KCPE PAST PAPERS 2006: SCIENCE QUESTIONS AND ANSWERS [25-50]

KCPE PAST PAPERS 2006: SCIENCE QUESTIONS AND ANSWERS [25-50]

26.

A pupil investigating a certain aspect of pressure in a liquid used a setup shown in the diagram below

What conclusion could the pupil make from the investigation?

• A. Air exerts pressure on the surface of a liquid
• B. Pressure in a liquid increases with depth
• C. Pressure in a liquid is equal at the same depth
• D. Pressure in a liquid is exerted on the sides only

27.

The temperature at which a substance freezes is the same temperature at which the substance

• A. Condenses
• B. Evaporates
• C. Boils
• D. Melts

28.

Which one of the following consists of only substances that have no definite shape but have definite volume?

• A. Stone, kerosene, carbon dioxide
• B. Oil, toothpaste, glue
• C. Clay, flour, cement
• D. Nitrogen, oxygen, water vapour

29.

The diagram below represents a setup that can be used to demonstrate heat transfer in air

​For the demonstration to work a burning candle must be placed at

• A. P
• B. Q
• C. R
• D. S

30.

The percentage of the component of air that is fixed by bacteria in root nodules to make nutrients for the plant is

• A. 0.03%
• B. 0.97%
• C. 21%
• D. 78%

31.

Which one of the following is the last step when separating a mixture of sand and salt?

• A. Dissolving
• B. Filtering
• C. Evaporating
• D. Decanting

32.

The diagram below shows a stone being thrown using a catapult

The form of energy in the rubber band before the stone is released is

• A. Kinetic
• B. Potential
• C. Chemical
• D. Sound

33.

Which one of the following is CORRECT about a solar heater? A solar heater changes

• A. Heat energy to electrical energy
• B. Light energy to electrical energy
• C. Chemical energy to heat energy
• D. Light energy to heat energy

34.

Tall buildings are fitted with sharp pointed metal rods at their tops and connected to the ground. The rods are for

• A. Protecting the buildings against lightning
• B. Protecting electricity users from being electrocuted
• C. Fixing aerials for radios and televisions
• D. Allowing expansion of walls during hot weather

35.

Which one of the following is TRUE about the rainbow? It forms

• A. Before heavy rainfall
• B. When it rains while the sun is shining
• C. When the sky is covered with thick clouds
• D. When it rains in the afternoon

36.

Which one of the following energy transformations take place when a radio that uses cells is operating?

37.

Which one of the following sources of energy DOES NOT contain chemical energy?

• A. Car battery
• B. Bicycle dynamo
• C. Food
• D. Firewood

38.

Heat reaches the feet of a person seated by the side of a fire by

• A. Conduction and convection
• B. Radiation only
• C. Convection only
• D. Radiation and convection

39.

Which one of the following DOES NOT pollute the air?

• A. Exhaust gases from aeroplanes
• B. Smoke from burning charcoal
• C. Smoke from burning domestic wastes
• D. Gases from decaying animals

40.

The main reason why it is advisable to spray crops in the direction of wind is to avoid

• A. The chemicals getting into contact with the skin 
• B. Wastage of chemicals
• C. Polluting the air
• D. Inhaling the chemicals

41.

The following signs and symptoms were observed in a certain child

• (i) Thin and weak
• (ii) Wrinkled face
• (iii) Pot bellied
• (iv) Hungry and crying a lot

The child was most likely suffering from

• A. Anaemia
• B. Rickets
• C. Kwashiokor
• D. Marasmus

42.

Which one of the following groups consists only of foodstuffs that protect the body against diseases?

• A. Lemon, cabbage, carrot
• B. Beans, groundnuts, fish
• C. Maize, potatoes, rice
• D. Meat, oranges, spinach

43.

The purpose of salt in food preservation is to

• ​A. Remove water
• B. Add flavour
• C. Remove air
• D. Lower the temperature

44.

The most likely reason why some expectant mothers crave for soil is to

• A. Increase breast milk production after delivery
• B. Increase appetite
• C. Help in digestion of food
• D. Provide sufficient mineral nutrients

45.

Which one of the following levers when in use has the position of the effort between the load and the fulcrum?

• A. Spade
• B. Wheelbarrow
• C. Claw hammer
• D. Crowbar

46.

A single fixed pulley

• A. Changes direction of force
• B. Increases effort distance
• C. Reduces effort required
• D. Reduces load distance

47.

The diagram below represents a tyre of a vehicle

The purpose of treads in the vehicle tyre is to

• A. Make them last longer
• B. Increase grip on the road
• C. Reduce surface area
• D. Make them lighter

48.

The following activities are carried out when making a beam balance but not in the correct order

• (i) Suspend the arm to find balance point and mark
• (ii) Make a base, a stand and the arm
• (iii) Fix the stand and the arm to the base
• (iv) Suspend tins on both sides of the arm

Which one of the following is the CORRECT order in which the activities are carried out?

• A. (iii) (i) (ii) (iv)
• B. (ii) (i) (iii) (iv)
• C. (iii) (ii) (iv) (i)
• D. (ii) (i) (iv) (iii)

49.

Which one of the following statements is CORRECT about a stone thrown a few metres directly upwards by a passenger in a moving lorry? The stone will fall

• A. In front of the person
• B. Behind the person
• C. On the person
• D. Behind the lorry

50.

The diagram below represents a certain weed

​The weed is

• A. Pigweed
• B. Mexican marigold
• C. Black jack
• D. oxalis

Also Read

• KCPE 2006 PAST PAPERS, ANSWERS AND REPORTS
• FREE 2006 KCPE ANSWERS - KCPE PAST PAPERS
• FREE KCPE PAST PAPERS: KISWAHILI 2018 ANSWERS
• KCPE 2007 PAST PAPERS, ANSWERS AND REPORTS

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