KUULCHAT
SCIENCE MOCK
OBJECTIVE TEST
1.
Which of the following substances is not a constituent of a balanced diet?
A.
Carbohydrate
B.
Protein
C.
Table salt
D.
Vitamins
Answer: C
2.
Arrange the following sources of water in the order of increasing contamination.
I. Rain
II. Stream
III. Well
IV. Borehole
A.
I, II, IV, III
B.
II, III, I, IV
C.
I, IV, III, II
D.
III, II, IV, I
Answer: C
Increasing order of contamination means from the least contaminated to the most contaminated
3.
Which of the following plants is propagated vegetatively?
A.
apple
B.
coconut
C.
pawpaw
D.
pear
E.
sweet potato
Answer: E
4.
A stone with mass 80.0 g was put into a measuring cylinder containing water. If the water level rises by 20.0 cm, calculate the density of the stone.
A.
0.25 g cm-3
B.
1.20 g cm-3
C.
1.80 g cm-3
D.
3.30 g cm-3
E.
4.00 g cm-3
Answer: E
Density =
Mass = 80.0 g
Volume = 20.0 cm3
Density =
Density = 4.0 g cm-3
5.
A chemical that can be used to test for the presence of protein in food substances is
A.
Benedict’s solution
B.
Fehling’s solution
C.
Eosin solution
D.
Iodine solution
E.
Million’s reagent
Answer: E
6.
The anemometer is an instrument used in determining
A.
amount of rainfall.
B.
speed of wind.
C.
relative humidity.
D.
intensity of light.
Answer: B
7.
Which of the following arrangements show the correct order of increasing complexity of structures in living organisms.
A.
cells → organs → tissues → systems
B.
cells → tissues → organs → systems
C.
cells → systems → tissues → organs
D.
cells → tissues → systems → organs
Answer: B
8.
The linear sequence of living things feeding and being fed on is called
A.
linear feeding
B.
food chain
C.
photosynthesis
D.
nutrition
E.
transpiration
Answer: B
9.
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
10.
Heat travels through vacuum by
A.
conduction.
B.
convection.
C.
radiation.
D.
convection and radiation.
Answer: C
Conduction → heat transfer in solid
Convection → heat transfer in fluid
Radiation → heat transfer through vacuum
11.
Use the information below to answer the question that follow.
A solid X reacted with a liquid Y to form a salt and water only. A portion of liquid Y turned blue litmus paper red. Solid X did not dissolve when a portion of it was placed in water and stirred.
If red litmus paper is placed in liquid Y, the colour of the paper will
A.
remain the same.
B.
change to blue.
C.
change to purple.
D.
become brighter.
Answer: A
12.
The instrument used to measure relative humidity is
A.
anemometer.
B.
barometer.
C.
hygrometer.
D.
manometer.
Answer: C
Anemometer: Wind speed
Barometer: Atmospheric pressure
Hygrometer: Relative humidity
Manometer: Pressure acting on a column of fluid
13.
The end product of protein digestion is
A.
amino acid.
B.
glucose.
C.
maltose.
D.
poly-peptide.
E.
sucrose.
Answer: A
14.
Blood in the urine is a symptom of
A.
bilharzia.
B.
cholera.
C.
gonorrhoe.
D.
typhoid
Answer: A
15.
Which of the following planets is at the center of the solar system?
A.
Earth
B.
Venus
C.
Mars
D.
Sun
Answer: D
The Sun is the only star in our solar system. It is the center of our solar system, and its gravity holds the solar system together.
16.
An object is placed 20 cm in front of a plane mirror. The distance between the object and the image is
A.
20 cm.
B.
40 cm.
C.
60 cm.
D.
80 cm.
Answer: B
Characteristics of image formed by a plane mirror
1. The image formed by a plane mirror is virtual and erect.
2. The image formed by a plane mirror is of the same size as the object.
3. The image is formed behind the mirror and the distance of the image from the mirror is equal to the distance of the object from the mirror.
