KUULCHAT
SCIENCE MOCK
OBJECTIVE TEST
1.
Which of the following nutrients is need by plants in small quantities?
A.
Calcium
B.
Iron
C.
Potassium
D.
Magnesium
Answer: B
2.
A mixture of sugar and water can be separated by
A.
Filtration
B.
Evaporation
C.
Decantation
D.
Distillation
E.
Condensation
Answer: B
3.
Digestion of protein begins in the stomach and ends in the
A.
large intestine.
B.
small intestine.
C.
appendix.
D.
caecum.
Answer: B
Mechanical digestion of protein begins in the mouth and continues in the stomach and small intestine. Chemical digestion of protein begins in the stomach and ends in the small intestine.
4.
Landrace is a breed of
A.
cattle.
B.
goats.
C.
pigs.
D.
sheep.
Answer: C
5.
The use of resistant breeds of farm animals to control pests is a
A.
biological method.
B.
chemical method.
C.
cultural method.
D.
physical method.
Answer: A
6.
Digested food substances are absorbed into the blood stream in the
A.
kidneys.
B.
liver.
C.
stomach.
D.
ileum.
Answer: D
7.
Weeds on a school farm could be controlled by
A.
handpicking
B.
mowing
C.
ploughing
D.
tilling
Answer: A
8.
The plant structures used for gaseous exchange are the
A.
leaves.
B.
tendrils.
C.
thorns.
D.
roots.
Answer: A
9.
The lion is a carnivore because it eats
A.
flesh.
B.
grass.
C.
fruits.
D.
uncooked food.
Answer: A
Types of feeding by animals
Carnivore: the eating of animals/flesh.
Herbivore: the eating of plants.
Omnivore: the eating of both plants, animals, fungi, bacteria etc.
10.
A mirror is used to direct the sun’s rays onto the classroom wall by
A.
radiation
B.
reflection
C.
conduction
D.
revolution
E.
convection
Answer: B
11.
A solution in which no more solute will dissolve at a particular temperature is said to be
A.
concentrated.
B.
dilute.
C.
saturated.
D.
insoluble.
E.
unsaturated.
Answer: C
Solution is a homogenous mixture of solute and solvent.
The solute is the substance that is being dissolved, while the solvent is the dissolving medium.
A saturated solution can be defined as a solution in which a solvent is not capable of dissolving any more solute at a given temperature.
A dilute solution contains a small amount of solute in a large amount of solvent.
A concentrated solution contains a large amount of solute dissolved in a small amount of solvent.
12.
In which of the following vegetation of Ghana does millet and sorghum grow well?
A.
Costal savannah
B.
Forest zone
C.
Guinea savannah
D.
Transition zone
Answer: C
13.
The embryo of a mammal develops from
A.
eggs fertilized inside the body.
B.
eggs fertilized outside the body.
C.
self fertilized eggs.
D.
only female sex cells.
Answer: A
14.
The dry season in Ghana is mainly from
A.
January to March
B.
April to June
C.
July to September
D.
October to December
Answer: A
The dry season is the period where there is very little or no rainfall. In the southern part of Ghana, the dry season occurs between November to February. The period is much longer in the Northern part which occurs between November to June.
15.
Which of the following has a different physical state from the others under ordinary conditions?
A.
Zinc
B.
Lead
C.
Iron
D.
Mercury
E.
Aluminium
Answer: D
16.
Which of the following diseases is spread by a mosquito?
A.
Blindness
B.
Cholera
C.
Dysentery
D.
Elephantiasis
Answer: D
17.
An example of a natural source of light is
A.
lantern.
B.
moon.
C.
glow worm.
D.
torchlight.
Answer: C
18.
In a first class lever, the load is placed
A.
on the effort
B.
between the effort arm and the pivot
C.
at one end of the load arm
D.
between the pivot and the load arm
E.
on the pivot
Answer: C
19.
The sun is made up of burning
A.
gases
B.
rocks
C.
gold
D.
coal
E.
sulphur
Answer: A
20.
Which of the following types of manure is suitable for a vegetable garden?
A.
Cow dung
B.
Dog faecal waste
C.
Human excreta
D.
Pig dung
Answer: A
21.
The element with the chemical symbol S is
A.
silicon
B.
silver
C.
sodium
D.
Sulphur
Answer: D
22.
Sodium hydroxide is an example of a base because it
A.
has sour taste.
B.
has a pH less than 7.
C.
turns wet blue litmus paper red.
D.
turns wet red litmus paper blue.
Answer: D
23.
Which of the following structures contain cellulose?
A.
