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*INTER SCIENCE TRIAL 2022*
*Questions*
a) State two precautions each to be taken when carrying out the following practices in fish farming:
(i) stocking of 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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*Answers*
(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 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 over feeding 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 tetosterone
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 ofprolactin
It produces and releases breast milk
(c) (i) Why ballon filled with hydrogen gas floats in air
The average density of the balloon containing hydrogen gas is less than the density of air. The weight of air which 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.
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So take good use of this opportunity after Middle of this month, prices increases exorbitantly to 400ghc
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Core mathematics trials
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1) (a) Calculate the compound interest and the final amount on
N40000 for 2 yrs at 5% per annum.
(c) Factorise
(i) 4ms – 15mt – 6mt + 10ns
(ii) Mx + ny – nx – my
2) (a) convert (i) 214 to base 5 (ii) (10001 2 ) 2 to base 10
(b) If 40 students can consume 100kg bag of beans in 5
weeks. How long will the bag of beans last for (a) 16 students
(b) 60 students
(c) Evaluate 111111 2 11 2 and leave your answer in base two
3. (a) The probability that a malaria patient (M) survives when administered with a newly discovered drug is 0.27 and the probability that a thyphoid patient (T) survives when injected with another newly discovered drug is 0.85.
What is the probability that;
i. either of the two patients survives?
ii. of two patients survive?
iii. at least one of the two patients survive?
(b) Give your answers correct to 2 significant figures.
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✍️MY VIP IS OPEN FOR INTERESTED CANDIDATES,TEACHERS AND PARENTS ❗️❗️
✍️I PROVIDE DAILY QUESTIONS AND ANSWERS TO PREPARE STUDENTS WELL BEFORE THE EXAMS
✍️AFTER JOINING THE VIP
(ALL PAPERS ARE FREE )
ALL LIKELY QUESTIONS ARE POSTED THERE✍️✍️✍️
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To All Candidates:
Don’t be switching Class at this point in time.
Solve every past questions and Exercises your Form masters will usher you to.
It keeps you prepared and Focused. !
Experienced knows the Best.
Let your books be your friend sometimes. Because Failing Wassce or any Exam is very Painful. ℹ️
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Integrated science
Trials 👇👇👇👇
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1. a) i) Explain briefly the term photosynthesis.
ii) How does the root of a plant obtain the energy necessary for its physiological functions?
b) i) Name the chemical from which large cale chlorine can be manufactured.
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ii) State the two by-products in the industrial production of chlorine.
iii) Mention two large scale uses of each of the by-products in (b)(ii) above
c)i) What is a satellite?
ii) State three uses of a satellite.
d) Name the instruments you will use to measure each of the following:
i) thickness ofa sheet of paper
ii) diameter of a ball bearing,
iii) length ofa match box.
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