KUULCHAT
SCIENCE MOCK

OBJECTIVE TEST

1.

Fishponds are often stocked using

A.

anchovies.

B.

fingerlings.

C.

fish eggs.

D.

frys.

Answer: B

2.

The chemical symbol of potassium is

A.

K.

B.

N.

C.

P.

D.

S.

Answer: A

3.

The component of the soil which is made up of the finest particle is

A.

clay.

B.

humus.

C.

loam.

D.

sand.

Answer: A

4.

Water is sometimes referred to as a universal solvent because it

A.

is the purest liquid on earth.

B.

is the commonest liquid on earth.

C.

is found in all living cells.

D.

dissolves most substances.

Answer: D

5.

Which of the following step(s) is/are required in the scientific method?

I. Formulation of hypothesis

II. Identification of the problem

III. Experimentation

A.

I only

B.

II only

C.

II and III only

D.

I, II and III

Answer: D

6.

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

7.

The liquid component of the blood is known as

A.

cytoplasm.

B.

haemoglobin.

C.

plasma.

D.

platelets.

Answer: C

8.

Which of the following is the organic part of the soil?

A.

Mineral salts

B.

Water

C.

Rock particles

D.

Air

E.

Humus

Answer: E

9.

Some plants shed their leaves during the dry season to prevent

A.

water loss.

B.

heat loss.

C.

catching fire.

D.

losing nutrients.

Answer: A

10.

Which of the following is not a function of the lens in the human eye? It

A.

allows light rays to pass through it

B.

refracts the light rays passing through it

C.

helps to focus the image onto the retina

D.

becomes thinner when focusing a distant object

E.
reflects part of the light rays falling on it

Answer: E

11.

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.

12.

An advantage of practicing organic farming is that it

A.

increases soil fertility.

B.

reduces pest infestation.

C.

reduces toxicity levels in plants.

D.

increases resistance to plant disease.

Answer: D

Organic Farming

Organic farming can be defined as an agricultural process that uses biological fertilizers and pest control acquired from animal or plant waste.

Advantages of organic farming

1. It creates higher natural levels of resistance to pests and disease
2. This farming process supports a healthier soil and supports pollinators.
3. There are no worries about genetically modified foods with organic farms
4. The working environment for organic farmers is healthier
5. Organic farmers can often create their own fertilizers at their farming location

13.

Which of the following structures contain cellulose?

A.

Cell wall

B.

Cell membrane

C.

Chloroplast

D.

Mitochondrion

Answer: A

14.

The current flowing through a resistor of resistance 10 ohms is 2.5 A. What is the potential difference between the two terminals of the resistor?

A.

4V

B.

12.5 V

C.

25 V

D.

50 V

Answer: C

Voltage = Resistance x Current (IR)

Voltage = 10 x 2.5 = 25 V

15.

The space occupied by matter is its

A.

area.

B.

mass.

C.

volume.

D.

weight.

Answer: C

16.

Which of the following pairs of energy sources is environmentally friendly?

A.

Coal and thermal energy

B.

Wind and biogas

C.

Wind and coal

D.

Biogas and thermal energy

Answer: B

Renewable energy sources are environmentally friendly.

17.

The force which is able to hold light objects on the surface of liquids is called

A.

surface tension

B.

friction

C.

capillarity

D.

viscosity

E.
cohesion

Answer: A

18.

The irregular emptying of the bowels is the cause of

A.

constipation.

B.

diarrhea.

C.

headache.

D.

stomach ache.

Answer: A

19.

Which of the following statements about the negative use of Science and Technology is correct? It

A.

promotes good health.

B.

promotes easy communication.

C.

enable humans to use less energy in working.

D.

creates things that are dangerous to the environment.

Answer: D

20.

Which of the following is the best method of preventing skin disease?

A.

The use of perfume on the skin

B.

The use of bleaching cream on the skin

C.

Avoiding contact with diseased person

D.

keeping the skin clean by washing it regularly

E.

Changing of clothes regularly

Answer: D

21.

Which of the following activities are cultural practices used in tomato cultivation?

I. Pest control

II. Picking out

III. Fertilizer application

A.

I and II only

B.

I and III only

C.

II and III only

D.

I, II and III

Answer: B

22.

Which of the following plants has its leaves modified for storing food?

A.

Ginger

B.

Onion

C.