Cell wall
B.
Cell membrane
C.
Chloroplast
D.
Mitochondrion
Answer: A
24.
Mosquito pupa breathes through tubes called
A.
trachea.
B.
siphon.
C.
lungs.
D.
gills.
Answer: B
25.
Which of the following living organisms is not a reptile?
A.
Lizard
B.
Tortoise
C.
Frog
D.
Snake
E.
Crocodile
Answer: C
26.
Producers in an ecosystem are plants that
A.
attracts insects.
B.
feed on other plants.
C.
manufacture their own food.
D.
trap insects.
Answer: C
27.
Which of the following diseases can be caused by a housefly?
A.
Dysentery
B.
Elephantiasis
C.
Scabies
D.
Sleeping sickness
Answer: A
28.
All the living and non-living things that surround an organism constitute its
A.
community.
B.
ecosystem.
C.
environment.
D.
habitat.
Answer: C
Environment
A sum total of all the living and non-living elements and their effects that influence human life.
Habitat:
A smaller geographic area where an organism resides is called habitat.
Ecosystem:
A larger geographical area that comprises other species and their interactions is called an ecosystem.
29.
An entrepreneur's decision as to what to produce is a/an
A.
co-ordinating function
B.
organizing function
C.
planning function
D.
supervising function
Answer: C
30.
People who travel in space are called
A.
geologists.
B.
astronauts.
C.
space shuttlers.
D.
astronomist.
Answer: B
Geologist: scientist who study the Earth: its history, nature, materials and processes.
Astronaut: a person who has been trained for travelling in space
31.
Which of the following source(s) of energy is/are renewable?
I. Solar
II. Crude oil
III. Wind
A.
I only
B.
I and II only
C.
I and III only
D.
I, II and III
Answer: C
32.
The best reason why a cooking pan should have a wooden handle is that, wood is a
A.
good conductor of heat
B.
bad conductor of heat
C.
good radiator of heat
D.
bad radiator of heat
E.
good reflector of heat
Answer: B
33.
Which of the following examples is a source of energy?
A.
Electricity
B.
Heat
C.
Light
D.
Wood
Answer: D
34.
Which of the following pairs of structures are present in animal cells?
A.
Mitochondrion and Chloroplast
B.
Nucleus and chloroplast
C.
Vacuole and nucleus
D.
Cell wall and mitochondrion
Answer: C
35.
The following devices work based on the principle of pressure in fluids except
A.
siphons.
B.
flutes.
C.
drinking straws.
D.
water pumps.
Answer: B
36.
The structure which helps a fish to breath under water is the
A.
gill.
B.
air sac.
C.
operculum.
D.
mouth.
Answer: A
37.
The energy possessed by a compressed spring is a
A.
chemical energy.
B.
kinetic energy.
C.
magnetic energy.
D.
potential energy.
Answer: D
38.
A piece of stone could be classified as an opaque material because it
A.
absorbs all the light incident on it.
B.
does not absorb light incident on it.
C.
allows all the light incident on it to pass through it.
D.
does not allow light incident on it to pass through it.
Answer: D
39.
A mixture of engine oil and water could be best separated by
A.
Evaporation
B.
Freezing
C.
Decantation
D.
Heating
E.
Addition of soap
Answer: C
40.
The human forearm is an example of
A.
a first class lever.
B.
a second class lever.
C.
a third class lever.
D.
both first and third class levers.
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)
Explain why a tomato plant is likely to wilt if too much fertilizer is applied to it.
(b)
(i)
Give two differences between electrical insulators and electrical conductors.
(ii)
State two effects of illegal electrical connections in the home.
(c)
Explain each of the following terms as used to describe change of state of matter:
(i)
condensation;
(ii)
freezing.
(d)
(i)
State two diseases of the circulatory system in humans.
(ii)
Mention two ways in which each of the diseases you have stated in (d)(i) can be prevented.
(a)
Why a tomato plant is likely to wilt if too much fertilizer is applied to it
Once two solutions of different concentrations come into contact, water molecules will flow from low to higher concentrated solution. Hence application of fertilizer makes the soil solution of higher concentration so water flow out of the plant by osmosis. The tomato plant plasmolyses/loses water and wilt.
Note
Plasmolysis describes a process involving a plant cell losing water content and therefore contracting and shrinking its cytoplasm and plasma membrane away from the inside of its cell wall. This occurs if the solution surrounding a plant cell is hypertonic or has a high concentration of solutes like salt.
