KNEC KCPE 2018 SCIENCE PAST PAPER AND ANSWERS- CONTINUED ...

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KNEC KCPE 2018 SCIENCE PAST PAPER AND ANSWERS - CONTINUED ...

Question 31.

​The following are some activities involving the use of simple machines: 
(i) A car moving on a road winding up a hill. 
(ii)A wheelbarrow in use. 
(iii)A person climbing up a staircase. 
(iv)Rolling an object down a hill, 
Which two activities involve the use of inclined planes? 
   A. (ii), (iv). 
   B. (ii), (iii). 
   C. (iii). 
   D. (i), (iv). 

answer

C

Question 32.

The diagram below represents a certain weather instrument. 

​The instrument can be used to show 
   A. direction of wind only. 
   B. speed and direction of wind. 
   C. speed of wind only. 
   D. direction and strength of wind. 

answer

D

Question 33.

Which one of the following need NOT to be considered when modelling the solar system using clay balls?
   A. Size of balls.
   B. Distance between balls
   C. Mass of balls.
   D. Number of balls. 

answer

C

Question 34.

​A meal made of irish potatoes, beans and rice should be made a balanced diet by 
   A. removing one energy giving food. 
   B. adding body building food. 
   C. adding water. 
   D. adding protective food. 

answer

D

Question 35.

A child with extreme loss of weight and a face that looks old will also have 
   A. protruding stomach. 
   B. swollen feet. 
   C. sores on the corners of mouth. 
   D. alert eyes. 

answer

D

Question 36.

​A disease characterised by discharge of grey-yellow pus and burning sensation during urination is 
   A. gonorrhoea. 
   B. syphilis. 
   C. chancroid. 
   D. cholera. 

answer

A

Question 37.

​Which one of the following myths and misconceptions about HI V/AIDS could highly increase the spread of the infection? 
   A. Fat people have no infection. 
   B. AIDS is a curse. 
   C. One can get AIDS by shaking hands. 
   D. AIDS is caused by witchcraft. 

answer

A

Question 38.

​The following are signs and symptoms of certain diseases: 
(i) fever. 
(ii) severe headache. 
(iii) blood in stool and urine. 
(iv) severe dehydration. 
(v) vomiting. 
Which two are for typhoid? 
   A. (i) and (ii). 
   B. (ii)and(iii. 
   C. (ii)and (iv). 
   D. (iv) and (v). 

answer

A

Question 39.

​In which one of the following practices is water recycled? 
   A. Water used for cleaning vegetables is used to water flowers. 
   B. Use of dams to collect water. 
   C. Use of drip irrigation in cultivation. 
   D. Use of treated industrial waste water. 

answer

D

Question 40.

​Which one of the following is the main reason why lactating mothers should be fed on a diet rich in iron? To
   A. replace blood lost during birth. 
   B. increase milk production. 
   C. boost the child’s immunity. 
   D. prevent anaemia in the body. 

answer

A

Question 41.

​Which one of the following is the best method of handling medicine bottles after use? 
   A. Recyc1ing. 
   B. Reusing. 
   C. Burying in a deep pit. 
   D. Burning them immediately. 

answer

C

Question 42.

​Which one of the following components of blood is attacked by HIV? 
   A. Red blood cells. 
   B. White blood cells. 
   C. Platelets. 
   D. Plasma.

answer

B

Question 43.

Bilharzia and malaria diseases can both be prevented by 
   A. wearing protective clothing. 
   B. clearing bushes. 
   C. pouring oil on stagnant water. 
   D. draining stagnant water. 

answer

D

Question 44.

​Which one of the following is the best preventive measure against sexually transmitted infections for adolescent children? 
   A. Abstain. 
   B. Seeking medical treatment. 
   C. Use of condoms. 
   D. Faithfulness. 

answer

A

Question 45.

​In investigating capillarity in soil, pupils LI were provided with water and different 
soils. Which two other materials are required? 
   A. Funnels and drinking straws. 
   B.Plastic bottles and funnels. 
   C. Cotton wool and drinking straws. 
   D. Plastic bottles and drinking straws. 

answer

C

Question 46.

​The rate at which water drains in the soil is mainly determined by 
    A. volume of the soil. 
    B. size of the soil particles. 
    C. humus content in the soil. 
    D. air content in the soil. 

answer

A

Question 47.

Which one of the following pairs consists only of harmful animals? 
   A. Dog and bee. 
   B.White ants and mole. 
   C. Snake and chameleon. 
   D. Dog and mole. 

answer

B

Question 48.

​Which one of the following animals moves by flying and hopping? 
   A. Cockroach. 
   B. Flea. 
   C. Mite. 
   D. Cricket.

answer

C

Question 49.

​The ability to do work is 
   A. energy. 
   B. force. 
   C. effort. 
   D. motion.

answer

   A. energy. 
​According to https://en.wikipedia.org/wiki/Energy
'Energy. ... In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object.'

Question 50.

​The diagram below represents a lever in use. 

​Which one of the following works in the same way as the lever illustrated above? 
   A.Wheelbarrow. 
   B.Spade. 
   C. Claw hammer. 
   D. Ladder. 

answer

   A.Wheelbarrow. 
​In both exist effort, load and fulcrum

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