KUULCHAT
SCIENCE MOCK

OBJECTIVE TEST

1.

The scent of a perfume sprayed at one corner of a room fills the entire room through

A.

conduction.

B.

diffusion.

C.

osmosis.

D.

radiation.

Answer: B

Diffusion is the net passive movement of molecules or particles from regions of higher to regions of lower concentration.

At the corner of the room where the perfume was sprayed, the concentration was higher and the molecules moved from that region to the region where the concentration was lower.

2.

The parasite that is found on dogs is

A.

capsid.

B.

guinea worm.

C.

plasmodium.

D.

tapeworm.

E.

Tick.

Answer: E

3.

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 Volume

Mass = 80.0 g

Volume = 20.0 cm3

Density = 80 g 20 cm3

Density = 4.0 g cm-3

4.

Heat from the sun by

I. Conduction
II. Convention
III. Radiation

A.

I only

B.

II only

C.

III only

D.

I, II and III

Answer: C

Radiation: is the transfer of heat energy through space by electromagnetic radiation.

Conduction: is the transfer of heat energy from one substance to another or within a substance

Convection: is the transfer of heat energy in a fluid.

5.

Which of the following organisms is an ecto-parasite of animals?

A.

Fleas

B.

Tapeworm

C.

Liver fluke

D.

Roundworm

Answer: A

Ectoparasite: parasites that live on the surfaces of host organisms or in the skin and do not invade the inner body

Examples of ectoparasites

Fleas, head lice and bed bugs

Endoparasite

Endoparasites are parasites which live inside a host and generally inhabit areas such as the gut, lungs, heart and blood vessels.

Examples of endoparasites

Tapeworm, fluke and roundworm

6.

A disease-causing organism that is most difficult to control in crop production is

A.

bacterium

B.

fungus

C.

nematode

D.

virus

Answer: A

7.

When a substance is made up of the same kind of atoms it is called

A.

a mixture

B.

a compound

C.

an element

D.

a solution

E.
a solvent

Answer: C

8.

The ovary, style and stigma are collectively known as the

A.

stamen.

B.

pistil.

C.

fruit.

D.

stem.

Answer: B

9.

The ovules in a flower develop to form the

A.

fruit.

B.

leaf.

C.

seed.

D.

stem.

Answer: C

10.

The nearest planet to the sun in the solar system is

A.

Earth

B.

Mars

C.

Mercury

D.

Venus

Answer: C

Mercury is the smallest planet in our solar system and nearest to the Sun, Mercury is only slightly larger than Earth's Moon.

11.

When testing for proteins in a food substance using Fehling's solution, the expected colour change is

A.

blue.

B.

purple.

C.

blue-black.

D.

brick-red.

Answer: D

12.

Soil aeration could be improved through

A.

mulching

B.

irrigation

C.

soil drainage

D.

fertilizer application

Answer: A

13.

The chemical formula of iron (II) sulphide is

A.

FeS2.

B.

Fe2S.

C.

FeS.

D.

Fe2S3.

Answer: C

14.

A force meter measures

A.

mass.

B.

temperature.

C.

weight.

D.

work.

Answer: C

Force meter measures force/weight of an object

15.

Which of the following substances is a compound?

A.

Hydrogen

B.

Nitrogen

C.

Oxygen

D.

Water

Answer: D

16.

The gaps left between railway lines is to allow for

A.

expansion.

B.

cooling.

C.

maintenance.

D.

easy stopping.

E.

gear changing.

Answer: A

17.

The female part of a flower is called the

A.

filament.

B.

petal.

C.

pollen grain.

D.

sepal.

E.

Style.

Answer: E

18.

Which of the following is an excretory organ?

A.

Anus

B.

Eye

C.

Heart

D.

Skin

E.
Pancreas

Answer: D

19.

The sun, the heavenly bodies and the planets form the

A.

atmosphere

B.

galaxy

C.

milky way

D.

solar system

E.

universe

Answer: D

20.

Spectacles fitted with concave lenses are worn by people suffering from

A.

loss of accommodation.

B.

total blindness.

C.

long sightedness.

D.

short sightedness.

Answer: D

Concave Lenses are for the short sightedness and convex for the long sightedness.

21.

In man, the conversion of poisonous substances into harmless forms takes place in the

A.

bladder.

B.

duodenum.

C.

kidney.

D.

liver.

Answer: D

The liver is the largest solid organ in the body. It removes toxins from the body’s blood supply, maintains healthy blood sugar levels, regulates blood clotting, and performs hundreds of other vital functions. It is located beneath the rib cage in the right upper abdomen.

