KUULCHAT
SCIENCE MOCK

OBJECTIVE TEST

1.

The second stage in the life cycle of a mosquito is the

A.

egg.

B.

imago.

C.

larva.

D.

pupa.

Answer: C

2.

Which of the following diseases can be classified as a viral disease?

A.

Candidiasis

B.

H1N1

C.

Meningitis

D.

Ringworm

Answer: B

H1N1, also known as swine flu, is a respiratory disease caused by a specific type of influenza A virus. While it was initially associated with pigs, it can now be transmitted from person to person. The 2009 pandemic was caused by a novel H1N1 strain, but it is now considered a regular seasonal flu virus.

3.

Which of the following statements about the base of a transistor are correct? The base is

I. made very thin
II. made very wide
III. responsible for activating the transistor
IV. made of n-type semiconductor

A.

I and III only

B.

II and IV only

C.

I, III and IV only

D.

II, III and IV only

Answer: A

4.

Germs that infect the respiratory system are frequently spread through

I. mucus.

II. air pollution.

III. coughs.

A.

I only

B.

II only

C.

II and III only

D.

I, II and III

Answer: D

5.

All the following add nitrates to the soil except

A.

Okro

B.

Broad beans

C.

French beans

D.

Groundnuts

E.
Pigeon pea

Answer: A

6.

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.

7.

Power is defined as the

A.

ability to do work.

B.

force to move an object.

C.

rate of doing work.

D.

ability to replace energy used.

Answer: C

Power = Work done Time

8.

Which of the following practices encourages soil erosion?

A.

Planting cover crops

B.

Mulching

C.

Contour ridging

D.

Crop rotation

E.
Ploughing along the slope

Answer: E

9.

A force meter measures

A.

mass.

B.

temperature.

C.

weight.

D.

work.

Answer: C

Force meter measures force/weight of an object

10.

Which of these is not a sense organ?

A.

Eye

B.

Ear

C.

Nose

D.

Skin

E.

Heart

Answer: E

11.

The figure below shows a simple electric circuit.

Use it to answer the question below.

The switch is represented by

A.

IV

B.

III

C.

II

D.

I

Answer: C

COMPONENTS OF CIRCUIT

12.

The organelle which occupies the largest portion of a plant cell is the

A.

chloroplast.

B.

mitochondrion.

C.

nucleus.

D.

vacuole.

Answer: D

13.

Which of the following activities illustrates distillation?

A.

Preparation of soup

B.

Preparation of akpeteshie

C.

Tapping of palm wine

D.

Preparation of starch

E.
Freezing of water

Answer: B

14.

The diagram below represents a circuit symbol in an electronic device. Study it carefully and use it to answer the question below.

The part of the diagram labelled I has

A.

more electrons than holes.

B.

no holes.

C.

more holes than electrons.

D.

the same number of holes as electrons.

Answer: C

15.

Weeds on a school farm could be controlled by

A.

handpicking

B.

mowing

C.

ploughing

D.

tilling

Answer: A

16.

The organ in the human body which is responsible for the removal of urea is the

A.

heart.

B.

kidney.

C.

lung.

D.

liver.

E.

bladder.

Answer: B

17.

When a ray of light travels from a dense medium into a denser medium, it

A.

bends towards the normal.

B.

bends away from the normal.

C.

is parallel to the incident ray.

D.

is perpendicular to the incident ray.

Answer: A

18.

Which of the following modes of heat transfer is the thermos flask designed to minimize?

I. Conduction
II. Convection
III. Radiation

A.

I and II only

B.

I and III only

C.

II and III only

D.

I, II and III

Answer: D

19.

Liquids suitable for use in thermometers must not:

A.

wet glass

B.

have a low boiling point

C.

have a high melting point

D.

have a high density

E.
expand

Answer: A

20.

The major charge carriers in p-type semiconductors are

A.

anions

B.

electrons

C.

holes

D.

neutral

Answer: C

Holes and electrons are the two types of charge carriers responsible for current in semiconductor materials. A hole is the absence of an electron in a particular place in an atom. In P-type semiconductor material, holes are the majority carriers and electrons are the minority carriers while in N-type semiconductor material, electrons are the majority carriers and holes are the minority carriers

21.

The process by which waste substances are removed from the body is called

A.

egestion.

B.

excretion.

C.

perspiration.

D.

respiration.

Answer: B

22.

The darkest part of a shadow formed when a large source of light is used is the

A.