Distance between the object and the image = Object distance + image distance
Distance between the object and the image = 20 cm + 20 cm = 40 cm
17.
The method used to separate an insoluble solid from a liquid is
A.
crystallization.
B.
distillation.
C.
filtration.
D.
sublimation.
Answer: C
FILTRATION
18.
The lead of the transistor responsible for activation is the
A.
amplifier.
B.
base.
C.
collector.
D.
emitter.
Answer: B
19.
In flowering plants, the stamen is made up of
A.
anther and stigma.
B.
anther and filament.
C.
stigma and filament.
D.
stigma and style.
Answer: B
20.
Grasshopper management is crucial because of all the following reasons except
A.
damage to crops.
B.
incomplete metamorphosis.
C.
ecosystem disruption.
D.
livestock harm.
Answer: C
21.
Disposal of urine and faeces into a river used for domestic purposes, may cause the outbreak of
A.
bilharzia.
B.
malaria.
C.
river blindness.
D.
tetanus.
E.
tuberculosis.
Answer: A
Schistosomiasis, also known as bilharzia, is an infection caused by a parasitic worm that lives in fresh water in subtropical and tropical regions.
22.
Which of the following practices encourages soil erosion?
A.
Planting trees on bare soil
B.
Clearing trees and slopes
C.
Planting grasses along slopes
D.
Ploughing across slopes
E.
Preventing bush fires
Answer: B
23.
Leguminous crops such as beans may often be cultivated to
A.
Add humus to the soil
B.
Add nitrogen to the soil
C.
Add protein to the soil
D.
Make the soil loamy
E.
Increase the calcium content of the soil
Answer: B
24.
Which of the following changes does not occur in a girl at the age of puberty?
A.
The breasts develop
B.
The hips widen
C.
Menstruation
D.
The teeth becomes whiter
E.
Hair grows in the pubic area
Answer: D
25.
The darkest part of a shadow formed during an eclipse is called
A.
annular eclipse
B.
lunar eclipse
C.
penumbra
D.
solar eclipse
E.
umbra
Answer: E
26.
For healthy growth, the food we eat must contain
A.
fat, oils and proteins
B.
important nutrients in the right proportions
C.
a good proportion of carbohydrates and proteins
D.
mineral salts, vitamins and water
E.
mineral salts in right proportion
Answer: B
27.
Am example of soil micro-nutrients is
A.
copper.
B.
calcium.
C.
phosphorus.
D.
potassium.
Answer: A
28.
Kerosine is able to reach the other end of a wick by
A.
diffusion.
B.
suction pressure.
C.
capillary action.
D.
osmosis.
Answer: C
29.
Gin can be obtained from palm wine by
A.
condensation
B.
freezing
C.
sedimentation
D.
distillation
E.
filtration
Answer: D
30.
The energy stored in food is
A.
an electrostatic energy.
B.
a chemical energy.
C.
a solar energy.
D.
a thermal energy.
Answer: B
31.
A fish is able to swim with little resistance in water because it has
A.
fins.
B.
gills.
C.
a streamlined body.
D.
the ability to make use of a limited oxygen supply.
Answer: C
Adaptations of fish
1. They have a streamlined body shape to help reduce water resistance
2. Fishes have gills to respire underwater
3. Fishes have scales and mucous on their bodies to make them waterproof and reduce water resistance while swimming
32.
Which of the following farm animals is/are housed in a hutch?
I. Goats
II. Pigs
III. Rabbits
A.
I only
B.
III only
C.
I and II only
D.
II and III only
Answer: B
33.
Droplet infection is the method by which
A.
disease are transmitted from animals to plants.
B.
infected animals are processed.
C.
human beings protects themselves from diseases.
D.
diseases are spread through the air.
Answer: D
34.
The chemical symbol C is the symbol for
A.
calcium.
B.
chlorine.
C.
carbon.
D.
sodium.
Answer: C
35.
An object weighing 60 N is dragged through a distance of 2 m. Calculate the work done
A.
6 J
B.
