In this WASSCE exam post, candidates will find 2022 WASSCE questions and answers, which is an Integrated Science Trial Test for both school and private candidates.
The questions are followed by suggested answers to help candidates prepare for the upcoming examination in August and September.
2022 WASSCE Trial Questions for Integrated Science
a) State two precautions each to be taken when carrying out the following practices in fish farming:
(i) stocking of the pond with fingerlings;
(ii) feeding of growing fish in a pond
(b) State one function each of the following reproductive hormones:
(i) oestrogen;
(ii) testosterone
(iii) progesterone
(iv)prolactin
(c)Explain each of the following observations:
(i)A balloon filled with hydrogen gas floats in air.
(ii) A ship made of steel float in water.
(d) (i) What are fats?
(ii) Slate two differences between fats and oils.
(e)State two ways of ensuring that information store on a diskette is not lost
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2022 WASSCE Trial Questions Solutions for Integrated Science
(a)(i). Precautions to be taken when stocking ponds with fingerlings
– Starve fingerlings for 24 hours before transportation
– Ensure that water in which fingerlings were before transferring into the pond is of the same temperature as that of the pond
– Stock ponds with right number offish to avoid overcrowding
– Do not throw fish into the pond, but should be allowed to swim out of their container into the pond.
(ii). Precautions during feeding
– Avoid overfeeding fish
– Feed with high protein content should be given to the fingerlings
– Accumulation of uneaten food in the pond must be prevented.
(b)(i). Functions of oestrogen
Responsible for the development of female secondary sexual characteristics
(ii). Functions of testosterone
It is responsible for the development of the male secondary sexual characteristics
(iii). Functions of Progesterone
It inhibits ovulation
Makes the uterus very muscular
Sustain pregnancy
Regulates menstrual cycle
(iv) Function of prolactin
It produces and releases breast milk
(c) (i) Why a balloon filled with hydrogen gas floats in the air
The average density of the balloon containing hydrogen gas is less than the density of air. The weight of air that will be displaced by the balloon with hydrogen gas is greater than that of the balloon. The balloon is acted upon by a resultant upward force equal to the difference between the balloon and the weight of air.
(ii) Why steel ship floats on water
The ship floats because it is hollow, hence its average density is less than that of water. As a result, it displaces water equal to its weight.
(d) (i). Fats – are solid esters obtained from the reaction between glycerol and long-chain carboxylic acid.
Read: 2022 WASSCE Timetable for Ghana: 5 Facts for all School Candidates
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Source: Ghanaeducation.org
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