Key Facts
1. The liver filters all of the blood in the body and breaks down poisonous substances, such as alcohol and drugs.
2. The liver also produces bile, a fluid that helps digest fats and carry away waste.

22.

Producers in an ecosystem are plants that

A.

feed on other plants.

B.

feed on dead materials.

C.

manufacture their own food.

D.

attract insects.

Answer: C

23.

Which of the following simple machine is a second class lever?

A.

Bottle top opener

B.

Claw hammer

C.

Fishing rod

D.

Pair of pliers

Answer: A

24.

When light travels from glass to air, its speed is

A.

increased.

B.

reduced.

C.

halved.

D.

unchanged.

Answer: A

25.

One disease that affects the nervous system of humans is

A.

filariasis.

B.

measles.

C.

poliomyelitis.

D.

typhoid

Answer: C

Poliomyelitis (Polio) is a highly infectious disease caused by a virus. It invades the nervous system and can cause total paralysis in a matter of hours.

26.

The volume of water in a container rises when a piece of stone is put into the container. The change in the volume of water is equal to the
A.
mass of the container
B.
mass of the stone
C.
density of the stone
D.
density of the water
E.
volume of the stone

Answer: E

27.

A student who complained of stomach upset was given first aid with Mg(OH)2 boldly written on it. What could be the common name of the first aid the student was given?

A.

Milk of aluminium

B.

Milk of magnesia

C.

Trisilicate

D.

Martins liver salt

Answer: B

28.

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.

29.

Which of the following is not an example of matter?
A.
Hydrogen
B.
Oxygen
C.
Light
D.
Water
E.
Charcoal

Answer: C

30.

All veins in the body carry blood that does not contain oxygen with the exception of the veins from the

A.

heart.

B.

kidneys.

C.

lungs.

D.

liver.

Answer: C

31.

Which of the following structures takes part in human digestion?

A.

Caecum

B.

Kidney

C.

Larynx

D.

Pancreas

Answer: A

32.

A stone displaced 20 cm3 of water when immersed in the water. If the mass of the stone is 40 g. find the density of the stone

A.

60 g cm-3

B.

40 g cm-3

C.

2 g cm-3

D.

0.5 g cm-3

Answer: C

Density

Density = Mass Volume

Mass = 40 g
Volume = 20 cm3

Density = 40 g 20  cm3

Density = 2 g cm-3

33.

Which of the following factors contribute to early parenthood?

I. Illiteracy

II. Poverty

III. Peer pressure

IV. Lack of parental care

A.

I and II only

B.

II and III only

C.

III and IV only

D.

I, II, III and IV

Answer: D

34.

Which of the following sources of energy is/are renewable?
I. Wind
II. Coal
III. Crude oil

A.

I only

B.

I and II only

C.

II and III only

D.

I,II and III

Answer: A

Renewable Energy

Renewable energy is defined as energy that is produced by natural resources—such as sunlight, wind, rain, waves, tides, and geothermal heat—that are naturally replenished within a time span of a few years.

A renewable energy source means energy that is sustainable - something that can't run out, or is endless, like the sun.

Sources of Renewable Energy

1. Solar energy
2. Wind energy
3. Hydro energy
4. Tidal energy
5. Geothermal energy
6. Biomass energy

35.

Which of the following is true about loamy soil?

I. Is formed from a mixture of sand and clay

II. It is good for plant cultivation

III. Its water retention is poor

A.

I only

B.

I and II only

C.

I and III only

D.

II and III only

E.

I, II and III

Answer: B

36.

Which of the following explains why no work is done when a push is made against a firm wall?

A.

The force acts in the opposite direction

B.

The wall does not move

C.

The force is in the same direction

D.

The material of the wall is strong

E.

The force is in horizontal direction

Answer: B

Work done = Force x Distance

When there is no movement, distance = 0

Work done = Force x 0 = 0 J

37.

The hard outer surface of a tooth is called

A.

root.

B.

dentine.

C.

cement.

D.

enamel.

Answer: D

Root

The root is the part of the tooth that extends into the bone and holds the tooth in place. It makes up approximately two-thirds of the tooth.

Enamel

The enamel is the outermost layer of a tooth. As the hardest tissue in your body, it helps to protect teeth from bacteria. It also provides strength so your teeth can withstand pressure from chewing.

Dentin

Dentin is a layer of mineralized tissue just below the enamel. It extends from the crown down through the neck and root. It protects teeth from heat and cold.

38.

Which of the following chemical equations is balanced?

A.

K + O2→K2O

B.

Mg + O2→MgO

C.

Na + Cl2→NaCl

D.

H2 + Cl2→2HCl

Answer: D

39.

