BECE 2013 Integrated Science Past Question Paper Two

1

 (a) The diagrams below are illustrations of an experiment to demonstrate a biological principle
Study the diagrams carefully and answer the questions that follow

2013-Integrated-Science-paper-2-question-1a-image

(i) Name the parts labelled I and II
(ii) State two difference between the set-ups A and B
(iii) What is the role played by the part labelled I in the experiment?
(iv) Name the biological principle being demonstrated in this experiment
(v) State one way in which plants benefit from the principle named in (iv)
(vi) State one way in which animals benefit from the principle named in (iv)

(b) In an experiment to investigate the reactivity of zinc, a piece of the metal was dropped into a test tube containing dilute hydrochloric acid. The experimental set-up is illustrated below.

Study the set-up carefully and answer the questions that follow.

2013-Integrated-Science-paper-2-question-1b-image

(i) Write a balanced chemical equation for the reaction that occurred in the experiment.
(ii) Name the gas evolved.
(iii) List two metals which can react in a similar way as the zinc
(iv) List two metals which cannot react in a similar way as the zinc.
(v) Name two glass apparatus which could have been used instead of the test tube.

(c) The diagram below is an illustration of a thermos flask
Study the diagram carefully and answer the questions that follow

2013-Integrated-Science-paper-2-question-1c-image

(i) Name the parts labelled I, II, III, IV and V
(ii) How does the device minimize heat loss or gain through
(α) conduction ? (β) convection ? (ʎ) radiation ?
(iii) State one use of the thermos flask

(d) The diagrams below illustrate an experimental set-up on a physical property of soil using three soil types, X, Y and Z
Study the set-up carefully and answer the questions that follow:

 
2013-Integrated-Science-paper-2-question-1d-image

(i) Name the parts of the set-up labelled I, II, III and IV
(ii) Which of the three soil types has the
(α) highest water holding capacity?
(β) least water holding capacity?
(iii) Name each of the three soil types X, Y and Z
(iv) Suggest a suitable title for the experiment

1. (a) (i) PART NAME
I – A hollow yam or potato or pawpaw cup or semi-permeable container
II – A beaker or trough

(ii) Differences between set-ups A and B

Set-up A

Set-up B

The sugar solution is concentrated

The sugar solution is dilute

The level of the distilled water is

high

The level of the distilled water is low

The amount of sugar solution is

smaller

The amount of sugar solution is

greater

(iii) Role played by part I
It serves as a semi-permeable membrane – to allow the movement of water molecules from the water into the sugar solution.

(iv) Biological principle demonstrated
Osmosis

(v) How plants benefit from the named principle (osmosis)
• Absorption of water by the roots of plants
• Transportation of water from the roots to the other parts of the plant
• Movement of water from one plant cell to the other

(vi) How animals benefit from osmosis
• Movement of water into the cytoplasm of some organisms such as amoeba
• Re-absorption of water in the kidney tubules of mammals

(b) (i) Balanced equation for the reaction
Zn + 2HCl ⟶ ZnCl2 + H2
(ii) The gas evolved
Hydrogen gas or H2 (gas)

(iii) Metals that can react in a similar way as the zinc
Lithium, Magnesium, Potassium, Sodium, Calcium, Aluminium, Iron

(iv) Metals that cannot react in a similar way as the zinc
Copper, silver, gold, mercury, platinum

(v) Glass apparatus that could have been used.
Beaker, conical flask, measuring cylinder, flat bottomed flask, gas jar

(c) (i) Parts
I – Cork or plastic/rubber stopper
II – Silvered or shiny surfaced double wall
III – Vacuum or empty space
IV – Cork support or plastic/rubber support
V – Vacuum seal

(ii) How the device minimizes heat loss or gain through
(α) conduction
Minimized by the cork or plastic/rubber stopper and Cork support or
plastic/rubber support
(β) convection
Minimized by the vacuum
(λ) radiation
Minimized by the silvered or shiny surfaced double wall

(iii) Use of the thermos flask
• Maintains the temperature of its contents for a relatively long time, ie, it keeps its hot contents hot and its cold contents cold
• It prevents heat loss or heat gain of its contents for a long period.

