KUULCHAT
SCIENCE MOCK
OBJECTIVE TEST
1.
Artificial satellites can be used for
I. communication.
II. oil and gas exploration.
III. meteorological studies.
A.
I only
B.
II only
C.
I and II only
D.
I, II and III
Answer: D
2.
Dehusking and shelling are both activities carried out in the processing of
A.
cowpea.
B.
groundnut.
C.
maize.
D.
sorghum.
Answer: C
3.
A bottle of water removed from a refrigerator soon becomes covered with droplets of water because the
A.
bottle is porous.
B.
bottle is full of water.
C.
water in the surrounding atmosphere is colder than the water in the bottle.
D.
water in the surrounding atmosphere is warmer than the water in the bottle
Answer: D
4.
A patient who coughs and spits out blood may be suffering from
A.
asthma
B.
pneumonia
C.
measles
D.
tuberculosis
E.
influenza
Answer: D
5.
Solid non-metals normally break into pieces when hammered because they are
A.
brittle
B.
ductile
C.
lustrous
D.
malleable
Answer: A
6.
The gas produced when glucose is oxidized during internal respiration is
A.
carbon (II) oxide.
B.
Carbon (IV) oxide.
C.
hydrogen.
D.
nitrogen.
Answer: B
7.
The unit of measurement of energy is
A.
joule.
B.
kelvin.
C.
newton.
D.
watt.
Answer: A
8.
A rheostat is used in an electric circuit in order to
A.
increase electric current only.
B.
decrease electric current only.
C.
keep electric current constant.
D.
increase and decrease electric current.
Answer: D
9.
Which of the following energy changes takes place when a church bell is tolled?
A.
Chemical energy is changed to sound energy
B.
Kinetic energy is changed to sound energy
C.
Potential energy is changed to sound energy
D.
Potential energy is changed to kinetic energy
E.
Thermal energy is changed to sound energy
Answer: B
10.
The part of the soil that is most important for the growth of plants is
A.
clay.
B.
humus.
C.
sand.
D.
silt.
Answer: B
Humus
Humus is dark, organic material that forms in soil when plant and animal matter decays. When plants drop leaves, twigs, and other material to the ground, it piles up. This material is called leaf litter. When animals die, their remains add to the litter.
It is a kind of soil organic matter. It is rich in nutrients and retains moisture in the soil.
11.
The rise in heat waves and floods globally may be due to the effect of
A.
climate change.
B.
greenhouse gases.
C.
increased drought.
D.
severe storms.
Answer: B
Greenhouse gases are gases in the Earth's atmosphere that trap heat and warm the planet. They let sunlight pass through but prevent some of the heat from escaping back into space, similar to how the glass roof of a greenhouse traps heat. The main greenhouse gases are water vapor, carbon dioxide, methane, ozone, and nitrous oxide.
12.
The relative proportions of the different particle sizes in a soil sample refer to soil
A.
temperature.
B.
texture.
C.
structure.
D.
porosity.
Answer: C
13.
The characteristics that distinguishes living things from non-living things is that, living things
A.
are able to move, non-living things are not.
B.
are of different sizes, non-living things have same size.
C.
can manufacture their own food, non-living things cannot.
D.
have a definite form, non-living things have irregular forms.
Answer: A
14.
Which of the following planets is nearest to the earth?
A.
Jupiter
B.
Mercury
C.
Pluto
D.
Saturn
E.
Venus
Answer: E
15.
The chemical symbol of potassium is
A.
Na.
B.
K.
C.
Pb.
D.
S.
Answer: B
16.
The sun and the planets form the
A.
universe
B.
atmosphere
C.
milky way
D.
constellation
E.
solar system
Answer: E
17.
Which of the following characteristics are common to all living things?
I. Response to stimuli.
II. Respiration
III. Movement from place to place
IV. Grow
A.
I and II only
B.
I and III only
C.
I, II and III only
D.
I, II and IV only
Answer: D
18.
Which of the following gases helps in rusting?
A.
Carbon dioxide
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
Answer: C
The rusting of iron (Fe) is shown by the chemical equation below:
4Fe + 3O2 + 6H2O → 4Fe(OH)3
19.
