydrogen sulphide.
C.
Carbon dioxide.
D.
Chlorine.
Answer: D
30.
Which of the following structures is not involved in blood circulation?
A.
Capillary
B.
Heart
C.
Muscle
D.
vein
Answer: C
31.
Which of the following conditions describes a first class lever?
A.
The load is between the effort and pivot
B.
The pivot is between the effort and the load
C.
The effort is between the pivot and the load
D.
The load arm is equal to the effort arm
Answer: B
First class → Pivot/Fulcrum at the middle
Second class → Load at the middle
Third class → Effort at the middle
In summary PLE which is the last three letters of PEOPLE if you may forget in an examination.
32.
Which of the following substances is used to purify water for town supply?
A.
Alcohol
B.
Carbon dioxide
C.
Chlorine
D.
Nitrogen
E.
Sulphur
Answer: C
33.
Which of the following statements about an opaque object is correct? An opaque object
A.
allows light to pass through it partially.
B.
allows light to pass through it fully.
C.
forms a shadow.
D.
does not form a shadow.
Answer: C
34.
Oxygen is made available to all cells of the human body by the
A.
plasma.
B.
platelets.
C.
white blood cells.
D.
red blood cells.
Answer: D
35.
Calcium oxide and water reacts to form calcium hydroxide. The formula for the product is
A.
Ca2OH
B.
Ca(OH)2
C.
CaH2O
D.
Ca(H2O)2
Answer: B
CaO + H2O → Ca(OH)2
36.
The form of energy which flows from one point to another due to temperature differences is known as
A.
mechanical energy.
B.
heat energy.
C.
solar energy.
D.
nuclear energy.
Answer: B
37.
A mixture of sand and water can be separated through
A.
filtration
B.
ionization
C.
condensation
D.
sedimentation
E.
evaporation
Answer: A
38.
Which of the following food substances is not involved in respiration?
A.
Amino acids
B.
Fatty acids
C.
Glucose
D.
Vitamins
Answer: D
39.
When an atom loses an electron, the ion formed is called
A.
an anion.
B.
a cation.
C.
a molecule.
D.
a compound.
Answer: B
Ion: is a charged atom or a group of atoms which possesses an electric charge.
Cation: The ion formed when an atom loses electron(s) is known as cation e.g. Na+, Mg2+
Anion: The ion formed when an atom gains electron(s) is known as anion e.g Cl-, O2-
40.
The complete development of a human foetus in the womb normally takes
A.
7 months.
B.
8 months.
C.
9 months.
D.
10 months.
Answer: C
THEORY QUESTIONS
1.
a)
i)
What is soil erosion?
ii)
Give two types of soil erosion.
b)
Write the name and chemical formula of the compounds formed when the following elements combine:
i)
zinc and oxygen
ii)
calcium and chlorine
c)
i)
Distinguish between heat and temperature.
ii)
Draw and label the mercury-in-glass thermometer.
iii)
What mode of heat transfer is involved in the use of a thermometer?
a)
i)
Soil erosion is the removal/washing away of soil particles/topsoil by running water or rain or wind.
ii)
Types of soil erosion
1. Gully
2. Rill
3. Sheet
4. Splash
b)
i)
zinc and oxygen → Zinc oxide (ZnO)
ii)
calcium and chlorine → Calcium chloride (CaCl2)
c)
i)
Differences between heat and temperature
| Heat | Temperature |
| Is the energy which causes rise in temperature of bodies | Is the degree of hotness or coldness of a body |
| Measured in joules | Measured in kelvin (K) or degree celcius (oC) |
ii)
iii)
Conduction
2.
a)
i)
What is the importance of a fuse in an electrical appliance?
ii)
State two household appliances that have fuse.
b)
i)
What is teenage pregnancy?
ii)
State two causes of teenage pregnancy.
c)
State three precautions against hazards.
d)
i)
State two practices that destroy water bodies.
ii)
Give two methods of conserving water bodies.
a)
i)
Importance of a fuse in an electrical appliance
1. To protect electrical equipment from excessive current
2. It is used as safety measures to prevent any hazards to humans
ii)
Household appliances that have fuse
1. Lamps
2. Televisions
3. Wall socket
4. Computers
5. Kettle
6. Dishwasher
7. Fridges/freezers
8. Electric fan
9. Electric iron/iron
10. Microwave
b)
i)
Teenage pregnancy is when a girl under age 20 conceives/takes seed.
OR
Teenage pregnancy is when female/girls under the age of 20 get pregnant.