15 J
C.
30 J
D.
120 J
E.
1200 J
Answer: D
Work done = Force x Distance
Force = Weight = 60 N
Distance = 2 m
Work done = 60 N x 2 m = 120 J
36.
The amount of water vapour in the atmosphere is called
A.
fog.
B.
humidity.
C.
rain.
D.
temperature.
Answer: B
37.
Which of the following is cultivated on plantation basis?
A.
Okro
B.
Tomato
C.
Rubber
D.
Cassava
E.
Maize
Answer: E
38.
The liquid component of the blood is known as
A.
cytoplasm.
B.
haemoglobin.
C.
plasma.
D.
platelets.
Answer: C
39.
The male sperms fertilize the female eggs to form the
A.
embryo
B.
ovary
C.
ovum
D.
placenta
E.
uterus
Answer: A
40.
A breeding female pig is called a
A.
doe.
B.
gilt.
C.
heifer.
D.
sow.
Answer: D
THEORY QUESTIONS
1.
(a)
Study the simple circuit diagram shown below and answer the questions that follow.
(i)
Identify the components labelled I, II, III, IV, V and VI
(ii)
Which component is used to close the circuit?
(iii)
State the observation that will be made when the circuit is closed.
(iv)
State the energy transformations that take place when the circuit is closed
(v)
Give the name of the circuit connection between components IV and VI
(b)
The diagram below is an illustration of an experimental set-up used for separating a mixture of water and alcohol. Study the diagram carefully and answer the questions that follow.
(i)
State the method of separation shown in the set-up.
(ii)
Identify liquid Y, with reasons.
(iii)
Give the functions of the thermometer and the water jacket X
(iv)
What physical processes are involved in the method of separating the mixture?
(v)
State the physical property which makes it possible to separate the water and alcohol.
(c)
A student performed tests on food substances A, B and C and made the following observations
| Food substance | Test | Observation |
| A | Few drops of iodine solution was added to A | The iodine solution turns blue-black |
| B | A drop of B was applied to a white sheet of paper | A translucent patch was seen on the paper |
| C | Benedict's solution was added to C and the mixture boiled | Benedicts's solution turns from blue to brick-red |
(i)
Identify food substances A, B and C.
(ii)
Give the products of digestion of A, B and C
(iii)
In which parts of the alimentary canal does the digestion of each of food substances A, B and C start?
(iv)
In which part of the alimentary canal is food substance C absorbed after digestion?
(a)
(i)
I → Cell/battery
II → Key/switch
III → Ammeter
IV → Lamp/bulb
V → Rheostat/variable resistor
VI → Voltmeter
(ii)
II/Key/Switch
(iii)
The lamp (IV) will light
OR
The ammeter (III) will deflect
OR
The voltmeter (VI) will deflect
(iv)
Chemical energy (of cell) → Electrical energy (in wires) → Light/heat energy (in bulb)
(v)
Parallel connection
(b)
(i)
Distillation/Fractional distillation
(ii)
Y → Alcohol because it has a lower boiling point than water/it boils off/evaporates first before water.
(iii)
Function of the thermometer
Is used to note/measure/determine the temperature (at which the mixtures boil/separate)
OR
It is used to note/measure/determine the boiling points of the mixtures
Function of the water jacket X
It is used to condense/cool the vapour
(iv)
Liquid →heat Vapour →cool Liquid
OR
Heating → Vaporisation → Condensation
(v)
Water and alcohol have different boiling points.
(c)
(i)
A → Starch
B → Oil/Fat/Lipid
C → Reducing/simple sugar/glucose
(ii)
A (Starch) → Glucose/fructose
B (Oil/Fat/Lipid) → Fatty acids/glycerol
C (Reducing/simple sugar/glucose) → Glucose/No digestion occurs/remains the same
(iii)
A → Mouth
B → Duodenum/small intestine
C → Not digested/passes through the system
(iv)
C (Reducing/simple sugar/glucose) is absorbed in the small intestine (ileum)
2.