Pineapple

D.

Tomato

Answer: B

Onion which is also known as bulb onion is a vegetable that is cultivated throughout the world. It belongs to the genus of Allium. Onions are the modified leaves of the plant that become fleshy as they store water, food materials and mucilage of the plants.

Onion contains 89% water, 9% carbohydrates (including 4% sugar and 2% dietary fibre), 1% protein, and negligible fat. Onion also adds a savoury flavour to dishes without adding to its calories.

23.

The S.I unit of energy is represented as

A.

Joule.

B.

joule.

C.

j.

D.

Js.

Answer: A

The unity name begins with a Capital letter and symbol is capital J.

24.

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

A.

egg

B.

imago

C.

larva

D.

pupa

Answer: C

25.

Arrange the following types of water in order of increasing hardness.

I. Tap water
II. Sea water
III. Distilled water
IV. Rain water

A.

IV, III, II, I

B.

III, IV, I, II

C.

II, I, IV, III

D.

I, II, III, IV

Answer: B

Increasing means from the lowest to the highest.

Hard water is water that does not lather easily/readily with soap/water which contains Ca2+/Mg2+/Ca/Mg ions/salt.

26.

Which of the following resources does not produce energy?

A.

Coal

B.

Sand

C.

Water

D.

Wind

Answer: B

27.

The proper way of maintaining soil structure and fertility is termed as soil

A.

conservation

B.

depletion

C.

profile

D.

erosion

Answer: A

28.

Which of the following instruments is connected in parallel across a resistor in an electrical circuit?

A.

Ammeter

B.

Voltmeter

C.

Ohmmeter

D.

Galvanometer

Answer: B

Voltmeter: is used to measure the potential difference between two points in an electrical circuit and its connected in parallel in an electric circuit

Ammeter: is used to measure the electric current in an electric circuit and it is connected in series in an electric circuit

Galvanometer: is used to detect the presence of small electric current and voltage and its connected in series

Ohmmeter: is used to measure the electrical resistance

29.

Plants lose water through a process called

A.

photosynthesis

B.

fertilization

C.

transpiration

D.

respiration

E.
evaporation

Answer: C

30.

Which of the following preventive measures is not used in the control of tuberculosis?

A.

Isolating the patient

B.

Spitting carelessly in the environment

C.

Keeping separate cutlery, plates, cups for the patient

D.

Vaccinating young babies with BCG vaccine

E.
Spitting into a container partly filled with disinfectant

Answer: B

31.

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

32.

The main reason for staking tomato is to ensure

A.

bigger fruit development.

B.

air circulation on the farm.

C.

upright growth of the plant.

D.

that fruits do not get rotten.

Answer: D

Staking tomatoes provides support to help keep plants off the ground while assisting in their upward growth habit.

Because many diseases and insects start at the ground level, using a structured system to keep them away from ground contact is prudent.

Staking can also be used to prevent the fruit from beginning to rot as it sits on the ground as the stalk grows overtime.

33.

Which of the following substances causes acid rain when released into the atmosphere?

A.

Carbon dioxide

B.

Water vapour

C.

Sulphur dioxide

D.

cement dust

Answer: C

Sulfur dioxide reacts with water to form sulfurous acid (H2SO3) as the product.

S02(g) + H2O(l) → H2SO3(l)

34.

Which of the following items converts chemical energy to electrical energy?

A.

Dry cell

B.

Electric bulb

C.

Loudspeaker

D.

Microphone

Answer: A

35.

The best soil for plant growth consists of correct proportion of

A.

clay, gravel and sand.

B.

clay and humus.

C.

clay, humus and sand.

D.

clay and sand.

Answer: C

36.

In which of the following electrical appliances is electrical energy mainly converted to heat energy?

A.

Cooker

B.

Fan

C.

Refrigerator

D.

Tape recorder

E.
Television set

Answer: A

37.

The lion is a typical example of

A.

a pet

B.

a carnivore

C.

an omnivore

D.

a herbivore

E.
a parasite

Answer: B

38.

Which of the following parts of the human body are sense organs?

I. Tongue
II. Hair
III. Nose
IV. Skin

A.

I and IV only

B.

II and III only

C.

I, II and III only

D.

I, III and IV only

E.

I, II, III and IV

Answer: D

39.

Water that needs a small amount of soap to form lather is described as

A.

clean.

