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2016 WASSCE (November) Integrated Science Practicals
1. The diagram below is an illustration of a fruit.
Study it carefully and answer the questions that follow.
a) Identify the fruit
b) Name each of the parts labelled I and II.
c) Mention the terms used for removing each of the parts labelled I and II.
d) Give one uses of each of the parts labelled I and II
e) Name one insect pest that infects the fruit.
f) Mention two ways of controlling infestation of the fruit by the pest named in (e) on the field.
a) Identification of fruit
It is maize or corn or cob
b) Name of labelled part
II. (maize) grain or fruit or seed fruit or corn or maize or caryopsis.
c) Terms used for removing labelled part
II. Shelling or threshing
d) Uses of I (husk)
• For wrapping food
• For making mats
• For making local ropes
• For feeding livestock
• For making fire
• For art work
• It protects the grain
Uses if II ( maize grain)
• For food or vegetable
• For corn oil
• For feeding livestock or preparing silage
• For preparing local wine
• For medical purpose or oral rehydration
• For propagation
e) Insect pest of fruit are:
• (Grain) beetle
• (grain) borer
f) Ways of controlling insect pest of fruit
• Early planting
• Early harvesting
• Good farming
• Burning old crop residue
• Exposure to sunshine or dying continuously
• Using pest resistant variety for cultivation
• Biological method or using an organisms to eliminate pest
• Chemical method or use of insecticide or pesticide
2. The diagram below is an illustration of a set-up for carrying out an experimental process in the laboratory. Study the diagram carefully and answer the questions that follow.
a) Name the process the set-up is used for.
b) Name each of the parts labelled I, II, III and IV.
c) Which laboratory apparatus was used to introduce the sodium hydroxide into the part labelled IV?
d) Write a balanced chemical equation for the reaction that occurred in the part labelled IV.
e) Name two indicators that could be used In the experiment
a) Name if process set up is used for
b) Names of labelled parts are as follows;
I is clamp or retort stand;
II is burette;
III is tap or regulator
IV is conical flask.
c) Laboratory apparatus used to introduce sodium hydroxide into IV is pipette.
d) Balanced chemical equation for reaction occurring in IV is:
e) Name of indicators that could be used in the experiment are:
2. Methyl orange
3. In an experiments to investigate the relationship between the heights of five objects and the corresponding heights of the images formed by a pin-hole camera, the objects are placed in turns at a distance in front of the camera and the images projected on screen as illustrated in the diagram below.
The heights of the objects [formula required] and their corresponding image heights [formula required] are given by fig 1 (a) and fig 1 (b) respectively below. Study fig 1(a) and fig 1 (b) carefully and answer the questions that follow.
Scale – 1cm : 5cm
Fig 1 (a)
a) Measure and record the raw objects heights [formula required]
b) Convert the raw objects ‘heights into actual objects’ heights [formula required] using the given scale.
c) Measure and record the raw images’ heights [formula required]
d) Convert the raw images’ height into actual images’ height [formula required] using the given scale.
e) Tabulate the result as shown below.
f) Plot a graph of B on the vertical axis and A on the horizontal axis.
g) Determine the slope, s of the graph.
f) he following is the graph
g) slope =[diagram required]
4. The diagrams A and B below illustrate stages in the germination of two different types of seed over a six-day period.
Study the diagrams carefully and answer the questions that follows.
A [ diagram required] B [diagram required]
a) Name each of the parts labelled I, II, III, IV,V and VI.
b) i) Tabulate two observable differences between the stages in A and B
ii) State two similarities between the stages in A and B.
c) Name the type of germination illustrated by each of the stages in A and B.
d) Explain briefly how the seedlings obtained nourishment during the period.
e) State four environment factors that could affect the growth of the seedlings.
a) Name of labelled part
II. (first) leaf/leaves/foliage
VI. Vi fibrous roots
b) observable differences between stages in A and B
Cotyledon above ground or soil level – Cotyledon below ground or soil level
Radicle develops into a main roots with smaller roots attached – Radicle develops into roots of same size
Hypocotyl present – Absence of hypocotyl
ii) Similarities between stage in A and B
• Both have roots or radicles
• Foliage or first leaves are present in both.
• Cotyledon present in both
• Both germinated
c) Types of germination in
Stage A: epigeal germination
Stage B: hypogeal germination
d) Explanation of how seedlings obtain nourishment
• Food stored in the cotyledons are digested or broken down and absorbed by the embryo initially.
• Later the seedlings absorb sunlight for photosynthesis.
e) Environment factors that could affect the of seedlings
• Water or moisture or humidity or rain fall
• Temperature or (cold or warmth )
• Soil fertility or nutrients
• Soil pH