(a)
(i)
Define pressure
(ii)
State three applications of pressure in everyday life
(b)
State four functions of the liver in digestion.
(c)
(i)
What is a compound?
(ii)
Give two properties of a compound
(iii)
Write down the name and the chemical formula of the compound formed between the following elements:
(α)
hydrogen and chlorine
(β)
magnesium and oxygen
(a)
(i)
Pressure is the force acting perpendicularly/normally over certain surface
OR
Pressure is the force acting perpendicularly/normally per unit area
Pressure (P) =
(ii)
Applications of pressure in everyday life
1. Opening a tin of milk with a nail
2. Braking system of a vehicle
3. Pumping bicycle/vehicle tyres with inflator
4. Using syrings to draw medicine
5. Pumping of water from a borehole
6. Hydraulic jack/press
7. Using straw
(b)
Functions of the liver in digestion
1. Removes excess glucose from the blood
2. Stores excess glucose as glycogen/animal starch
3. Converts glycogen to glucose (when glucose is needed)
4. Produces bile (which emulsifies fats and oils)
5. Removes toxins/toxic materials from the blood/purifies the blood
6. Stores blood
7. Lipid metabolism/breaks fat
8. Removes excess amino acids
(c)
(i)
Compound is a substance which contains two or more elements chemically combined.
(ii)
Properties of a compound
1. New substance formed with property different from any of the constituents
2. Substance formed cannot be broken down to obtain the reactants by any physical means
3. Compounds contain their constituents in one fixed proportion/composition/ratio
4. Their formation involves heat exchanges
(iii)
(α)
Compound formed when hydrogen and chlorine react
Hydrogen + Chloride → Hydrogen chloride (HCl)
H2(g) + Cl2(g) → 2HCl(g)
(β)
Compound formed when magnesium and oxygen react
Magnesium + Oxygen → Magnesium oxide (MgO)
2Mg + O2 → 2MgO
3.
(a)
List in the correct order, the organs through which food passes from the mouth to the anus.
(b)
State the components of a balanced ration for feeding poultry.
(c)
Predict the products formed when:
(i)
magnesium solution reacts with dilute hydrochloric acid;
(ii)
potassium reacts with water.
(d)
(i)
State two effects of heat on a substance.
(ii)
Potassium permangante crystals are dropped into a beaker of water and warmed:
(α)
State what would be observed;
(β)
State the phenomenon demonstrated in (α).
(a)
Order of food passes from the mouth to the anus
Mouth → oesophagus → stomach → small intestine → large intestine → anus
(b)
Components of a balanced ration
1. Carbohydrates
2. Protein
3. Fats and oil
4. Minerals
5. Vitamins
6. Water
(c)
Products formed
(i)
Magnesium chloride and hydrogen/MgCl2 and H2
Illustration
Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
(ii)
Potassium hydroxide and hydrogen/KOH and H2
Illustration
2K(s) + 2H2O → 2KOH(aq) + H2(g)
(d)
(i)
Effects of heat on a substance
1. Change of state/melts/vapourises
2. Expansion/contraction/change in shape
3. Increasing temperature/decreasing temperature
4. Increase in pressure
(ii)
Potassium permangante crystals dropped into a beaker of water and warmed:
(α)
Warmed coloured water moves from the bottom of the beaker upwards
The solution turns to purple in color because of a process called diffusion.
Diffusion is the movement of molecules or atoms from high concentrated region to low concentrated region.
(β)
Phenomenon demonstrated
Heat transfer by convection/ Diffusion
4.
(a)
Figure 1(a) is an illustration of a natural cycle showing unnamed stages and processes labelled A, B, C and D with processes labelled P, Q, S and T. Study the figure carefully and answer the questions that follow.
(i)
Name each of the stages labelled A, B, C and D.
(ii)
Name each of the processes labelled P, S and T.
(iii)
State three activities of humans that could disrupt the cycle.
[10 marks]
(b)
Figure 1(b) is an illustration of two types of farming systems practised in Ghana labelled K and L.