(d) (i) PARTS
I – funnel
II – cotton wool
III – measuring cylinder
IV – water

(ii) (α) Highest water holding capacity – Z
(β) Least water holding capacity – X

(iii) SOIL TYPES
X – Sandy
Y – Loamy
Z – Clayey

(iv) Suitable title for experiment
• Experiment to compare the water-holding capacities of sandy, loamy and clayey soils
• Experiment to demonstrate the drainage abilities of sandy, loamy and clayey soils.

2

(b) State four hereditary features in humans

(c) State the energy transformation that takes place in each of the following activities:
(i) dry cell in use;
(ii) solar panel in use;
(iii) electric stove in use;
(iv) hammering of a piece of metal
[4 marks]
(d) State two ways each in which each of the following cultural practices is important in vegetable production:
(i) staking
(ii) pruning

2. (a) Particles which make up matter
• Protons, Neutrons and Electrons

(b) Hereditary features in humans
• Shape of nose
• Size of ear
• Height
• Colour of skin
• Mass
• Colour or eyes
• Temperament
• Intelligence

(c) Energy transformations in the following activities: (i) dry cell in use;
Chemical energy ⟶ electrical energy
(ii) solar panel in use;
Solar / Light energy ⟶ electrical energy
(iii) electric stove in use;
Electrical energy ⟶ heat energy + light energy
(iv) hammering of a piece of metal
Kinetic energy ⟶sound energy + light energy
(d) Importance of the following cultural practices in vegetable production:
(i) staking
• Gives the plants the ability to grow without bending or breaking
• Prevents fruits from getting rotten (as they lie on the ground)
• Enables the plant to get sufficient sunlight needed for healthy growth
• Creates space in-between plants for easier movement of the farmer.

(ii) pruning
• Increases the quality and quantity of crop yield
• Helps to check the spread of pest and diseases
• Enables the plant to get sufficient sunlight needed for healthy growth
• Enhances healthier growth of the plant
• Improves ventilation for the plant

3

(a) (i) What is indiscriminate sex?
(ii) Give two reasons why teenagers indulge in indiscriminate sex.
[4 marks]
(b) Name two sources each of
(i) natural light
(ii) artificial light
[4 marks]
(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

3. (a) (i) Indiscriminate sex
Having sexual intercourse with multiple (two or more) partners and usually without protection (use of condom)

(ii) Reasons why teenagers indulge in indiscriminate sex.
• Curiosity
• Peer pressure
• Poverty
• Illiteracy or ignorance of consequences
• Lack of sufficient recreational avenues
• Broken homes
• Irresponsible parenting
• Low self esteem
• Fallen moral standards of society.
• Lack of self-control

(b) Sources of
(i) natural light
• Sun
• Stars
• Lightning
• Volcanic eruption
• Firefly
• Glow worm
• Anglerfish
• lanternfish

(ii) artificial light
• Moon
• Electric bulb
• Torch
• Matches
• Vehicle headlamps
• Light-emitting diodes (LEDs)
• Light-emitting electrochemical cells (LECs)

(c) Ways in which soil texture is important in crop production.
• It affects soil fertility
• It affects its water-holding capacity
• It affects its nutrient retention
• It affects its plant-holding capacity
• It affects the ability of the soil to resist erosion.
• It affects soil temperature

(d) Systematic name the following chemical compounds:
(i) FeS – Iron (II) sulphide
(ii) CO – Carbon (II) oxide or Carbon monoxide (preferred IUPAC name)
(iii) Cu2O – Copper (I) oxide
(iv) NaOH – Sodium hydroxide



4

 (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 [4 marks]

(c) Classify the first four elements of the periodic table as metals and non-metals
[4 marks]
(d) Name the three types of blood vessels in humans

 
4. (a) (i) What the symbols L, N and E represent in an electric plug
L – live pin
N – neutral pin
E – earth pin

(ii) The function of the fuse box in household electrical wiring
• The fuse box houses and controls the incoming electrical service and distribution to circuits within the house.
• It provides protection against power fluctuation through the use of fuses

