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PLE Science 2017.
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SECTION A: 40 MARKS
Question 1 to 40 carry one mark each
1.State the injury caused by steam to a human body.
2.What type of electricity is lightning?
3.Give any one way in which termites benefit from soil.
4.State one effect of gonorrhoea on the female reproductive system.
5.What is the importance of gap filling in crop growing?
6.What type of reflection is shown above?
7.Why are the rays reflected as shown in the diagram?
8.State any one way in which alcoholism affects a family
9.State any one reason why animals make sound .
10.Name the process through which water turns into ice.
11.In which one way does tooth paste promote oral health?
12.State any one physical change that takes place during the process of distillation of alcohol.
13.What is the importance of the rings of cartilage of the trachea in the respiratory system?
14.Why does a nail sink in water?
15.Give any one danger of wetland drainage to water animals.
16.State any one principle of Primary Health Care.
17.Why are laying boxes put in dark corners of a poultry house?
18.Apart from causing diseases, give one other way in which fungi are harmful to people.
19.How is a reflected sound helpful to sailors?
20.Give one way in which molluscs are different from other invertebrates
21.Give any one mineral deficiency disease in humans.
22.Name the type of bees which develops from unfertilized eggs.
23.State any one way in which the spread of germs by houseflies can be controlled.
24.What type of germination is shown in the diagram above?
25.To which group of flowering plants does the germinating seed belong.
26.State any one way in which saliva is useful in the process of digestion.
27.Name the vaccine which is given to prevent three childhood immunisable diseases.
28.Give one reason why less effort is applied to move a load using first class levers.
Which property of magnets is shown in the diagram?
30.State any one sign of disease on plant leaves.
31.Name the organ which regulates the human body temperature.
32. State any one way in which animals can be used as energy resources.
33.Which method of harvesting trees allows new shoots to grow from the stump?
34.Give any one way of controlling the bad smell in an ordinary pit latrine.
Why does the object seem to appear at point A yet it is at point B?
36.State any one sign of the snuffle disease in rabbits.
37.Which property of air makes the lungs expand when we breathe in?
38. Apart from curing diseases, give one other characteristic of essential drugs.
39.Why is biogas regarded as an environmentally friendly source of energy?
40.State any one characteristic of seeds dispersed by wind.
SECTION B: 60 MARKS
Questions 41 to 55 carry four marks each
41a.Give any two signs which show that a baby is dehydrated.
b.State any two pieces of advice you would give to a mother whose baby is dehydrated.
42a.Use the living things listed below to complete the given food
b. Which one of the living things in the food chain above is a producer?
c.What is the source of energy for the producer in the food chain above?
a.Name the organ marked with letter X.
b. Which blood vessel is marked with letter W?
c. State the similarity between blood vessel Y and blood vessel Z.
d. Why does blood vessel W bring blood back to the heart?
44a.Write down any two causes of soil erosion.
b. Which agent of soil erosion causes gullies?
c. How does soil erosion lead to soil infertility?
a. Which home had all the sanitation items?
b. Identify the sanitation item missing in most of the homes surveyed.
c. Name any one disease that is likely to attack homes A, C, D and E.
d. Give any one other sanitation item which could be added in the health survey.
46a. What causes fainting?
b. State any two conditions that can lead to fainting.
c.Why are the legs of a person who has fainted raised higher than the head when giving First Aid?
47 Use the list of crops given below to answer the questions that follow.
conifer, coffee, cassava,groundnut
a. Which crop on the list is propagated by use of stem cutting?
b(i). Identify any one crop on the list which is:
c. Give any one way in which a conifer is different from all the other crops on the list.
a. What type of simple machine is the man using?
b. Give any two examples of the type of simple machine you have named in (a) above.
c. How can the man improve on the simple machine above in order to make his work easier?
49a. Which breed of cattle is obtained by mating a pure local breed and an exotic breed?
b. Give any two reasons why some farmers prefer keeping local breeds of cattle to exotic breeds.
c. State any one characteristic of dairy cattle.
50a. Name any two bones that form the joint at the knee of the human body.
b. What name is given to the joint at the knee?
c. In which one way is friction reduced at a joint?
52a. Apart from rainfall, give one other element of weather necessary for plant growth .
b. In which two ways is rainfall important for plant growth?
c. State any one disadvantage of too much rainfall to plants.
a. Name the group of arthropods to which animals X and Y belong.
b. Give any one reason why animal y does not belong to the same group as animal Z
c. How are animals X, Y and Z similar in the way they reproduce?
54a. Apart from raising the temperature of substances, give any two effects of heat on matter.
b. State any two ways in which heat transfer by conduction is important to people.
a. Name the method shown above.
b. Apart from the coarse stones, name any two other local materials which are placed in container T.
c. Why should the clean water obtained in container S be boiled before drinking?
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