BECE 2018 Integrated Science Past Question Paper Two

1

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

2018-Integrated-Science-paper-2-question-1a-image
(i) Identify the fish
(ii) Name each of the parts labelled I, II, IV, V
(iii) Name the habitat of the fish
(iv) Explain how each of the parts labelled III and VI enables the fish adapt to its habitat.

(b) The diagram below is an illustration of a section through the soil.
Study the diagram carefully and answer the questions that follow.

2018-Integrated-Science-paper-2-question-1b-image

(i) What does the diagram represent?
(ii) Name each of the parts labelled I, II, III, IV
(iii) Which part of the diagram:
(α) is the richest in humus?
(β) is the habitat for soil organisms?
(γ) undergoes weathering?
(iv) What is the effect of heavy rainfall on the part labelled I?

(c) The diagram below is an illustration of an electrical circuit.
Study the circuit and answer the questions that follow.

2018-Integrated-Science-paper-2-question-1c-image

(i) Name each of the parts labelled I, II, IV, VI
(ii) State the energy transformation that takes place in:
(α) I
(β) IV
(iii) State the S.I. units of the quantity measured by each of the parts labelled
(α) III
(β) V
(iv) State the function of the part labelled VI

(d) In an experiment, equal volumes and equal concentrations of dilute hydrochloric acid and dilute sodium hydroxide solutions were each placed in different test tubes.
Read the following statements carefully
I. Both red and blue litmus papers were dipped into each of the solutions in turns.
II. Equal volumes of the solutions were mixed to obtain a third solution.
III. Both red and blue litmus papers were dipped into the third solution.
Use the information provided to answer the following questions.

(i) Explain briefly how you can identify each of the solutions.
(α) Hydrochloric acid;
(β) Sodium hydroxide.
(ii) State the type of reaction that occurred when the two solutions were mixed.
(iii) What type of solution was formed when the reaction stated in (ii) occurred?
(iv) State what would be observed when both red and blue litmus papers were dipped into the third solution.
(v) Explain how the solid portion of the solution named in (iii) could be obtained.

1(a)

(i)
• Bony fish
• Tilapia

(ii)
I – mouth
II – gill cover / operculum
IV – scales
V – lateral line

(iii)
• Fresh water
• river
• lake
• fish pond
• lagoon
• brackish water

(iv)
III – used for
• swimming
• movement
• pitching

IV – used for wide vision / seeing

1(b)

(i) Soil Profile

(ii) I – Top soil / humus
II – Sub-soil
III – weathered rock / material
IV – parent rock / unweathered rock / bedrock / rock layer

(iii) (α) I / top soil

(β) I / top soil

(γ) II – Sub-soil
III – weathered rock / material
IV – parent rock / unweathered rock / bedrock / rock layer

(iv)
 leaching
 erosion

1(c)

(i)
I – cell
II – key / switch
IV – resistor
V – rheostat / variable resistor / resistance box

(ii) (α) I – chemical energy to electrical energy
(β) IV – electrical energy to heat energy

(iii) State the S.I. units of the quantity measured by each of the parts labelled
(α) III – ampere / amperes / A
(β) V – volt / volts / V

(iv)  It is used to regulate current
 It is used to control current
 It is used to vary current

1(d)

(i)
I – cell
II – key / switch
IV – resistor
V – rheostat / variable resistor / resistance box

(ii) (α) I – chemical energy to electrical energy
(β) IV – electrical energy to heat energy

(iii) State the S.I. units of the quantity measured by each of the parts labelled
(α) III – ampere / amperes / A
(β) V – volt / volts / V

(iv)  It is used to regulate current
 It is used to control current
 It is used to vary current

2

(a) (i) What is an ion?
(ii) State two methods of softening hard water.

(b) (i) Differentiate between pests and parasites as used in agriculture.
(ii) Give an example each of a:
(α) pest;
(β) parasite

(c) (i) What is work?
(ii) A force of 10 N causes a body to move a distance of 5.2 m in the direction of the force. Calculate the work done.

