BECE 2014 Integrated Science Past Question Paper Two

1

 (a) The diagrams below represent the stages in the life cycle of a mosquito

Study the diagrams carefully and answer the questions that follow

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(i) Name each of the stages labeled I, II, III and IV
(ii) State how stage II obtains oxygen
(iii) State two methods of controlling each of the stages labeled III and IV

(b) The diagrams below are different laboratory set-ups used in the separation of mixtures.
Study the diagrams carefully and answer the questions that follow

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(i) Name each of the parts labeled I, II, III, IV and V.
(ii) Name the separation method represented by each diagram.
(iii) Which of the set-ups is used to obtain clear water from muddy water?
(iv) Which of the set-ups is used to obtain salt from salt solution?

(c) The diagrams below show some instruments used in the laboratory.
Study the diagrams carefully and answer the questions that follow

2014-Integrated-Science-paper-2-question-1c-image

(i) Identify each of the instruments labeled I, II, III, IV and V
(ii) State one use of each of the instruments labeled I, II, III and IV
(iii) Read and record the volume of the liquid in the instrument labeled V

(d) The diagram below shows the digestive system of a class of farm animals.
Study the diagrams carefully and answer the questions that follow

 
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(i) Name each of the parts labeled I, II, III and IV
(ii) State one function each of the parts labeled II and IV
(iii) Name two farm animals that possess this type of digestive system.
(iv) Mention two diseases which affect this class of farm animals.

1. (a)
(i) Name of each stage
I. Egg
II. Larva
III. Pupa
IV. Adult / Imago

(ii) How stage II obtains oxygen
The larva comes to the surface of the water body to obtain oxygen from the air through a structure called the siphon.

(iii) Methods of controlling each of the stages labeled III and IV

Controlling stage III
• Adding oil to cover the water surface
• Introduction of fish into the water body
• Spraying the water body with pesticides
• Adding kerosene to cover the water surface

Controlling stage IV
• The use of lethal ovitraps
• The use of mosquito spray / insecticide
• The use of mosquito coil
• Clearing mosquito breeding grounds such as choked gutters, stagnant pools of water, etc

(b)
(i) Name of the part labeled
I. Beaker
II. Evaporating disc
III. Candle
IV. Inverted funnel
V. Tripod stand

(ii) Name the separation method represented by each diagram.
A- Filtration
B- Evaporation
C- sublimation

(iii) The set-up used to obtain clear water from muddy water
Set up A

(iv) The set-up used to obtain salt from salt solution?
Set-up B

(c)
(i) Identification of the instruments labeled I, II, III, IV and V
I. Tape measure
II. stop clock
III. Thermometer
IV. Weighing scale/ Top pan balance
V. Measuring cylinder

(ii) State one use of each of the instruments labeled I, II, III and IV
I. to measure length of materials
II. to measure time
III. to measure temperature
IV. to measure the mass of materials
V. to measure the volumes of liquid substances

(iii) Read and record the volume of the liquid in the instrument labeled V
Volume of liquid = 160 cm3

(d)
(i) Name each of the parts labeled I, II, III and IV
I. – Gullet
II. – Gizzard
III. – Liver
IV. – Crop

(ii) State one function each of the parts labeled II and IV

I. – used to grind food
II. – used to store food temporarily

(iii) Name two farm animals that possess this type of digestive system.

Turkey, fowl, duck, ostrich, geese, guinea fowl.

(iv) Mention two diseases which affect this class of farm animals.
Coccidiosis, fowl typhoid, fowl pox, newcastle disease, pneumonia.

2

(a) (i) Name the two elements that combine to form water.
(ii) Write a balanced chemical equation to show how the water is formed from the named elements

(b) State two ways of maintaining a balance in an ecosystem.

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

(d) Classify the following items as magnetic or non-magnetic substance:
wood, steel blade, rubber and glass jar.

(a) (i) Name the two elements that combine to form water.

Hydrogen and oxygen

(ii) Write a balanced chemical equation to show how the water is formed from the named elements
H2 + ½ O2 H2O OR
2H2 + O2 2H2O

(b) State two ways of maintaining a balance in an ecosystem.
• Stopping indiscriminate felling of tress
• By enforcing environmental protection laws; United Nation resolutions on release of poisonous gases should be adhered to.
• Activities of mining industries should be strictly monitored.
• Poaching of animals for their parts should be stopped

(c) (i) What is a fertile soil?

Soil that has the ability to supply the required nutrients needed for plant growth

(ii) State two factors that cause loss of soil fertility.
• Soil erosion,
• leaching,
• excessive irrigation,
• over cropping,
• surface compacting.

(d) Classify the following items as magnetic or non-magnetic substance:
wood, steel blade, rubber and glass jar.

Magnetic substance – steel blade
Non-magnetic substance – wood, rubber and glass jar.

3

 (a) (i) What is germination of seed?
(ii) State two conditions necessary for the germination of seed.

(b) State four methods used in identifying farm animals

(c) Explain why it is easier to cut a piece of yam with a sharp knife than with a blunt knife

(d) State three differences between a metal and a non-metal.

3. (a) (i) What is germination of seed?
The process by which a viable seed grows/develops into a seedling.