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
20.
The main parts of the central nervous system are the
A.
brain and nerves
B.
spinal cord and the nerves
C.
brain and the spinal cord
D.
brain, the nerves and the spinal cord
E.
brain, the eyes, the ears and the nerves
Answer: C
21.
The amount of water vapour in the atmosphere is called
A.
fog.
B.
humidity.
C.
rain.
D.
temperature.
Answer: B
22.
A material that allows a small amount of light energy to pass through it but cannot be seen through is referred to as
A.
opaque.
B.
reflective.
C.
translucent.
D.
transparent.
Answer: C
23.
The following substances are mixtures except
A.
air.
B.
carbon dioxide.
C.
salt solution.
D.
smoke.
Answer: B
Carbon dioxide is a compound with the chemical formula CO2.
24.
. During an eclipse of the sun, the region that has total darkness is known as
A.
umbra
B.
orbit
C.
penumbra
D.
shadow
E.
satellite
Answer: A
25.
The process that takes place when the sperm and the egg of humans fuse together is referred to as
A.
fertilization.
B.
menstruation.
C.
ovulation.
D.
reproduction.
Answer: A
26.
Which of the following organisms is prokaryotic?
A.
Bacteria
B.
Earthworm
C.
Fungus
D.
Plant
Answer: A
A prokaryotic organism is a single-celled life form that lacks a nucleus and other membrane-bound organelles. Prokaryotes are typically found in the domains Bacteria and Archaea. They are characterized by their relatively simple structure and the absence of internal membranes that define eukaryotic cells.
27.
To stop the spread of a disease caused by a dirty environment, one must
A.
eat healthy diet.
B.
ensure regular exercise.
C.
avoid alcohol.
D.
practice personal hygiene.
Answer: D
28.
When salt is put into soups, it
A.
five months
B.
six months
C.
seven months
D.
nine months
E.
eleven months
Answer: D
29.
Which of the following statements about acids correct
I. They react with the calcium carbonate to give a gas
II. They turn red litmus paper blue
III. They react with reactive metals to give a gas
IV. They turn blue litmus paper red
A.
I, II and IV only
B.
I, II and III only
C.
II, III and IV only
D.
D. I, III and IV
Answer: D
An acid is a substance that donates protons (in the Brønsted-Lowry definition) or accepts a pair of valence electrons to form a bond (in the Lewis definition). acid, any substance that in water solution tastes sour, changes the color of certain indicators (e.g., reddens blue litmus paper), reacts with some metals (e.g., iron) to liberate hydrogen, reacts with bases to form salts, They react with the calcium carbonate to give a gas and promotes certain chemical reactions (acid catalysis).
30.
The base of the N-P-N transistor normally
A.
is a p-type semi conductor.
B.
is an n-type semi conductor.
C.
is undoped semi conductor.
D.
have electrons as majority charge carriers.
Answer: A
31.
A hunter experiences a backward force upon firing a gun. Which of the Newton's laws of motion is demonstrated in the situation?
A.
First law
B.
Second law
C.
Third law
D.
Law of inertia
Answer: C
Newton's third law states that for every action (force) in nature there is an equal and opposite reaction. If object A exerts a force on object B, object B also exerts an equal and opposite force on object A.
When a bullet is fired from a gun, the gun exerts a force on the bullet in the forward direction. This is the action force. The bullet also exerts an equal force on the gun in the backward direction. This is the reaction force.
32.
The space occupied by matter is its
A.
area
B.
length
C.
radius
D.
width
E.
volume
Answer: E
33.
Oxygen from the air is able to get into the blood by
A.
capillarity.
B.
diffusion.
C.
osmosis.
D.
suction.
Answer: B
The oxygen in inhaled air passes across the thin lining of the air sacs and into the blood vessels. This is known as diffusion. The oxygen in the blood is then carried around the body in the bloodstream, reaching every cell.
34.
A solar cell produces electrical energy from
A.
electromagnets
B.
heat
C.
light
D.
sound
Answer: C
35.