Which of the following statements best explains why gases are more compressible than solids?

A.

Particles in gases are smaller than in solids.

B.

Gases have fixed volume but solids do not.

C.

Particles in solids have definite shape but gases have no definite shape.

D.

Particles in gases have wider intermolecular spaces as compared to solids.

Answer: D

40.

Ringworm is a disease which attacks the

A.

skin.

B.

lungs.

C.

liver.

D.

kidneys.

Answer: A

THEORY QUESTIONS

1.

(a)

The diagram below is used to demonstrate an activity in the laboratory.

Study it carefully and use it to answer the questions that follow:

(i)

What does the diagram represent?

(ii)

Identify the components labelled, D, E, K and P in the diagram.

(iii)

State one function each of the parts labelled, D, E, K and P.

(iv)

Mention the energy transformation that occurs in E in the diagram when K is closed.

(b)

In an experiment, red and blue litmus papers were dipped separately into three test tubes containing one of the test substances listed in the table below.

Test substances Observation Conclusion
Red litmus paper Blue litmus paper
Lemon juice
Calcium hydroxide
Dilute hydrochloric acid

(i)

Copy and complete the table by making the necessary observation and conclusion for each substance.

(ii)

Name two of the test substances that would react with each other to produce salt and water.

(iii)

Write down a balanced chemical equation for the reaction in (ii) above.

(c)

The diagram below is an illustration of the human digestive system.

Study it carefully and use it to answer the questions that follow:

(i)

Name the parts labelled I, II, III and IV.

(ii)

State one function of each of the parts labelled V and VI.

(iii)

Name the part where the digestion of protein starts.

(iv)

Identify the part where

(α)

absorption of end-products of digestion takes place.

(β)

re-absorption of water takes place.

(γ)

egestion takes place.

(d)

The diagram below is an illustration of a simple farm tool.

Study it carefully and use it to answer the questions that follow:

(i)

Identify the tool.

(ii)

State three uses of the tool.

(iii)

Mention three ways of maintaining the tool.

(a)

(i)

Electrical circuit diagram

(ii)

D → Copper wire/conducting wire/connecting wire E → Cell K → Switch/Key P → Resistor/Load

(iii)

Functions of D (Copper wire)

1. To conduct electric current/electricity
2. To connect components of an electrical circuit

Functions of E (Cell)

1. To produce electricity
2. Source of electric current/electric charge
3. Converts chemical energy into electrical energy

Function of K (Switch/Key)

To allow electric current to flow through the circuit depending on whether it is closed or opened

Functions of P (Resistor/Load)

1. To convert electrical energy to other forms of energy
2. To opposre the flow of current through the circuit

(iv)

Energy transformation in electric circuit

Chemical energy is converted into electrical energy.

OR

Chemical energy → Electrical energy

(b)

(i)

Test substances Observation Conclusion
Red litmus paper Blue litmus paper
Lemon juice No change Changed to red Acidic/acid present/contains acid
Calcium hydroxide Changed to blue No change Basic/base present/contains base
Dilute hydrochloric acid No change Changed to red Acidic/acid present/contains acid

(ii)

Calcium hydroxide and dilute hydrochloric acid

(iii)

Ca(OH)2 + 2HCl → CaCl2 + 2H2O

(c)

(i)

I → Tongue/salivary gland
II → Oesophagus/gullet
III → Stomach
IV → Liver

(ii)

V → Stores bile
VI → Produces enzymes/pancreatic juice

(iii)

Digestion of protein starts at part III (stomach)

(iv)

(α)

Absorption of end-products of digestion takes place in the part VII (small intestine/ileum)

(β)

Re-absorption of water takes place in the part VIII (large intestine/colon)

(γ)

Egestion takes place in the part X (anus)

(d)

(i)

A pair of secateurs

(ii)

Uses of secateurs

1. For cutting
2. For trimming
3. For pruning

(iii)

Ways of maintaining the secateurs

1. Greasing/oiling/lubricating metal parts to prevent rusting
2. Cleaning/washing and drying after use
3. Sharpening cutting edges when blunt
4. Repairing/mending broken parts
5. The tool/secateurs should be used for the intended job
6. Tightening loose bolts and nuts
7. Storing tool in cool dry places or tool box

2.

a)

State three ways in which mulching restores soil resources.

b)

i)

Name the two elements that combines to form ammonia gas.

ii)

Write a balanced chemical equation for the formation of ammonia from the elements named in (i).

c)

The following information is on the feeding habits of some organisms:

i)

man feeds on grasscutter;

ii)

toad feeds on grasshopper;

iii)

snake feeds on toad;

iv)

goat feeds on grass;

v)

man feeds on hawk;

vi)

grasshopper feeds on grass;

vii)

hawk feeds on snake;

viii)

grasscutter feeds on grass.