B.

hard.

C.

pure.

D.

soft.

Answer: D

40.

An atom 2311X forms bond by losing one electron, the charge on the ion formed is

A.

-1

B.

-2

C.

+1

D.

+2

Answer: C

When an atom loses an electron it has positive charge (Cation) and gain negative charge (Anion)

Since the atomic number is 11, the atom in question is Sodium (Na). Sodium has +1 charge (Na+1 = Na+) when it loses an electron during the bond.

THEORY QUESTIONS

1.

(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 = Work done Time taken

(e)

Method of separation used in the production of:

(i)

akpeteshie (alcohol) → Distillation

(ii)

common salt → Evaporation/crystallisation

(iii)

tap water → Filtration/sedimentation/coagulation

2.

(a)

(i)

Mention the three states of matter.

(ii)

State the two methods by which one state can be converted to another.

(b)

A bag of cement is pulled along a smooth horizontal floor with a horizontal force of 1000 N.

If the work done is 100,000 J, calculate the distance through which the bag is pulled.

(c)

(i)

Draw the side view of a bony fish and label the parts.

(ii)

Explain how the fish takes in oxygen.

(iii)

For each of the following animals name two parts which help it to live in its environment

α)

Bird

β)

Fish

(a)

(i)

The three states of matter

Solid, liquid and gas.

(ii)

Methods by which one state can be converted to another

1. Melting
2. Boiling
3. Evaporation
4. Freezing
5. Condensation
6. Sublimation

(b)

Work done = Force x Distance

Work done = 100000 J
Force = 1000 N

100000 J = 1000 N x Distance

Divide both sides by 1000 N

Distance = 100 000 J 1000 N = 100 m

(c)

(i)

Labelled parts of the side view of a body fish

(ii)

How the fish takes in oxygen

1. Water enters the mouth and passes over the gills
2. The blood in the gills absorbs the oxygen dissolved in the water

(iii)

α)

Parts of the bird which help it to live in its environment

1. Wings
2. Feet
3. Feathers
4. Air sacs
5. Beak
6. Hollow bones
7. Tail

β)

Parts of the fish which help it to live in its environment

1. Fins
2. Gills
3. Scales
4. Lateral line
5. Tail
6. Mouth
7. Swim bladder

3.

a)

State three ways in which crop rotation is important in crop production.

b)

State three properties of the image formed by a plane mirror.

c)

i)

What is photosynthesis?

ii)

Explain briefly why a digestive system is necessary in humans.

d)

Give the systematic name of the following compounds:

i)

α)

MgCl2;

β)

FeS.

ii)

What is an element?

iii)

What is the name given to a solid mixture?

a)

Importance of crop rotation

1. Increases soil fertility/Adds nitrogen to soil
2. Enhances soil structure
3. Prevents soil erosion
4. Improves soil nutrients and nutrient uptake regulation
5. Controls the spread of pests and diseases
6. Controls weed easily
7. There is effective use of the land
8. Harvest of different types of crops on the same piece of land

b)

Properties of image formed by a plane mirror

1. It is virtual
2. It is upright
3. Same size/shape as the object
4. The distance of the object from the plane mirror is the same as the distance of the image from the plane mirror
5. It is laterally inverted

c)

i)

Photosynthesis is the process by which green plant produces their own food/carbohydrate/glucose/starch using carbon dioxide and water with the presence of sunlight and chlorophyll.

ii)

Importance of digestive system

It breaks down food so that it can be used by the body for energy/cell growth or repair

d)

i)

Systematic Names

α)

MgCl2 → Magnesium Chloride

β)

FeS → Iron (II) sulphide

ii)

Element is a simple substance that cannot be broken down into smaller parts or changed into another substance or a substance whose atoms are of the same kind

iii)

The name given to a solid mixture is an alloy

4.

a)

i)

What is a hormone?

ii)

Copy and complete the following table.

Name of hormone Organ secreting hormone Function of hormone
Adrenalin
Thyroxin
Insulin

b)

Ammonia gas is prepared in the laboratory by heating ammonium chloride and calcium hydroxide.

i)

Write a balanced equation for the reaction.

ii)

How is ammonia gas tested in the laboratory?

iii)

State one use of ammonia.

c)

i)

Name four types of forces.

ii)

A boy used a catapult to kill a bird which was on a tree and it fell to the ground.