Which of the following diseases is spread through air?
A.
AIDS
B.
Measles
C.
Typhoid
D.
Yaws
Answer: B
36.
Which of the following diseases will result from eating improperly cooked meat?
A.
Tapeworm infestation
B.
Guinea worm infestation
C.
Small pox
D.
Leprosy
E.
Measles
Answer: A
37.
Which of the following fruits is adapted for dispersal by air?
A.
Succulent fruit
B.
Brightly coloured fruit
C.
Sticky fruit
D.
Hairy fruit
Answer: D
38.
Which of the following organs are used for excretion?
I. Lung
II. Skin
III. Kidney
IV. Heart
A.
I and IV only
B.
II and III only
C.
III and IV only
D.
I, II and III only
Answer: D
39.
The simplest way of making well water suitable for laundry is by
A.
adding copper sulphate.
B.
filtering.
C.
boiling .
D.
adding chlorine.
Answer: C
40.
What is the difference between mass and weight? The
A.
mass of a body is twice the weight
B.
weight of a body is constant but its mass varies
C.
mass of a body varies but its weight does not
D.
weight of a body varies but its mass does not
E.
mass of a body is half the weight
Answer: D
THEORY QUESTIONS
1.
(a)
Distinguish between the following terms:
(i)
Physical change and chemical change
(ii)
Solution and suspension
(b)
Classify the following as either a physical or chemical change
(i)
Common salt in water
(ii)
Burning of charcoal
(iii)
Melting of ice
(iv)
Hydrochloric acid in sodium hydroxide solution
(c)
(i)
What is a parasite?
(ii)
Give two examples of parasites and their hosts.
(d)
Give the chemical symbols of the following elements
(i)
Oxygen
(ii)
Chlorine
(iii)
Aluminium
(iv)
Calcium
(e)
(i)
Explain the term self-pollination
(ii)
Name four agents of pollination
(iii)
State the function of the brightly coloured petals in insect pollination
(a)
(i)
Differences between a physical change and a chemical change
| Physical Change | Chemical Change |
| No new substance is formed | New substance is formed |
| It is easily reversible | It is irreversible |
| It is not accompanied by great heat change | It is accompanied by great heat change |
| There is no change in mass | There is change in mass |
| Individual components retain their properties | Individual components lose their properties |
(ii)
Difference between solution and suspension
A solution is a uniform/homogeneous mixture of a solute and a solvent where the solute completely disappear from sight in the solvent (liquid) whiles a suspension is a mixture of particles of an insoluble substance and a liquid whereby the particles of the substance float in the liquid. The small particles settle at the bottom of the container when it is left undisturbed.
(b)
(i)
Common salt in water → physical change
(ii)
Burning of charcoal → chemical change
(iii)
Melting of ice → physical change
(iv)
Hydrochloric acid in sodium hydroxide solution → chemical change
(c)
(i)
Parasite is any organism/living thing that lives in or on another organism/living thing called the host for its food and by so doing causes harm to the host.
(ii)
Examples of parasites and their hosts
| Parasite | Host |
| Lice | Man |
| Tick | Dog |
| Plasmodium | Man |
| Mistletoe | Cocoa/cola |
| Dodder | Milk bush/cashew plant |
| Capsids | Cocoa plant |
| Tapeworm | Cow/pig/man |
(d)
Chemical symbols
(i)
Oxygen → O
(ii)
Chlorine → Cl
(iii)
Aluminium → Al
(iv)
Calcium → Ca
(e)
(i)
Self-pollination is the transfer of pollen grains from the anther of a flower to the stigma of the same flower or to the stigma of another flower of the same plant.
(ii)
Agents of pollination
1. Insects
2. Water/Rain
3. Animal/Man/Birds/Bats
4. Wind
(iii)
Function of the brightly coloured petals in insect pollination
They produce nectar which attracts insects to the plant.
2.
(a)
In an experiment, an iron bar is magnetized by dragging a magnet over the surface of the bar from end A to end B several times as shown in the diagram below.
(i)
Mention the method of magnetization.
(ii)
Give the polarity of the ends A and B of the bar after the magnetization.