(b) Four classes of insect pest based on their feeding habits
• Piercing & sucking insects (eg, aphids, mosquitoes)
• Chewing insects (eg, grasshoppers, beetles, weevils)
• Siphoning insects (eg, moths, butterflies)
• Sponging insects (eg, housefly)

(c) Classification of the first four elements of the periodic table

METALS

NON-METALS

Lithium

Hydrogen

Beryllium

Helium

(d) The three types of blood vessels in humans
• Capillaries
• Veins
• Arteries

5

(a) (i) State the difference between organic fertilizer and inorganic fertilizer
(ii) State two effects of inorganic fertilizer on the environment
[4 marks]
(b) Classify the following substances as acids or bases.
(i) unripe lemon juice;
(ii) wood ash;
(iii) liquid in a car battery;
(iv) bicarbonate of soda
[4 marks]

(c) (i) What is a fruit?
(ii) State two differences between a fruit and a seed.
[4 marks]

(d) State the effect of heat on each of the following substances:
(i) plastics
(ii) alcohol
(iii) metal rod

5. (a) (i) Difference between organic fertilizer and inorganic fertilizer

ORGANIC FERTILIZER

INORGANIC FERTILIZER

Made from animal or plant

matter (natural sources)

Made  from chemicals

(artificial sources)

(ii) Effects of inorganic fertilizer on the environment
• Damage and destruction of plant and animal life, when used in excess
• Contamination of water bodies when rain washes chemicals into them.
• Contributes to the formation of acid rain, when fossil fuels are burnt during their production
• Contributes to the greenhouse effect, , when fossil fuels are burnt during their production
• Nitrogen-containing fertilizers can cause soil acidification

(b) Classification of the following substances as acids or bases.

ACIDS

BASES

Unripe lemon juice

Wood ash

Liquid in a car battery

bicarbonate of soda

(c) (i) A fruit?
A mature ovary containing seed

(ii) Differences between a fruit and a seed.

FRUIT

SEED

A mature ovary

A mature ovule

Contains a seed

Contains an embryo

Pericarp is formed

from the wall of the ripened ovary

The seed coat (testa)

is formed from integuments of ovule.

Cannot germinate

under any condition

Can germinate under

the right conditions.

(d) The effect of heat on each of the following substances:
(i) plastics – Causes melting
(ii) alcohol – Causes boiling or faster evaporation
(iii) metal rod – Causes expansion

6

(a) Classify the following chemical substances based on their uses under the headings as shown in
the table below:
Milk of magnesia, alcohol, paracetamol, sodium hydroxide, N.P.K.

Agriculture

Industry

Medicine

(b) State one use each of the following instruments used in the study of the weather:
(i) rain gauge;
(ii) hygrometer;
(iii) anemometer.

(c) (i) Name two types of transistors.
(ii) Draw and label the circuit symbols of the transistors named in (i)

(d) State three reasons why vegetable farming is important.

6. (a) Classification of:
Milk of magnesia, alcohol, paracetamol, sodium hydroxide, N.P.K.

Agriculture

Industry

Medicine

N.P.K

Alcohol

Sodium hydroxide

Milk of magnesia

Paracetamol

Paracetamol

(b) One use each of the following instruments
(i) rain gauge – To measure the amount of rainfall
(ii) hygrometer – To measure the atmospheric humidity
(iii) anemometer – To measure the speed of wind

(c) (i) Types of transistors.
• PNP transistor
• NPN transistor

(ii) Circuit symbol of PNP transistor

(d) Reasons why vegetable farming is important.
• Source of employment – Income generation or wealth creation
• Foreign exchange earner for the nation, when exported.
• Provision of nutrition for man – Vegetables are very rich in essential vitamins, mineral salts and proteins.
• Certain vegetables help to conserve soil fertility
• Provides raw material for the food processing industry
• Certain vegetables are used in the pharmaceutical industry
• Vegetable take a shorter time to mature, hence it provides greater returns per given time and space.

End Of Paper

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