(d) Name two diseases associated with the circulatory system of humans

(a) (i)  A charged atom
 A charged group of bonded atoms
 An atom that has lost or gained electron(s)
 A group of bonded atoms that has lost or gained electron(s)

(ii)
 Distillation
 Boiling
 Adding washing soda / sodium carbonate (Na2CO3)
 Deionization
 Using ion exchange resin

(b) (i)

PEST

PARASITE

Any organism that causes damage to crops or animals

A living organism that lives on the surface or inside the body of another living organism/host and gets its food from it and thereby causes harm to the host

(ii)(α) pest

 rats,
 bats
 houseflies,
 cockroaches,
 mice,
 fleas,
 etc

(β)

 worms (tapeworm, hookworm, fluke, roundworm etc),
 arthropods /insects (tick, louse, flea, etc),
 protozoa (plasmodium, etc)
 etc

(c) (i) Work is done when a force moves a body through a given 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 = f × d,
where f = force; and d = distance moved in the direction of the force.

(ii)
Work done = force × distance
= 10 × 5.2
= 52 joules or 52 J

(d)  hypertension
 hypotension
 haemorrhoids (piles)
 arteriosclerosis

3

(a) (i) What is malnutrition?
(ii) State one symptom each of the following deficiency disease:
(α) scurvy;
(β) rickets.

(b) Draw the potassium atom and show the distribution of electrons in its shells.
[K = 19]

(c) (i) Define potential energy
(ii) An object of mass 10 kg is moving at a velocity of 2 ms–1 .
Calculate the kinetic energy of the object

(d) State one example each of :
(i) macro nutrients;
(ii) micro nutrients.

(a) (i)
A condition that occurs when a person is not obtaining enough food nutrients
OR
A condition that results from eating a diet in which nutrients are either not enough / are too much such that the diet causes health problems
OR
A lack of proper nutrition caused by not eating enough of the right food
OR
A condition which occurs when there is a deficiency of certain vital nutrients in a person’s diet
OR
A condition caused by lack of a balanced diet and therefore lacking essential food nutrients.

(ii) (α) scurvy

 bleeding gums
 weakness
 bruising
 fatigue
 rashes

(β) rickets

 bow legs
 poor bone formation
 delayed growth
 pain in the spine

(b)

 
2018-Integrated-Science-paper-2-question-3b-answer-image

(c) (i)
It is the energy possessed by a body due to its relative position
OR
The energy a body possesses as a result of its position relative to others

(ii)
Kinetic energy = ½ mv2 , where m = mass of body; and v = velocity
= ½ × 10 × 22
= ½ × 10 × 2 × 2
= 20 joules or 20 J

(d)
(i) macro nutrients;

 Nitrogen / N
 Phosphorus / P
 Potassium / K
 Calcium / Ca
 Magnesium / Mg
 Sodium / Na

(ii) micro nutrients.

 Copper / Cu
 Zinc / Zn
 Molybdenum / Mo
 Iron / Fe
 Boron / B
 Cobalt / Co

4

(a) (i) Explain the term hazard.
(ii) List two safety precautions against hazards in the teaching and learning of science.

(b) In a tabular form state three differences between osmosis and diffusion.

(c) (i) What is weather?
(ii) State two differences between weather and season.

(d) (i) What is a fertile soil?
(ii) State two factors that cause loss of soil fertility.

(a) (i) Hazard is a danger / risk that could result in physical harm to people or damage to property
OR
A source of potential damage / harm / adverse health effect on something or someone

(ii)  wearing protective clothing / boots / goggles
 routine maintenance of equipment
 closing all taps before leaving the laboratory
 switching off all electrical points
 mounting hazard signs of dos and don’ts in the laboratory / working area
– etc

(b)

Osmosis

Diffusion

Movement of water molecules only

Movement of any particle / chemical substance

Requires a semi-permeable membrane

Does not require a semi-permeable membrane

Moves from a dilute solution to concentrated solution

Moves from a concentrated region to a less concentrated region

Occurs in liquids only

Occurs in both liquids and gases / fluids

(c) (i)
It is the atmospheric conditions at a place over a short period of time
OR
It is the day to day conditions / changes of the atmosphere / environment
OR
It is the state of the atmosphere / environment describing the day to day temperature, humidity, cloud cover , atmospheric pressure, wind or precipitation activity.