(iii)
How will you test that the bar AB is a magnet?
(iv)
Indicate how you will test for the poles of A and B of the bar.
(v)
Give one precaution that should be taken during the magnetization process.
(vi)
Name one other method of magnetization.
(b)
The set-up below is used to prepare gases in the laboratory.
(i)
Give the names of the parts labelled I, II, III and IV.
(ii)
Write down the two names of the method of gas collection.
(iii)
Explain how the gas collects over the water.
(iv)
Name two gases that can be prepared using the set-up.
(c)
The set-up below shows air being breathed out through the mouth into test-tube containing lime water.
(i)
Why does the lime water turn milky?
(ii)
Identify the milky substance produced.
(iii)
Write a balanced chemical equation for the reaction.
(iv)
Name two other substances present in breathed-out air.
(v)
What is the aim of the experiment?
(a)
(i)
Single stroke/single touch
(ii)
A → South pole
B → North pole
(iii)
How to test that the bar AB is a magnet
1. The bar suspended horizontally at its midpoint will be in the North-South direction when at rest
2. Suspend AB freely at its midpoint. One pole of a known magnet brought at a time to the ends A and B will show both attraction and repulsion for both ends
3. The bar AB is brought close to a plotting compass. The compass shows deflection
4. Dip the ends A and B of the bar into iron filings. Iron filings will cling to the poles/magnetic substances are attracted by both ends of the bar
(iv)
How to test for the poles of A and B of the bar
1. South pole of a magnet is brought towards end A of the bar and there is repulsion between them
2. A north pole of a magnet is brought towards end B of the bar and there is repulsion between them
(v)
Precautions that should be taken during the magnetization process
1. The magnet should be drawn along the bar AB in only one direction
2. The magnet should be lifted way off the bar AB at the end of each stroke
(vi)
Other methods of magnetization
1. Divided touch/double touch/double stroke
2. Electrical method/electromagnetisation
3. Induction
4. Hammering
(b)
(i)
I → Thistle funnel
II → Delivery tube
III → Flat-bottom flask
IV → Gas jar
(ii)
1. Upward delivery
2. Downward displacement (of water)
(iii)
The gas exerts pressure on the water and pushes it down
(iv)
1. Hydrogen
2. Oxygen
3. Carbon dioxide/Carbon (IV) oxide
(c)
(i)
Lime water turns milky due to the presence of carbon dioxide in the expired air.
(ii)
Calcium carbonate/CaCo3/Calcium trioxocarbonate (IV)
(iii)
Ca(OH)2 + CO2 → CaCo3 + H2O
(iv)
Other substances present in breathed-out air
1. Water vapour/water
2. Nitrogen
3. Rare gases
4. Oxygen (unused)
(v)
To show that carbon dioxide is a by-product of respiration
OR
To show that carbon dioxide is present in expired air/breathed out
3.
(a)
State two important components each of the soils that helps:
(i)
Crops to grow well;
(ii)
To maintain good soil structure.
(b)
(i)
Explain how energy in a windmill is obtained
(ii)
State one source of renewable energy.
(c)
(i)
Explain why steel is preferred to iron in building construction.
(ii)
State two ways of preventing rusting.
(d)
State three ways of preventing indigestion.
(a)
Important components of the soils that helps
(i)
Crops to grow well
1. Nutrients/humus
2. Air/living organisms
3. Water
(ii)
To maintain good soil structure
1. Soil particles
2. Organic matter/humus
3. Living organisms
(b)
(i)
How energy in a windmill is obtained
When the wind blows, the windmill turns the propeller-like blades of a turbine around a rotor, which spins a generator, which creates electricity (energy).