Use all the information given above to construct a food web.

d)

i)

What is a galaxy?

ii)

State the relationship between stars and galaxies.

iii)

Explain briefly the term milky way.

a)

Ways in which mulching helps to restores soil resources

1. It checks growth of weeds (which will otherwise take water out of the soil)
2. It improves soil structure/texture (which in turn improve the soil water holding capacity/soil drainage)
3. It reduces/checks soil erosion
4. It reduces water loss from the soil by evaporation/increases water-holding capacity of soil
5. It adds nutrients/organic matter to the soil
6. It helps maintain soil temperature
7. Conserves soil nutrients
8. Improves activity of soil organisms

b)

i)

The two elements that combines to form ammonia gas

1. Nitrogen
2. Hydrogen

ii)

Balanced chemical equation for the formation of ammonia

N2 + 3H2 → 2NH3

c)

d)

i)

Galaxy is a group of stars.

OR

Galaxy is a system of stars,gases,dust/dark matter held together in the heavens/space.

OR

Galaxy is a collection of billions of stars that show a common gravitational link.

ii)

Relationship between stars and galaxies

Galaxies are held together by gravitational attraction much like a solar system while stars in the solar systems combine to form galaxies

OR

Stars makes up the galaxies

OR

Galaxies are made up of several billions of Stars

iii)

Milky way is the galaxy that contains the solar system and the earth.

OR

Milky way is a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.

3.

a)

i)

What is an acid?

ii)

Give two difference between an acid and a base, in terms of taste and feel.

b)

i)

Define pressure.

ii)

A force of 200N is exerted on an area of 50m2. Calculate the pressure exerted by the force.

c)

Explain the following terms as associated with living organisms.

i)

unicellullar;

ii)

multicellullar.

d)

Give two reasons why soil air is important.

a)

i)

An acid is a proton donor

OR

An acid is a substance/compound that produces excess hydrogen ion (H+) in water.

An acid is a substance that contains replaceable hydrogen.

ii)

Differences between an acide and a base

Acid Base
Taste Sour Bitter
Feel Non slippery or stinging Slippery or soapy
Litmus paper Turns blue litmus paper red Turns red litmus paper blue
pH below 7 Above 7
In water Gives Hydrogen ion (H+) Gives Hydroxyl (Hydroxide) ion (OH-)
Proton Donates proton when dissolved in water Accepts proton when dissolved in water

b)

i)

Pressure is force per unit area or the force acting (normally) per unit area

OR

Pressure = (Normal) Force Area

ii)

Pressure

Pressure = Force Area

Force = 200 N

Area = 50 m2

Pressure = 200 50

Pressure = 4 Nm-2 or 4 Pa

c)

i)

Unicellular is a living organism that consists of only once cell.

ii)

Multicellular, living organisms that consist of many cells.

d)

Reasons why soil air is important

1. It enhances absorption of mineral salts or nutrients by plant roots
2. It enhances the absorption of water by plant roots
3. It makes oxygen available for seed germination
4. Presence of aeration prevents the formation of toxic/acidic substances in the soil by micro organisms
5. Plant roots use soil air for respiration/metabolism or growth
6. Soil micro organisms use soil air for respiration
7. Air is required for the decomposition of organic matter
8. Aeration is required to prevent development of plant diseases

4.

(a)

(i)

What is meant by a satellite?

(ii)

State one difference between a natural and an artificial satellite.

(iii)

State two uses of artificial satellite.

(b)

Give two differences between the mass and weight of a body.

(c)

Write the chemical formulae for the following substances.

(i)

Calcium oxide;

(ii)

Water;

(iii)

Copper sulphate.

(d)

What will be the effect on the colour of blue litmus paper when it is dropped in each of the following solutions?

(i)

Sodium hydroxide solution;

(ii)

Dilute hydrochloric acid;

(iii)

Lime juice;

(iv)

Water.

(e)

(i)

Define breathing

(ii)

Arrange the following parts of the human being respiratory system in order in which air from the atmosphere passes through them during breathing:

Trachea, nostrils, lungs and bronchus.

(iii)

Describe briefly what happens to a piece of bread when it reaches the duodenum of a human being.