(ii) State two conditions necessary for the germination of seed.
• Presence of air
• Presence of water
• Viable seed
• Optimum temperature

(b) State four methods used in identifying farm animals
Tagging, tattooing, branding, tonging, ear notching

(c) Explain why it is easier to cut a piece of yam with a sharp knife than with a blunt knife
The cutting edge of a sharp knife has very small surface area so requires smaller force to yield the pressure needed to cut the yam – making cutting easy, but the cutting edge of a blunt knife has a relatively larger surface area so it needs a larger force to yield the pressure needed to cut the yam.

(d) State three differences between a metal and a non-metal.

Metals

Non-metals

Have high melting point

Have low melting point

Are lustrous

Are not lustrous

Are malleable

Are not malleable

Have high density

Have low density

Are ductile

Are brittle

Are good conductors of heat and electric current

Are poor conductors of heat and electric current

4

 (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.

4. (a) (i) What is debeaking?
The process by which about half the beak of a bird is removed
or
The process of removing the upper part of the beak of a bird

(ii) Give two reasons why debeaking in poultry birds is important.
• To prevent wasting of food
• To prevent egg eating
• To prevent vent pecking
• To prevent injuring other birds

(b) (i) A steel needle carefully placed on the surface of water floats. What type of force made the steel needle to float?
Surface tension

(ii) Name three substances that could be added to the water to make the steel needle to sink.
Oil, detergent, grease, kerosene, soap

(c) (i) Explain why gold is preferred to iron in the making of jewelleries.
It does not react with substances like water and oxygen.
It does not rust
It is very malleable

(ii) State one way of preventing rusting.
• Applying oil to the surface of the metal
• Galvanizing the metal
• Keeping the metal inside a desiccator
• Alloying the metal

(d) (i) State two elements of climate
Temperature,
rainfall,
relative humidity,
light intensity,
wind speed,
wind direction,
atmospheric pressure

(ii) Name the equipment used to measure each of the elements stated in (i) above.
ELEMENT – EQUIPMENT
Temperature – Thermometer
rainfall, – rain gauge
relative humidity, – hygrometer
light intensity, – photometer
wind speed, – wind vane
wind direction, – anemometer
atmospheric pressure- barometer

5

 (a) (i) What is refraction of light?
(ii) Sketch a diagram to show the path of a light ray when it travels from air to glass.

(b) Explain why it is difficult to separate iron and sulphur mixture after strong heating.

(c) (i) Give two example of digestive enzymes produced in humans.
(ii) For each of the enzymes given in (i), name the part of the human body where the enzyme is produced.

(d) List four methods of applying fertilizers to crops.

5. (a) (i) What is refraction of light?
The bending of light rays as it travels from an optically less dense medium to an optically more dense medium

(ii) Sketch a diagram to show the path of a light ray when it travels from air to glass.

(b) Explain why it is difficult to separate iron and sulphur mixture after strong heating.
This is because after strong heating, the iron and sulphur react to form iron (II) sulphide which cannot be separated by physical means

(c) (i) Give two example of digestive enzymes produced in humans.
Salivary amylase,
pepsin,
renin,
lipase,
trypsin,
pancreatic amylase,
maltase

(ii) For each of the enzymes given in (i), name the part of the human body where the enzyme is produced.
ENZYME PART WHERE ENZYME IS PRODUCED
Salivary amylase Mouth
pepsin, stomach
rennin stomach
lipase pancreas
trypsin pancreas
pancreatic amylase pancreas
maltase small intestine

(d) List four methods of applying fertilizers to crops.
Drilling, broadcasting, side dressing , top dressing, ringing,

6. (a) Consider the substance listed below:
carbon dioxide, gold, bronze, iron, oxygen and ink

From the list, select the substance that:
(i) supports burning – oxygen
(ii) is used as jewellery; – gold
(iii) is used for making statues – bronze

(b) (i) Name two diseases associated with the circulatory system of humans.
Arteriosclerosis, coronary thrombosis, heart cancer, leukimea, high blood pressure, piles, varicose vein

(ii) State one way of preventing each of the diseases named in (i)
Arteriosclerosis-
• regular exercising of the body
• avoid smoking
• low fat intake

Piles-
• intake a lot of water
• eat a lot of vegetables and fruits

High blood pressure-
• regular exercising of the body
• low salt intake
• low fat intake
Varicose vein- surgical removal of vein

(c) Give two examples of each of:
(i) major plant nutrients;
Nitrogen, phosphorus, sulphur, potassium, calcium, magnesium.

(ii) minor plant nutrients.
Chlorine, iron, fluoride, manganese, molybdenum

(d) (i) State two properties of a good thermometric liquid.
• Remains a liquid within a wide temperature range
• It must not wet class
• Expands uniformly with a rise in temperature
• It must not vaporize easily

(ii) Give two examples of a good thermometric liquid.
Mercury and alcohol

6

 (a) Consider the substance listed below:
carbon dioxide, gold, bronze, iron, oxygen and ink

From the list, select the substance that:
(i) supports burning
(ii) is used as jewellery;
(iii) is used for making statues

(b) (i) Name two diseases associated with the circulatory system of humans.
(ii) State one way of preventing each of the diseases named in (i)

(c) Give two examples of each of:
(i) major plant nutrients;
(ii) minor plant nutrients.

(d) (i) State two properties of a good thermometric liquid.
(ii) Give two examples of a good thermometric liquid.

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End Of Paper

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