(ii)
Sources of renewable energy
1. Sun
2. Wind
3. Water/hydropower
4. Biomass
5. Tides
6. Geothermal source/heat from the ground
(c)
(i)
Why steel is preferred to iron in building construction
Steel is preferred to iron because it has higher resistance to corrosion (rusting) than steel and has a high tensile strength
(ii)
Ways of preventing rusting
1. Painting
2. Plating or galvanizing
3. Alloying
4. Greasing or oiling
5. Keeping metal at dry place
6. Cathodic protection
(d)
Ways of preventing indigestion
1. Avoid eating late
2. Avoid eating acidic foods
3. Avoid sleeping immediately after meal
4. Chewing food properly
5. Avoid spicy food
6. Avoid eating at regular intervals
7. Avoid eating too much food at a time/eat small food at a time
8. Limit food or drinks that contain caffeine
9. Quit smoking
10. Drink beverages after meal and not during meals
4.
(a)
State one function of each of the following organs in humans
(i)
skin
(ii)
lung
(iii)
kidney
(iv)
testis
(b)
(i)
What is vegetative reproduction?
(ii)
Name two plants which reproduce vegetatively
(c)
Name four main factors which determine the climate of a place
(d)
Define the following:
(i)
work
(ii)
power
(e)
Name the separation method used in the production of each of the following substances
(i)
akpeteshie (alcohol)
(ii)
common salt
(iii)
tap water
(a)
(i)
Functions of the skin
1. It excretes waste substances/urea/water/salts/sweat
2. It protects the body from injury
3. It regulates body temperature
4. It gives sense of touch
(ii)
Functions of the lung
1. Gaseous exchange occurs in the lungs/there is intake of oxygen and output of carbon dioxide and water vapour in the lungs
2. Excretion of carbon dioxide and water vapour takes place in the lungs
(iii)
Functions of the kidney
1. It excretes urea/water and salt
2. Urine formation
(iv)
Function of the testis
Sperm production
(b)
(i)
Vegetative reproduction is a form of reproduction whereby plants produce young ones from growing parts/buds of the parent plant.
(ii)
Plants which reproduce vegetatively
1. Potato
2. Yam
3. Cocoyam
4. Canna lily
5. Onion
6. Plantain
7. Banana
8. Ginger
9. Pineapple
10. Bryophyllum
11. Sugar cane
12. Cassava
13. Fern
14. Elephant grass
15. Tiger nuts
16. Garlic
(c)
Factors which determine the climate of a place
1. Wind
2. Rainfall
3. Temperature
4. Sunshine
5. Humidity
6. Vegetation
7. Latitude
8. Altitude
(d)
(i)
Work is said to be done when the point of application of a force moves an object through a distance in the direction of the force.
OR
Work is said to be done when a force moves a body through a distance in the direction of the force.
OR
Work is the product of force and the distance moved in the direction of the force.
OR
Work = Force x distance moved in the direction of the force
(ii)
Power is the rate of doing work.
OR
Power is the rate at which energy is dissipated
OR
Power =
(e)
Method of separation used in the production of:
(i)
akpeteshie (alcohol) → Distillation
(ii)
common salt → Evaporation/crystallisation
(iii)
tap water → Filtration/sedimentation/coagulation
5.
(a)
(i)
State three ways of conserving energy in the house.
(ii)
An electrical appliance in the house uses 4000 W of electric power every 12 hours.
Calculate the energy used within this time.
[7 marks]
(b)
(i)
Give two examples of an acid-base indicator.
(ii)
State the colour change of each indicator given in (i) in an orange juice.
[4 marks]
(c)
(i)
State four activities that could be undertaken to ensure a green economy in Ghana.
(ii)
Name two primary green-house gases associated with industrialization.
[6 marks]
(d)
Describe briefly how compost could be prepared for a backyard garden.