(b)
(i)
Differences between electrical insulators and electrical conductors
| Electrical insulators | Electrical conductors |
| Does not conduct electricity | Conducts electricity |
| Has narrow conduction energy band | Has wide conduction energy band |
| There exists a wide forbidden energy gap between valence and conduction band | Has no forbidden energy gap |
| Electrons firmly bound to nucleus | Electrons loosely bound to nucleus |
| There are no free electrons | Has more free electrons |
(ii)
Effects of illegal electrical connections in the home
1. Overload of power supply
2. Drop in voltage of electricity
3. Leads to frequent power cuts
4. Leads to electrocution/electric shock
5. May cause fire outbreak
6. May damage electrical appliances
7. Leads to loss of revenue to government
(c)
(i)
Condensation is the change from the gas state to the liquid state.
(ii)
Freezing is the change from the liquid state to the solid state.
(d)
| Disease of the circulatory system | Prevention |
| High blood pressure (Hypertension) |
1. Regular exercise
|
| Low blood pressure (Hypotension) |
1. Regular exercise
|
| Piles/Haemorrhoids |
1. Eat a lot of fruits/vegetables
|
| Leukaemia/Blood cancer |
1. Avoid smoking
|
| Varicose vein |
1. Regular exercise
|
| Arteriosclerosis |
1. Regular physical exercise
|
3.
a)
What is a neutralization reaction?
b)
State three physical properties of a soil.
c)
i)
Define the term power.
ii)
If a machine hauls a packing case of mass 50 kg up a building that is 10 m high in 30 s, calculate the power of the machine.
[g = 10 m-2]
d)
State three areas where technology is used for the benefit of humans.
a)
Neutralization reaction is the reaction between an acid and a base to form salt and water only.
b)
Physical properties of soil
1. Texture/feel
2. Structure
3. Consistence/soil strength
4. Bulk density
5. Soil colour
6. Soil temperature
7. Drainage ability
8. Water
9. Air
10. Porosity/Air space
11. Capillary action/Capillarity
12. Organism
13. Permeability
14. Nutrient content
c)
i)
Power is the rate of doing work
OR
Power is the rate at which work is done/energy is used
OR
Power is energy used up/work done per unit time.
OR
Power =
ii)
Power =
Work done = Force x Distance
Force = Mass x Acceleration due to gravity
Mass of the packing case = 50 kg
Acceleration due to gravity = 10 m-2
Force = 50 kg x 10 m-2 = 500 N
Distance = 10 m
Work done = 500 N x 10 m = 5000 J
OR
Work done = potential energy = Mass x Acceleration due to gravity x Height (mgh)
Work done = 50 x 10 x 10 = 5000 J
Time = 30 s
Power = = 166.67 W/166.7 W
d)
Areas where technology is used
1. Used in irrigation system/construction of dams/canals
2. Used in communication industries /Use of computers/satellites/telephones
3. Electronic industry
4. Metallurgical industry/iron and steel industry
5. Food processing/preservation industry
6. Energy sector/generation of electricity/nuclear energy
7. Oil and gas industry
8. Medicine
9. Transportation industry/use of vehicles/trains/aeroplanes, etc.
4.
(a)
(i)
What is indiscriminate sex?
(ii)
Give two reasons why teenagers indulge in indiscriminate sex.
(b)
Name two sources each of
(i)
natural light;
(ii)
artificial light.
(c)
State three ways in which soil texture is important in crop production.
(d)
Write down the systematic name of each of the following chemical compounds:
(i)
FeS;
(ii)
CO;
(iii)
Cu2O;
(iv)
NaOH.
(a)
(i)
Indiscriminate sex is the act of having sexual intercourse with any person or having many/multiple/different sexual partners.
(ii)
Reasons why teenagers indulge in indiscriminate sex
1. Peer pressure
2. Lack of parental guidance
3. Poor financial status of parents/poor homes
4. Lack of sex education
5. Weak morals/exposure to pornographic material
(b)
(i)
Sources of natural light
1. Sun
2. Fireflies
3. Stars
4. Lightening
5. Glow worm
6. Volcano
Note: the moon is not a source of natural light
(ii)
Sources of artificial light
1. Heated filament/electric bulb
2. Firecrackers
3. Torchlight/flashlight
4. Buring charcoal
5. Lantern
6. Satellite
7. Wood fire
8. Lamp
(c)
Ways in which soil texture is important in crop production
1. It helps the farmer to know the type of farming method to use
2. It has an effect on water and air relationship
3. It influences the soil temperature
4. It influences the water holding capacities of the soil
5. Knowledge of soil texture is important in determining soil management practices to adopt
6. It helps the farmer to know the type of crop to plant
(d)
Systematic name of chemical compounds:
(i)
FeS → Iron (II) sulphide
(ii)
CO → Carbon (II) oxide
(iii)
Cu2O → Copper (I) oxide
(iv)
NaOH → Sodium hydroxide
5.