Partial eclipse

B.

Lunar eclipse

C.

night

D.

penumbra

E.

umbra

Answer: E

23.

The reason why alum is added to water during treatment is to

A.

kill germs.

B.

give taste to water.

C.

make water colourless.

D.

make suspended particles to settle.

Answer: D

24.

The practice of growing cowpea and maize on a piece of land at the same time is known as

A.

mixed farming.

B.

mixed cropping.

C.

land rotation.

D.

crop rotation.

Answer: B

Mixed Cropping

When two or more crops are grown on the same land simultaneously (at the same time), it is known as mixed cropping

Mixed Farming

Growing crops as well as livestock, animal husbandry,etc all on same farm or land.

Crop Rotation

The practice of planting different crops across a sequence of growing seasons on the same plot of land to improve soil health, optimize nutrients in the soil, and combat pest and weed pressure.

25.

Energy is the

A.

force to move an object.

B.

weight of the body.

C.

ability to do work.

D.

power to carry an object.

Answer: C

26.

A torch light bulb lights up when connected to a dry cell. What type of energy is obtained from the cell?

A.

Chemical energy

B.

Light energy

C.

Potential energy

D.

Electrical energy

E.
Heat energy

Answer: D

27.

Which of the following conditions is not required for a current to flow through an electric circuit?

A.

The circuit should be closed

B.

A battery must be present

C.

There must be connecting wires

D.

A bulb must be connected in the circuit

Answer: D

28.

Which of the following factors are used to describe a fertile soil?

I. Amount of organic matter

II. Color

III. Texture

A.

I and II only

B.

I only and III only

C.

II and III only

D.

I,II and III only

Answer: A

Soil fertility refers to the ability of soil to sustain agricultural plant growth, i.e. to provide plant habitat and result in sustained and consistent yields of high quality. Soil factors: Soil moisture, color, soil air, soil temperature, soil mineral matter, inorganic and organic components, microorganisms, soil reaction

29.

The food substance found in yam is

A.

carbohydrate.

B.

oil.

C.

protein.

D.

vitamin.

Answer: A

30.

Which of the following factors has the greatest influence on vegetable crop production?

A.

Availability of labour

B.

Nearness to market

C.

Source of water

D.

Presence of pest

Answer: C

31.

The relative proportion of sand, silt and clay in a given sample of soil is soil

A.

profile.

B.

porosity.

C.

structure.

D.

texture.

Answer: D

32.

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

33.

Which of the following substances can exist in all the three states of matter at 0°C?

A.

Petrol

B.

Palm oil

C.

Milk

D.

Alcohol

E.
Water

Answer: E

34.

Regular brushing of teeth is primarily done in order to

A.

keep the mouth fresh

B.

clear away food particles from the teeth

C.

remove bad smell in the mouth

D.

kill bacteria in the mouth

E.
control the flow of saliva

Answer: B

35.

Which of the following parasites is a plant?

A.

Bilharzia

B.

Dodder

C.

Lice

D.

Tapeworm

Answer: B

DODDER (Plant Parasite)

36.

According to the principle of conservation of energy, ‘energy can

A.

be created and destroyed

B.

be created but not destroyed

C.

be destroyed but not created

D.

be reduced but not increased

E.
neither be created nor destroyed

Answer: E

37.

When a thermometer is put in hot water, the mercury level rises because the mercury increases in

A.

density.

B.

mass.

C.

volume.

D.

weight.

Answer: C

The mercury expands and the volume increases.

38.

Which of these structures regulate the amount of light that enters the eye?

A.

Retina

B.

Cornea

C.

Pupil

D.

Choroid

E.
Lens

Answer: C

39.

When a stick is dipped into a pool of water, it appears to

A.

be longer than its length.

B.

ben away from the surface.

C.

be seen straight in the water.

D.

bend towards the surface.

Answer: D

40.

Crystals of sugar were obtained when a hot solution of sugar was cooled to room temperature. What conclusion can be drawn from this observation?

A.

Sugar does not dissolve in cold water

B.

Sugar does not dissolve in hot water

C.

Sugar dissolves more in hot water than in cold water

D.

Sugar dissolves less in hot water than in cold water

E.