OR
Teenage pregnancy is when a female/girl under the age of 20 engages in sexual activity and becomes pregnant either intentionally or unintentionall.
ii)
Causes of teenage pregnancy
1. Poverty
2. Single parenthood
3. Rape
4. Peer pressure, etc.
c)
Precautions against hazards
1. Wearing protective clothing/boots/goggles/gadget
2. Routine maintenance of equipment/apparatus
3. Developing right skills for use of equipment
3. Closing all taps before leaving the laboratory
4. Switching off all electrical points
5. Mounting hazard signs of dos and don'ts in the laboratory/working area
6. Store materials appropriately
7. Carry chemicals in approved containers
8. Always wash hands after using any unsafe material
d)
i)
Practices that destroy waterbodies
1. Deforestation/clearing vegetation along the river banks
2. Bush burning
3. Farming near water bodies
4. Galamsey/surface mining activities
5. Dumping of solid/liquid waste into water bodies
6. Use of chemicals for fishing
7. Excessive use of chemical fertilizers
8. Defecation into water bodies, etc.
ii)
Methods of conserving water bodies
1. Use of organic materials for composting
2. Use of appropriate methods of fishing
3. Education on effects of galamsey activities
4. Education on defecation into water bodies
5. Use of erosion-control methods in farming
6. Afforestation, etc.
3.
a)
Write the systematic name for each of the following compounds.
i)
H2O;
ii)
MgO;
iii)
CaO;
iv)
CaCl2.
b)
Name the instrument used in measuring the following:
i)
Length of a rope;
ii)
Mass of a stone;
iii)
Temperature of a liquid;
iv)
Volume of a liquid.
c)
List three factors that influence vegetable crop production.
d)
Name four stages in the cycle of a flowering plant.
a)
Systematic names
i)
H2O → Water/dihydrogen monoxide/hydrogen oxide
ii)
MgO → Magnesium oxide
iii)
CaCO → Calcium oxide
iv)
CaCl2 → Calcium chloride
b)
Measuring instruments
i)
Length of a rope → Metre rule/tape measure/ruler/surveyor's tape
ii)
Mass of a stone → Beam balance/chemical balance/top pan balance/electronic balance
iii)
Temperature of a liquid → Thermometer
iv)
Volume of a liquid → Volumetric flask/pipette/graduated cylinder/measuring cylinder/burette/graduated beaker
c)
Factors that influence vegetable crop production
1. Slope of land/topography
2. Water/water supply or quality
3. Crop/variety selection
4. Market development
5. Soil type/quality/fertile soil
6. Method of propagation
7. Cultural practices(or any named cultural practice)
8. Harvesting
9. Weather conditions
10. Storage
11. Disease (control)
12. Processing
d)
Stages in the cycle of a flowering plant
1. Seed/fruit formation
2. Germination
3. Reproduction
4. Pollination
5. Seed spreading/dispersal
6. Flowering
7. Fertilization
8. Maturation of fruit or Seed
9. Seedling
10. Growth/maturation/matured plant
4.
(a)
The diagrams below are illustrations of an experimental set-up.
Study the diagrams carefully and answer the questions that follow.
(i)
Identify each of the parts labelled I, II and III.
(ii)
Name the method of separation in each of the set-up:
Α
A;
Β
B.
(iii)
State the class of mixtures that the experimental set-up A could be used for.
(iv)
Give a reason for the answer stated in (iii).
(v)
Name one possible component of the mixture in set-up B.
(vi)
State the function of the part labelled IV.
(b)
The diagram below is an illustration of a part of a system in human.
Study the diagram carefully and answer the questions that follow.
(i)
Name the system illustrated
(ii)
Name each of the parts labelled, I,II,III, and IV.
(iii)
What is the role of the part labelled I.
(iv)
Name three diseases that affects the system illustrated.
(c)
The diagram below is an illustration of an experimental set-up used to measure an ecological factor.
Study the diagram carefully and answer the questions that follow.
(i)
Identify the apparatus illustrated.
(ii)
Name each of the parts labelled I,II and III.
(iii)
Give one use each of the parts labelled I and II.
(iv)
What ecological factor was measured?
(v)
State three ways in which the ecological factor measured in (iv) is important in agricultural soils.
(vi)
Name one farm tool that aids the ecological factor measured in (iv) to perform its function in agricultural soils.
(vii)
Describe how the farm soil tool named in (vi) is used to aid the factor measured in the experiment.
(d)
The diagrams below are illustrations of electrical circuits.
Study the diagram carefully and answer the questions that follow.
(i)
Identify each of the components labelled I, II and III.
(ii)
State the type of arrangement of resistors (R) in B.
(iii)
State the effect of the arrangement of resistors in each of the diagrams A and B on III.
(iv)
Give a reason for each of the answers stated in (iii).
(a)
(i)
I = beaker
II = residue/particles/cotton wool/mixture/filter paper
III = filtrate
(ii)
Methods of Separation
Α
A - filtration
Β
B - magnetization
(iii)
Class of mixtures
1. Solid - liquid mixture
2. Liquid - solid mixture
(iv)
Reason for the class of mixture
Because there is residue on the filter paper and filtrate in the beaker
(v)
possible component of the mixture in set-up B
- iron fillings/any magnetic substance
- powdered sulphur
- sand
- powdered chalk
- powdered charcoal
- any non-magenetic substance
(vi)
Function of part labelled IV (Retort/Clamp Stand)
It holds the funnel in place/holds the clamp
(b)
(i)
The system illustrated is respiratory system
(ii)
Name of the parts labelled
I = Larynx/Voice Box
II = Trachea/windpipe
III = Bronchus
IV = lung
(iii)
Role of the part labelled I (Larynx)
1. Allows air to pass through it/breathing
2. Prevent food and drink from blocking the airways
3. Produces sound/phonation
(iv)