System K represents four farmlands labelled A, B, C and D and the arrows indicate movement of the farmer over a period of time as shown.
System L, represents a farmland divided into four plots 1, 2, 3 and 4 and the arrows indicate the movement of the crops cultivated over the period.
Study the figure carefully and answer the questions that follow.
(i)
Name each of the farming systems labelled K and L
(ii)
Give the reason for each of the names given in (i).
(iii)
State two ways in which the farming system K is of importance to the farmer.
(iv)
Give three reasons why the farming system K is not being encouraged in recent times.
(v)
Name one type of crop that could be included in the farmland L to improve the fertility of the soil.
[10 marks]
(c)
Figure 1(c) is an illustration of a mason pulling a slab by means of a rope up an inclined plane. The labels I, II and III represent forces acting on the slab.
Study the figure carefully and answer the questions that follow.
(i)
Give three examples of the use of inclined planes in everyday life.
(ii)
Given that I is 400 N and moves a distance of 10 m whiles II is 100 N and moves a distance of 5 m, calculate the
(α)
work output;
(β)
work input;
(γ)
efficiency.
[10 marks]
(d)
Figure 1(d) is an illustration of experimental set-ups A and B used to demonstrate a scientific principle.
Study the figure carefully and answer the questions that follow.
(i)
Name the scientific principle being demonstrated in both A and B.
(ii)
Describe briefly the functions of each of the parts labelled II and VI.
(iii)
Name any two types of materials that could be present in each of the set-ups labelled:
(α)
III;
(β)
VII.
(iv)
Give the reason why the direction of water flow in A must not be reversed.
[10 marks]
(a)
(i)
A → Plants
B → Carbon dioxide in the atmosphere
C → Animals
D → Dead/decaying organisms/organic matter
4 @ 1 mark each = 4 marks
(ii)
P → Photosynthesis
S → Decay/decomposition
T → Combustion/burning
3 @ 1 mark each = 3 marks
(iii)
Activities of humans that could disrupt the cycle
1. Raising of livestock
2. Growing of crops
3. Burning of wood
4. Burning of fossil fuels/coal/industrial pollution
5. Reducing amount of forest cover/deforestation
Any 3 x 1 = 3 marks
(b)
(i)
K → Land rotation
L → Crop rotation
2 @ 1 mark each = 2 marks
(ii)
Reason for K
The farmer moves from one farmland to another
Reason for L
The farmer moves/rotates the crops from one plot to another
2 @ 1 mark each = 2 marks
(iii)
Ways in which the farming system K is of importance to the farmer
1. The soil regains its fertility/prevents soil exhaustion
2. There is control in the build-up pests and diseases
3. It helps to maintain good yield
4. Saves money
Any 2 x 1 = 2 marks
(iv)
Reasons why the farming system K is not being encouraged in recent times
1. Time, energy and money is wasted in clearing new land each time land is abandoned.
2. System does not encourage large scale farming
3. There is rampant deforestation
4. Cultivated lands are generally small and scattered
5. Land is getting scarce/a growing population
Any 3 x 1 = 3 marks
(v)
Leguminous crops
1 mark
(c)
(i)
Examples of the use of inclined planes in everyday life
1. Stair case
2. Ladder
3. Plank of wood at an angle
4. Hill
5. Ramps
6. Screws
Any 3 x 1 = 3 marks
(ii)
(α)
Work output = Load x Load distance (1 mark)
Work output = 100 x 5
Work output = 500 J (1 mark)
(β)
Work input = Effort x Effort distance (1 mark)
Work input = 400 x 10
Work input = 4000 J (1 mark)
(γ)
Efficiency = x 100% (1 mark)
Efficiency = x 100% (1 mark)
Efficiency = 12.5% (1 mark)
Notes:
1. The zeros (0) in 500 and 4000 cancel each other
2. The zeros (0) in 40 and 100 cancel each other
3. 2 divides 4, 2 times and 10, 5 times
4. = = 12.5
(d)
(i)
Separation of mixtures
1 mark
(ii)
II
Cools the vaporized components of the mixture (1 mark) back to liquid (1 mark)
VI
Bar magnet attracts the magnetic material of the components of a mixture (1 mark) in order to separate it from the non-magnetic component (1 mark)
(iii)
(α)
III
1. Alcohol/ethanol and water
2. Kerosene and diesel oil
Any 1 x 2 marks = 2 marks
(β)
VII
Iron filings and powdered Sulphur
2 marks
(iv)
To ensure complete condensation of the vapour
1 mark
5.