[3 marks]
(a)
(i)
Ways of conserving energy in the house
1. By ironing in bulk
2. Switching off lights when not in use
3. Switching off gadgets when not in use
4. Using energy efficient appliances
Any 3 x 1 mark = 3 marks
(ii)
Energy = Power x Time (1 mark)
Energy = 4000 x 12 (1 mark)
Energy = 4kW x 12h (1 mark)
Energy = 48 kWh (1 mark)
OR
Energy = Power x Time (1 mark)
Energy = 4000 x 12 x 60 x 60 (2 marks)
Energy = 172800000 or 1.72 x 108 joules/J (1 mark)
(b)
(i)
Examples of an acid-base indicator
1. Methyl orange
2. Methyl red
3. Phenolphthalein
4. Litmus
5. Universal indicator
Any 2 x 1 mark = 2 marks
(ii)
Colour change in an orange juice
1. Methyl orange → red/pink
2. Methyl red → red/pink or no colour change
3. Phenolphthalein → colourless
4. Litmus → red
5. Universal indicator → orange/yellow
Any 2 x 1 mark = 2 marks
(c)
(i)
Activities that could be undertaken to ensure a green economy in Ghana
1. Waste management/recycling/reuse
2. Investing in renewable energy
3. Adapting to the effects of climate change
4. Prioritizing human health
5. Use resources more efficiently
6. Afforestation
7. Use of public transport/electric vehicle
Any 4 x 1 mark = 4 marks
(ii)
Primary green-house gases associated with industrialization
1. Carbon dioxide/Carbon (IV) oxide
2. Methane
3. Nitrous oxide/nitrogen (I) oxide
Any 2 x 1 mark = 2 marks
(d)
How to prepare a compost for a backyard garden
1. Choose an area/compost bin/home made enclosure/dig a pit
2. Add green material/vegetable/scrap/fruit peels/grass/dry straw, etc.
3. Put materials in layers
4. Sprinkle water
5. Turn pile occasionally
Any 3 x 1 mark = 3 marks
6.
a)
i)
What are stars?
ii)
Arrange in order, starting from the sun, the first four planets in the solar system.
b)
State
i)
two differences between plants and animals;
ii)
two similarities between plants and animals.
c)
Explain each of the following farming systems:
i)
pastoral farming;
ii)
ecological farming.
d)
State the properties of water in terms of
i)
odour,
ii)
taste,
iii)
effect on litmus.
a)
i)
Stars are natural heavenly bodies/natural bodies in space that burn to produce heat and light.
OR
Stars are glowing balls of hot gas in space.
ii)
Arrangement in order from the sun to the first four planets in the solar system
1. Mercury
2. Venus
3. Earth
4. Mars
Note: The following is an acronym to remember the nine planets in order
My (Mercury) Very (Venus) Easy (Earth) Method (Mars) Just (Jupiter) Speeds (Saturn) Up (Uranus) Nothing (Neptune)
b)
i)
Differences between plants and animals
| Plants | Animals |
| Respond slowly to stimuli | Respond quickly to stimuli |
| Autotrophic/manufacture their own food from simple inorganic materials | Heterotrophic/do not manufacture their own food |
| Level of coordination is less than in animals due to absence of complex nervous system | Have complex nervous system which is responsible for their ability to exhibit complex behaviour |
| Do not move from place to place | Move freely from place to place |
| Cells possess large and permanent vacuoles/Large vacuole | Cells possess small and temporary vacuoles |
| Cells possess chloroplasts that contain chlorophyll | Cells have no chloroplasts |
| Excess carbohydrates are stored as starch | Excess carbohydrates in cells are stored as glycogen |
| Take in carbon dioxide to prepare food and release oxygen into the atmosphere | Take in oxygen and release carbon dioxide into the atmosphere |
| Cells have cell wall | Cells have no cell wall |
| Have cellulose | Have no cellulose |
| Growth takes place at definite regions/growth is localized | Growth takes place in all body parts |
| Waste products are stored and used by plants | Animal by-products are toxic/poisonous to cell and must be excreted |
ii)
Similarities between plants and animals
1. They are made up of cells
2. They feed
3. They respire
4. They move
5. They are sensitive to stimuli
6. They reproduce
7. They excrete
8. They grow
c)
i)
Pastoral farming is a type of farming system in which the farmer keeps only animals and moves from place to place with them in search of food and water.
ii)
Ecological farming is a type of farming system in which chemicals and heavy machinery are not used in order to protect the environment.
d)
i)
Properties of water in terms of odour
Water is odourless
ii)
Properties of water in terms of taste
Water is tasteless
iii)
Properties of water in terms of effect on litmus
Water is neutral to litmus
OR
Water does not change blue or red litmus paper
OR
Water has no effect on litmus paper