Give two forces involved in this process.

a)

i)

Hormones are chemical substances produced by special endocrine/ductless glands in the body to enable certain organs function properly.

ii)

Name of hormone Organ secreting hormone Function of hormone
Adrenalin Adrenal gland Prepares the body for fear/flight/fright emergency/fight/defense
Thyroxin Thyroid gland Body metabolism/growth
Insulin Pancreas/Islets of Langerhans Regulates body sugar level/blood sugar level

b)

i)

2NH4Cl + Ca(OH)2 → CaCl2 + 2NH3(g) + 2H2O

ii)

How to test for ammonia gas

1. Ammonia turns moist red litmus paper blue
2. Ammonia produces white fumes when it reacts with concentrated hydrochloric acid (HCl)

iii)

Uses of ammonia

1. For preparation of ammonium nitrate/fertilizers
2. Used in the textile industry
3. Used as a laboratory reagent

c)

i)

Types of forces

1. Force of gravity
2. Weight
3. Magnetic force
4. Electrostatic force
5. Frictional force
6. Centripetal force
7. Viscous force
8. Tensional/Elastic force
9. Adhesion
10. Cohesion
11. Centrifugal force

ii)

1. Tensional/Elastic force
2. Force of gravity
3. Frictional force

5.

(a)

(i)

Explain the term bedwetting?

(ii)

State two diseases that may result from bedwetting.

(b)

(i)

State the difference between hard water and impure water.

(ii)

Give the stages involved in the treatment of water for a community.

(c)

A piece of stone has a mass of 36.0 g. When it is put into water in a glass container, the level of water rises from 60.0 cm3 to 90.0 cm3.

(i)

Calculate the density of the stone.

(ii)

Explain what will be observed when the stone is put into another liquid of density 1.4 gcm-3?

(a)

(i)

Bedwetting is the unconscious release of urine while asleep.

(ii)

Diseases that may result from bedwetting

1. Skin rashes
2. Yaws
3. Eczema
4. Sores

(b)

(i)

Hard water is water that does not lather easily with soap while impure water contains other dissolved substances/foreign materials/bacteria and not good for human consumption.

(ii)

Stages involved in the treatment of water for a community

1. Filtration by passing water through gravel beds
2. Sedimentation by adding alum
3. Chlorination by adding chlorine (to kill germs)
4. Aeration by exposing water to air to remove odour/improve taste
5. Storage and/or distribution

(c)

(i)

Density = Mass Volume

Volume = Final volume - Initial volume

Volume = 90 cm3 - 60 cm3
Volume = 30.0 cm3

Density = 36.0 g 30.0 cm3

Density = 1.2 gcm-3

(ii)

The stone will float in the liquid because the density of the stone is less than that of the liquid.

6.

a)

i)

Mention four female sexual characteristics of a human being.

ii)

Name two sense organs in mammals

iii)

Give one function of each of the sense organs named

b)

Define each of the following terms:

i)

compound

ii)

mixture

c)

List the particles that make up an atom.

d)

State the energy changes that take place in each of the following processes.

i)

An orange falls from a tree to the ground

ii)

A carpenter hits a nail with a raised hammer.

a)

i)

Female sexual characteristics of a human being

1. Vagina
2. Ovaries
3. Womb/uterus
4. Fallopian tubes
5. Cervix
6. Vulva
7. Breast

ii)

Sense organs in mammals

1. Eyes
2. Ears
3. Nose
4. Tongue
5. Skin

iii)

Function of the sense organs

1. Eyes → for sight
2. Ears → for hearing
3. Nose → for smelling
4. Tongue → for tasting
5. Skin → for feeling and excreting sweat

b)

i)

A compound is the substance formed as a result of the chemical combination of two or more elements.

OR

A compound is a substance which is made up of two or more elements chemically combined.

ii)

A mixture is what is formed when two or more substances are combined physically

OR

A mixture is the substance formed as a result of the physical combination of two or more substances which can be separated by physical means.

c)

The particles that make up an atom

Proton, neutron and electrons

d)

Energy changes

i)

An orange falls from a tree to the ground

Potential energy → Kinetic energy → Sound energy + Heat energy

ii)

A carpenter hits a nail with a raised hammer

Potential energy → Kinetic energy → Sound energy + Heat energy