(a)
Copy the table below and write the usual host of each of the parasites given in the spaces provided.
| Parasite | Host |
| Plasmodium | |
| Capsids | |
| Tapeworm | |
| Dodder |
(b)
(i)
Name three classes of food
(ii)
For each of the following food substances, give the major class of food to which it belongs:
Starch, milk, margarine, sugar
(c)
Write the chemical formula for each of the following compounds:
(i)
calcium hydroxide
(ii)
zinc chloride [zinc (II) chloride]
(iii)
sodium nitrate [sodium trioxonitrate (V)]
(iv)
calcium carbonate [calcium trioxocarbonate (IV)]
(v)
potassium sulphate [potassium tetraoxosulphate (VI)]
(d)
(i)
Define the term viscosity
(ii)
Describe an experiment you performed to compare the viscosities of two liquids A and B.
(a)
| Parasite | Host |
| Plasmodium | Man |
| Capsids | Cocoa plant |
| Tapeworm |
1. Cow
|
| Dodder | Milk bush |
(b)
(i)
Classes of food
1. Carbohydrates
2. Proteins
3. Fats and oils
4. Vitamins
5. Mineral salts
6. Water
(ii)
Starch → Carbohydrate
Milk → Protein
Margarine → Fat and oil
Sugar → Carbohydrate
(c)
(i)
calcium hydroxide → Ca(OH)2
(ii)
zinc chloride [zinc (II) chloride] → ZnCl2
(iii)
sodium nitrate [sodium trioxonitrate (V)] → NaNO3
(iv)
calcium carbonate [calcium trioxocarbonate (IV)] → CaCO3
(v)
potassium sulphate [potassium tetraoxosulphate (VI)] → K2SO4
(d)
(i)
Viscosity is defined as the internal force that opposes the movement of liquid molecules.
(ii)
An experiment to compare the viscosities of two liquids A and B
1. Liquid A and B are both poured into two separate identical measuring cylinders to the same level
2. Two identical metal balls are dropped into each of the measuring cylinders and the time taken for each ball to reach the bottom/base of the cylinders of liquids A and B are recorded
3. The liquid in which the metal ball took a longer time to reach the base/bottom of the measuring cylinder is more viscous
6.
(a)
Name two:
(i)
animal products used in preparing protein-rich feed for poultry;
(ii)
plant produces used in preparing carbohydrate-rich feed for poultry.
[4 marks]
(b)
Describe briefly the water cycle.
[6 marks]
(c)
Consider the following mixtures:
Air, vinegar.
Air is essential to life.
Vinegar is a common household substance.
(i)
Name the two major components of each mixture.
(ii)
Which of the components named in (i) acts as the solvent in each of the mixtures?
[6 marks]
(d)
(i)
State two reasons why there is no life on the planet Jupiter.
(ii)
List two other outer planets without life.
[4 marks]
(a)
(i)
Animal products used in preparing protein-rich feed for poultry
1. Feather meal
2. Blood meal
3. Fish meal
4. Milk by-products
5. Meat meal
Any 2 x 1 mark = 2 marks
(ii)
Plant produces used in preparing carbohydrate-rich feed for poultry
1. Sorghum
2. Millet
3. Maize
4. Wheat
5. Rice
6. Wheat bran
Any 2 x 1 mark = 2 marks
(b)
The water cycle
Water evaporates from water bodies into the atmosphere (1 mark) where it condenses into the clouds (1 mark) and falls back into the earth's surface as rain (precipitation) (1 mark).
This then flows into water bodies (1 mark) and taken up by plants (1 mark) which transpire to give water vapour (1 mark).
6 marks
(c)
(i)
Vinegar → ethanoic acid (1 mark) and water (1 mark)
2 marks
Air → nitrogen (1 mark) and oxygen (1 mark)
2 marks
(ii)
Vinegar → water is the solvent (1 mark)
Air → nitrogen is the solvent (1 mark)
2 marks
(d)
(i)
Reasons why there is no life on the planet Jupiter
1. Extreme/cold temperatures
2. No oxygen
3. No water
4. Far away from the sun
5. Absence of solid surface
6. Toxic radiations/gases
7. Strong magnetic field
Any 2 x 1 mark = 2 marks
(ii)
Other outer planets without life
1. Saturn
2. Uranus
3. Neptune
Any 2 x 1 mark = 2 marks