(a)
List the three particles which make up matter.
(b)
State four hereditary features in humans.
(c)
State the energy transformation that takes place in each of the following activities:
(i)
dry cell in use;
(ii)
solar panel in use;
(iii)
electric stove in use;
(iv)
hammering of a piece of metal.
(d)
State two ways each in which each of the following cultural practices is important in vegetable production:
(i)
staking;
(ii)
pruning.
(a)
The three particles which make up matter
1. Atoms
2. Molecules
3. Ions
(b)
Hereditary features in humans
1. Weight
2. Intelligence
3. Colour of the skin
4. Ability to roll the tongue
5. Temperature
6. Height/stature of an individual
7. Colour of eyes
8. Colour of hair
9. Blood group
10. Shape of face/nose/head/eye
11. Haemophilia
12. Albinism
(c)
Energy transformations
(i)
Dry cell in use
Chemical energy → Electrical energy
(ii)
Solar panel in use
Light energy → Electrical energy
(iii)
Electric stove in use
Electrical energy → Heat energy
(iv)
Hammering of a piece of metal
Chemical → Potential → Kinetic → Heat/Light/Sound
OR
Chemical → Mechanical → Heat/Light/Sound
OR
Chemical → Kinetic → Heat/Light/Sound
(d)
(i)
Ways in which staking is important in vegetable production
1. It supports weak/climbing stems
2. Promotes air circulation
3. Allow for easy penetrating of sunlight
4. Helps to produce clean fruits
5. It helps protects fruits from diseases/pest
6. Cultural practices such as weeding and spraying can easily be carried out
7. It facilitates harvesting
8. It reduces/minimuzes/prevents fruits from diseases/rot
9. Improves fruit quality
10. Supports plants during strong winds
(ii)
Ways in which pruning is important in vegetable production
1. It encourages easy harvesting
2. It improves air circulation in the farm
3. It promotes light penetration
4. It checks the spread of diseases
5. It prevents the spread of pests
6. It promotes the production of bigger fruits
7. It beautifies ornamental plants
8. It aids clearing of weeds
6.
a)
State and explain three ways by which plants protect themselves from danger
b)
i)
What is an anion?
ii)
Give the names of the products formed when the following pairs of compounds react together:
α)
NH4OH and dilute HCl
β)
CaCO3 and dilute HCl
c)
i)
What is electromagnetism?
ii)
With the aid of a circuit diagram describe how a piece of metal can be magnetized
a)
Ways by which plants protect themselves from danger
1. Secretion of unpleasant liquids which make them distasteful
2. Possession of poisonous parts which cause pain/itching/death/swelling on contact
3. Possession of spines/thorns/irritating hairs which cause pain/irritation on contact
4. Possession of sticky substances which stick in the mouth of animals which try to feed on them
5. Possession/production of unpleasant smell/scent which drives off animals which try to feed on them
b)
i)
An anion is a negatively charged atom or group of atoms
OR
An anion is a negatively charged ion
OR
An anion is an ion formed when an atom or group of atoms gain electron(s)
ii)
α)
NH4OH and dilute HCl → Ammonium chloride and water
β)
CaCO3 and dilute HCl → Calcium chloride, water and carbon dioxide/carbon (IV) oxide
c)
i)
Electromagnetism is the production of a magnet by the use of electric current.
ii)
The key is switched on and off few times. When the pin is removed and tested, it is found to be magnetized.