Sugar dissolves more in cold water than in hot water

Answer: C

THEORY QUESTIONS

1.

a)

What is vegetable crop?

b)

i)

What is air pollution?

ii)

State two humans activities that lead to air pollution.

c)

i)

List three modes of heat transfer.

ii)

Name the type of medium in which each mode of heat transfer you have listed in (i) takes place.

d)

Give three reasons why proteins are important in the diet of mammals.

a)

Vegetable crop is any (herbaceous) plant whose parts (seeds/fruits/roots/tubers/bulbs/stems/leaves/flowers) are used as foods.

b)

i)

Air pollution is the release of toxic/poisonous substances into the atmosphere.

ii)

Humans activities that lead to air pollution

1. Discharge of gases from factories
2. Smoke from exhaust engines and other machines
3. Smoke from domestic fires
4. Discharge of chloroflourocarbons from aerosol sprays and some refrigerators
5. Bush burning
6. Dust from open cast mining
7. Dust from sand winning and stone quarrying
8. Dust from construction
9. Smoke from cigarette/smoking

c)

i)

Modes of heat transfer

1. Conduction
2. Convection
3. Radiation

ii)

Medium for mode of heat transfer

1. Conduction → Solid
2. Convection → Liquid/gas/fluid
3. Radiation → vacuum/no material medium

d)

Importance of protein

1. Replacement/repair of worn out tissues/cells
2. Replacement of dead tissues/cells
3. Growth
4. Makes hormones
5. Makes enzymes
6. Provides energy

2.

(a)

Copy and complete the table below:

Disease Causative Agent Prevention/Control
Cholera Vibrio spp. Eating hot food
i) ..................... Plasmodium ii) ......................
iii) .................... Louse Personal hygiene
Ringworm iv) ........................ v) ..................................

(b)

Name two different particles of matter which carry

(i)

a negative charge;

(ii)

a positive charge;

(iii)

no charge.

(c)

A simple machine moves a load of 20 N through a distance of 2 m. If it uses an effort of 25 N which moves through a distance of 4 m, calculate the

(i)

work input;

(ii)

work output;

(iii)

efficiency of the machine.

(a)

Disease Causative Agent Prevention/Control
Cholera Vibrio spp. Eating hot food
i) Malaria Plasmodium ii)Removing stagnant water and bushes around houses

OR

Use of mosquito net

OR

Use of mosquito repellents

OR

Use of preventive drug

OR

Vaccination
iii) Anaemia/Typhus Louse Personal hygiene
Ringworm iv) Fungus/Tinea v) Regular bathing

OR

Personal hygiene

(b)

(i)

Negative charged particles

1. Anion/negative ion
2. Electron
3. Beta particle

(ii)

Positive charged particles

1. Cation/positive ion
2. Proton
3. Alpha particle

(iii)

Particles with no charge

1. Atom
2. Neutron
3. Molecule

(c)

(i)

Work input = Effort x Effort distance

Work input = 25 N x 4 m = 100 J

(ii)

Work output = Load x Load distance

Work output = 20 N x 2 m = 40 J

(iii)

Efficiency of the machine = Work out Work input x 100%

Efficiency of the machine = 40 J 100 J x 100% = 40%

OR

Efficiency of the machine = Mechanical Advantage (M.A) Velocity Ratio (V.R) x 100%

Mechanical Advantage = Load Effort = 20 25 = 4 5

Velocity Ratio = Effort Distance Load Distance = 4 2

Efficiency of the machine = 4 5 4 2 x 100%

Efficiency of the machine = 4 5 ÷ 4 2 x 100%

Reciprocate the fraction after the ÷ and change the ÷ to multiplication (x)

Note: reciprocate means the numerator becomes the denominator and the denominator becomes the numerator.

Efficiency of the machine = 4 5 x 2 4 x 100%

Efficiency of the machine = 4 x 2 5 x 4 x 100%

Note: the 4s cancel each other.

Efficiency of the machine = 2 5 x 100%

Note: 5 divides itself 1 time and 100, 20 times.