(a)

(i)

A satellite is an object which moves around a planet in space

(ii)

Differences between a natural and an artificial satellite

Natural satellite Artificial satellite
Has no engine Uses rockets/engines
Not projected by man Launched into space by man
It is permanent It is temporary
Created by God before our forefathers Man made
Its orbit is fixed Its orbit can be varied

(iii)

Uses of artificial satellites

1. For exploring the planets/moons
2. For scientific research/experimental research/internet
3. To study the universe
4. For communications/broadcasting/telephone call
5. For weather forecast/collecting information on the weather
6. Map making
7. Spying
8. For navigation/satellite for navigation
9. Military purposes

(b)

Differences between the mass and weight of a body

Mass Weight
Mass is measured in kilogrammes (Kg) Weight is measured in newtons (N)
Mass is not a force Weight is a force
Mass is a scalar quantity Weight is a vector quantity
Mass is constant everywhere Weight varies from place to place

(c)

(i)

Calcium oxide → CaO

(ii)

Water → H2O

(iii)

Copper sulphate → CuSO4

(d)

# Solution + Blue litmus paper Observation
i) Sodium hydroxide solution No colour change on litmus paper/colour of litmus paper remains the same because sodium hydroxide is a base
ii) Dilute hydrochloric acid The colour of the litmus paper changes from blue to red because hydrochloric acid is an acid
iii) Lime juice The colour of the litmus paper changes from blue to red because lime juice is an acid
iv) Water No colour change on litmus paper/colour of litmus paper remains the same because water is neutral

(e)

(i)

Breathing is the process by which animals take in oxygen and give out carbon dioxide through their lungs/respiratory organs.

(ii)

The human being respiratory system in order in which air from the atmosphere passes through them during breathing

Nostrils → Trachea → Bronchus → Lungs

(iii)

Digestion of a piece of bread when it reaches the duodenum of a human being

1. When the bread gets into the duodenum, the pancreas produces a liquid called pancreatic juice
2. The pancreatic juice contains an enzyme called amylase which breaks down the bread (carbohydrate) into complex sugar (maltose)

5.

(a)

(i)

What do the symbols L, N and E represent in an electric plug?

(ii)

What is the function of the fuse box in household electrical wiring?

(b)

Mention four classes of insect pest based on their feeding habits.

(c)

Classify the first four elements of the periodic table as metals and non- metals.

(d)

Name the three types of blood vessels in humans.

(a)

(i)

L → Live
N → Neutral
E → Earth

(ii)

Function of the fuse box in household electrical wiring

1. It contains fuses/thin wires which melt and cut off current when the current passing through is too large

2. It protects the appliances/electrical circuit

(b)

Classes of insect pest based on their feeding habits

1. Biting/tearing insects
2. Boring insects
3. Preying insects
4. Piercing insects
5. Chewing/rasping insects
6. Sucking insects

(c)

Classification of the first four elements of the periodic table as metals and non- metals

Metals Non-metals
Lithium Hydrogen
Beryllium Helium

(d)

The three types of blood vessels in humans

1. Artery
2. Vein
3. Capillary

6.

(a)

(i)

Name the gas which is used in both rusting and burning

(ii)

State two ways in which rusting can be prevented in everyday life.

(b)

Classify each of the following items as element, compound, mixture or colloid:

(i)

Sodium chloride

(ii)

Sugar solution

(iii)

Fog

(iv)

Hydrogen

(v)

Sulphur

(c)

(i)

Use any three of the following to form a food chain:

Man, bird, green grass, goat, grasshopper

(ii)

Name two diseases that can be controlled by immunization.

(d)

(i)

A boy throws a stone vertically up into the air. What are the energy changes that take place as the stone falls to the ground?

(ii)

Give two appliances which use electromagnets in their operation

(iii)

List two ways in which a magnet can lose its magnetism.

(a)

(i)

The gas which is used in both rusting and burning is oxygen

(ii)

Ways in which rusting can be prevented in everyday life

1. Painting
2. Galvanizing (electroplating)
3. Greasing
4. Oiling
5. Alloying

(b)

Element Compound Mixture Colloid

Sulphur
Hydrogen

Sodium chloride

Sugar solution

Fog

(c)

(i)

Green grass → grasshopper → bird

OR

Green grass → goat → man

(ii)

Diseases that can be controlled by immunization

1. Tuberculosis
2. Measles
3. Poliomyelitis
4. Whooping cough
5. Diphtheria
6. Tetanus
7. Yellow fever
8. Cholera

(d)

(i)

Potential energy → Kinetic energy → Sound energy → Heat energy

(ii)

Appliances which use electromagnets in their operation

1. Telephone receivers
2. Loudspeakers
3. Electric bells
4. Burglar alarms
5. Microphones

(iii)

Ways in which a magnet can lose its magnetism

1. Heating the magnet in fire
2. Striking the magnet continuously with a hammer
3. Placing it in a solenoid through which an alternating current flows