(ii)

Weather

Season

Changes daily / in a few hours

Lasts for about 3 or 4 months

Caused by atmospheric conditions

Caused by the revolution of the earth

Relatively short termed

Relatively long termed

Covers relatively smaller areas

Covers relatively larger area

Does not influence plants or animal habitat

Influences plant or animal habitat

Not influenced by distance from the sun

Influenced by distance from sun

Measurable

Not measurable

(d) (i)
A soil that has sufficient/adequate plant nutrients to support healthy plant growth
OR
A soil that has all major nutrients for plant nutrition and others to support plant growth
OR
A soil that is able to provide all essential plant nutrients in available forms for the healthy growth of plants

(ii)

 Removal of top soil by erosion
 Removal of nutrients by crops / depletion / nutrient mining
 Sand winning / physical degradation of soil / poor soil structure / water logging / compaction, etc
 Decreased soil bioactivity
 Soil acidification / salinization / alkalization
 leaching
 overcropping
 overgrazing
 erosion
 excessive burning / bush burning / wildfires /
 Indiscriminate use of agrochemicals / soil pollution
 inefficient soil management practices
 etc

5

(a) (i) What is a magnetic field?
(ii) Name two methods of making magnets

(b) Explain briefly the term teenage pregnancy

(c) Write the formula for each of the following compounds:
(i) calcium chloride;
(ii) copper (I) oxide;
(iii) nitrogen (IV) oxide;
(iv) ammonia

(d) (i) List three physical properties of soil.
(ii) What is the texture of clayey soil?

(a) (i)It is a region / area around a magnet within which the magnetic force can be felt
OR
It is an area around a moving electric charge within which the force of magnetism acts

(ii)  Induction
 Stroking
 The use of electricity
 Hammering / hitting

(b)
When a girl under the age of 20 years conceives / takes seed.
OR
When a female person below 20 years gets pregnant

(c)

(i) calcium chloride; – CaCl2
(ii) copper (I) oxide; – Cu2O
(iii) nitrogen (IV) oxide; – NO2
(iv) ammonia – NH3

(d) (i)

 texture
 structure
 temperature
 colour
 strength / consistence
 permeability
 water
 air
 porosity
 drainage
 capillarity
 organism

(ii)
 It is smooth /
 It is slippery / sticky when wet.

It is a region / area around a magnet within which the magnetic force can be felt
OR
It is an area around a moving electric charge within which the force of magnetism acts

6

(a) (i) What are derived quantities?
(ii) State the S.I. units of the following quantities:
(α) area;
(β) volume.

(b) (i) State two factors necessary for photosynthesis
(ii) Explain the functions of each of the factors stated in (i)

(c) Explain each of the following terms:
(i) soft water;
(ii) hard water.

(d) State three reasons why some seeds are nursed.

a) (i) They are quantities which are combination / multiples / ratios of base / fundamental quantities.

(ii)(α) area – m2 / square metre
(β) volume. – m3 / cubic metre
[Note: metre square or metre cube is wrong]

(b) (i)  sunlight
 chlorophyll
 carbon dioxide
 water

(ii)

Chlorophyll –
 Absorbs sunlight
 Traps light

Sunlight –
 Provides energy /
 Separates the hydrogen and oxygen atoms of water

Water –
 Raw material
 Combines with carbon dioxide to produce food
 Splits into oxygen, hydrogen ions and electrons to replace the host electrons

Carbon dioxide –
 Raw material
 Used in splitting water
 Reduced to sugar

(c)
(i) soft water;
 It is water that lathers easily / readily with soap
 It is water that does not contain Ca or Mg ions / salts
 It is water that contains negligible quantities of Ca2+ or Mg2+

(ii) hard water.
 It is water that does not lather easily with soap
 It is water that contains Ca or Mg ions / salts
 It is water that contains Ca2+ or Mg2+

(d)

(i) some seeds are unable to withstand adverse weather conditions
(ii) provides favorable growth conditions
(iii) better protection / care for seedlings
(iv) enables selection of healthy seedlings
(v) some seeds need special treatment to enhance germination / better germination
(vi) eliminates problems of unfavorable soil conditions
(vii) easy control of weeds
(viii) reduces field management cost
(ix) improves crop growth uniformity
(x) nursed seeds provide higher yield

End Of Paper

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