Efficiency of the machine = 2 x 20% = 40%

3.

a)

i)

State two uses of water in agriculture.

ii)

Name two crops that are deep rooted.

b)

i)

Explain the term circulatory system in humans.

ii)

Classify each of the following processes as diffusion or osmosis:

α)

absorption of water by the roots of a plant

β)

movement of digested food from the small intestine into the blood stream

c)

i)

What is mass?

ii)

A box of equal size 3cm has a density of 2.0gcm-3.What is its mass?

d)

Give the state of each of the following substances:

i)

ash;

ii)

carbon dioxide.

a)

i)

Uses of water in agriculture

1. Cleaning
2. Irrigation
3. Fishing/Fish farming
4. For fertilizer application
5. For pest control
6. Drinking/consumption by farm animals

ii)

Deep rooted crops

1. Tomato
2. Carrots
3. Yam
4. Cassava
5. Watermelon
6. Cocoyam
7. Pumpkin

b)

i)

Circulatory system is a collection of tissues and organs which transports materials or food or water or oxygen throughout the (whole) body

ii)

α)

Absorption of water by the roots of a plant

Osmosis

β)

Movement of digested food from the small intestine into the blood stream

Diffusion

c)

i)

Mass is the amount of substance (matter) in a body or particle

Is a measure of how much matter is in an object

ii)

Density = Mass / Volume

Mass = Density x Volume

Density = 2.0 g cm-3, Length = 3 cm

Length of a cuboid (Equal size) = Length x Length x Length

Volume of the box = 3 cm x 3 cm x 3 cm = 27.0 cm3

Mass = 2.0 g cm-3 x 27.0 cm3 = 54.0 g

d)

i)

ash → solid

ii)

carbon dioxide → gas

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)

Define

(i)

self-pollination

(ii)

cross-pollination

(b)

State two ways in which cross-pollinated plants are better than self-pollinated plants.

(c)

Sodium chloride is prepared by the reaction between dilute hydrochloric acid and sodium hydroxide.

(i)

Write a balanced equation for the reaction.

(ii)

What is the name given to this reaction?

(d)

Describe an experiment to show that pressure acts in all directions in a liquid.

(a)

(i)

Self-pollination is the transfer of pollen grains from the anther of a flower to the stigma of the same flower or another flower on the same plant.

(ii)

Cross-pollination is the transfer of pollen grains from the anther of a flower to the stigma of another flower on another plant of the same species.

(b)

Ways in which cross-pollinated plants are better than self-pollinated plants

1. They give rise to strong/vigorous offspring
2. They prevent inbreeding
3. Their offsprings are resistant to diseases
4. The bring about genetic/species variation

(c)

Reaction between dilute hydrochloric acid and sodium hydroxide

(i)

Balanced equation for the reaction

NaOH + HCl → NaCl + H2O

(ii)

Neutralization reaction

(d)

Experiment to show that pressure acts in all directions in a liquid

1. Make holes at the same horizontal plane around a spherical glass/plastic bulb/tank
2. Fill vessel with water/liquid to a convenient level
3. Water/liquid is observed to come out/squirt out through all the holes in all directions to the same horizontal distance
(When pressure is exerted on the water either by the atmospheric or a piston)
4. This shows that at any point in a liquid, pressure acts in all directions

6.

(a)

(i)

What is debeaking?

(ii)

Give two reasons why debeaking in poultry birds is important.

(b)

(i)

A steel needle carefully placed on the surface of water floats. What type of force made the steel needle to float?

(ii)

Name three substances that could be added to the water to make the steel needle to sink.

(c)

(i)

Explain why gold is preferred to iron in the making of jewelleries.

(ii)

State one way of preventing rusting.

(d)

(i)

State two elements of climate.

(ii)

Name the equipment used to measure each of the elements stated in (i) above.

(a)

(i)

Debeaking is the partial removal/trimming of the beak of poultry/domestic bird.

(ii)

Reasons why debeaking in poultry birds is important

1. To prevent vent pecking
2. To check feather pecking/plucking
3. To reduce wastage of feed
4. To check egg eating
5. To check cannibalism

(b)

(i)

Surface tension

(ii)

Substances to reduce surface tension

1. Kerosene
2. Oil
3. Soap/detergent
4. Diesel
5. Petrol

(c)

(i)

Why gold is preferred to iron in the making of jewelleries

Gold does not corrode/rust/react with water and oxygen/air/moisture and therefore maintains/keeps its nature/colour/lustre

(ii)

Ways of preventing rusting

1. Greasing/oiling/lubricating
2. Painting
3. Electroplating
4. Galvanizing
5. Alloying
6. Tin plating
7. Plastic coating
8. Sacrificial protection/cathodic protection

(d)

i Elements of climate ii Equipment used for measurement
Temperature Thermometer
Rainfall Rain gauge
Humidity Hygrometer
Wind direction Wind vane
Wind speed Anemometer
Intensity of light/sunlight Photometer/Light meter
Atmospheric pressure Barometer