Diseases of the respiratory system
1. Tuberculosis/T.B.
2. Bronchitis
3. Pneumonia
4. Whooping cough
5. Lung cancer
6. Influenza
7. Asthma
8. Bronchiectasis
9. Idiopathic pulmonary fibrosis/pulmonary disease
10. Common cold
11. Covid-19
(c)
(i)
Rain gauge
(ii)
Name of the parts labelled
I = funnel
II = measuring cylinder
III = rain water/water
(iii)
Use of the parts labelled I (funnel) and II (measuring cylinder)
I - directs rain water into the measuring cylinder
II - use to measure the amount/volume of rain water/collect rain water
(iv)
Ecological factor measured
Rainfall/amount of rainfall/rain
(v)
Importance of ecological factor measured
1. Protects plants roots from injury
2. Causes erosion
3. Causes leaching
4. Needed for seed germination
5. Promotes activities of soil organisms
6. Aids in easy tillage of soil
7. An agent of weathering of rocks in the soil
8. Dissolves plant nutrients for easy absorption
9. Makes soil fertile
10. Determine the type of crop to grow
11. Used for photosynthesis
(vi)
Handfork
(vii)
Use to loosen hard soil surface after heavy rainfall
(d)
(i)
Name of the components labelled
I = cell
II = switch/key
III = lamp/bulb
(ii)
Type of arrangement of resistors (R) in B is parallel
(iii)
A - makes III/bulb dim
B - makes III/bulb bright
(iv)
Reasons
A - the resistors in series have an increased resistance
B - the resistors in parallel have decreas resistance hence keep the bulb bright
5.
a)
Name the two processes that lead to the formation of seeds in a flowering plant.
b)
i)
Give five components of blood.
ii)
State three functions of blood.
c)
i)
What is an electrical insulator?
ii)
Mention three examples of insulators.
iii)
Give two characteristics of an insulator that explain its behaviour
d)
Classify the following substances under the three states of matter: petrol, palm oil, soap, carbon dioxide, corn flour, smoke
a)
The two processes that lead to the formation of seeds in a flowering plant
1. Pollination
2. Fertilization
b)
i)
Components of blood
1. Red blood cells/haemoglobin
2. White blood cells/phagocytes/lymphocytes
3. Hormones
4. Water
5. Oxygen
6. Carbon dioxide
7. Salts
8. Glucose
9. Amino acids/proteins
10. Urea
11. Vitamins
12. Plasma
ii)
Functions of blood
1. It carries hormones
2. It carries oxygen
3. It carries food to all parts of the body
4. It removes waste products of cell activities (metabolism)
5. It fights against disease causing organisms
6. It prevents entry of germs into the body through a wound
7. It forms clots which prevents excessive bleeding
8. It regulates body temperature
c)
i)
Electrical insulator is a material that does not allow electricity to flow through it easily.
ii)
Examples of insulators
1. Wood
2. Plastic materials
3. Rubber
4. Paper
5. Glass
6. Nylon
7. Mica
8. Porcelain
9. Amber
10. Wax
11. Ceramic materials
12. Air
iii)
Characteristics of an insulator
1. There are no free electrons
2. Electrons are tightly bound to the nuclei
3. It has low charge density
4. It has low electrical conductivity
d)
| Solid | Liquid | Gas |
|
Soap
|
Petrol
|
Carbon dioxide
|
6.
(a)
(i)
Name two elements which make the teeth of mammals strong.
(ii)
Name two common diseases of the human teeth.
(b)
State three reasons why sandy soil cannot support effective plant growth.
(c)
An atom has 13 protons and 14 neutrons:
(i)
draw and label the structure of the atom.
(ii)
State its valency.
(d)
(i)
State three ways in which fluid pressure is applied in everyday activities.
(ii)
State one substance that is an insulator.
(a)
(i)
Elements that make the teeth strong
1. Calcium
2. Flourine
3. Phosphorus
(ii)
Common diseases of the human teeth
1. Dental caries/cavity/tooth decay
2. Gum disease/gingivitis/periodontal disease
3. Cancer
4. Plague
(b)
Reasons why sandy soil cannot support effective plant growth
1. Cannot hold enough water/easy for water to filter out
2. Easily eroded
3. Heats up easily/ dries out easily
4. Poor in nutrient content/less fertile
5. Succeptible to leaching
(c)
(i)
(ii)
Valency = 3 (three)
(d)
(i)
Ways in which fluid pressure is applied in everyday activities
1. Water pumps
2. Car brakes
3. Drinking straw
4. Pumping tyre
5. Syringes
6. Siphon
7. Enema
(ii)
Substances that are an insulators
1.Dry wood
2. Air
3. Rubber
4. Plastic
5. Glass
6. Cloth