KCPE PAST PAPERS 2007: SCIENCE QUESTIONS AND ANSWERS [QNS 26-50]

​KCPE PAST PAPERS 2007: SCIENCE QUESTIONS AND ANSWERS [QNS 26-50]

26.

Which one of the following pairs of processes ia as a result of increase in temperature?

• A. Melting and evaporation
• B. Condensation and freezing
• C. Condensation and evaporation
• D. Melting and freezing

27.

The diagram below show a set up that was used to demonstrate a certain property of matter.

The coloured water rises up the straw because

• A. Liquids expand when heated
• B. Liquids occupy space
• C. Air occupies space
• D. Air expands when heated

28.

A sufuria made up of steel weighing 1000g floats on water while a nail made of iron weighing 50g sinks.

This is because of difference in:

• A. Type of material
• B. Shape
• C. Volume
• D. Mass

29.

Which of the following material will NOT be required in an experiment to show that pressure in a liquid increase with depth?

• A. Tin can
• B. Water
• C. Nail
• D. Collecting jar

30.

The diagram below represents a circuit that can be used to make a temporary magnet.

The energy transformation that occurs at the section marked P is 

• A. Electrical____ magnetic
• B. Chemical ____ electrical
• C. Heat _____ electricity
• D. Chemical ____ magnetic

31.

The following are forms of energy

• i. Heat
• ii. Electricity 
• iii. Light
• iv. Sound

The two forms of energy that DO NOT require a medium for transmission are 

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

32.

The following practices help to conserve energy:

• ​i. Using improved firewood jikos
• ii. Switching off light that use hydro-electric power when not needed
• iii. Using public transport whenever possible 
• iv. Using biogas for cooking

Which Two practice conserve non- renewable source of energy?

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

33.

Which of the following is a recommended practice to avoid being struck by lighting?

• A. Sheltering under tree
• B. Using an umbrella when in an open field
• C. Sheltering while leaning on a wall
• D. Wearing rubber shoes with thick soles

34.

Which one of the following group consists of only foodstuff that are used for body buiding and repair?

• A. Rice, orange, meat
• B. Wheat, fish, maize
• C. Beans, potatoes, groundnuts
• D. Eggs, peas, milk

35.

The function of fibre in the human diet is to

• A. Provide the body with nutrients
• B. Transport digested food
• C. Prevent constipation
• D. Help in digestion of food

36.

Which one of following statements is NOT TRUE about the force that opposes movement the force

• A. Can be reduced by streamlining
• B. Makes the load heavier
• C. Increase effort required to move the load
• D. Produce heat

37.

A farmer noticed small and shallow channels forming in the soil in the garden due to running water. This type of soil erosion is called

• A. Splash
• B. Rill
• C. Sheet
• D. Gulley

38.

Which one of the following plants is a cereal?

• A. Millet
• B. Coffee
• C. Sunflower
• D. Peas

39.

Which one of the following consists of a pair plants that CANNOT make their own food?

• A. Fern and pine 
• B. Toadstool and moss
• C. Puffball and mould
• D. Cedar and yeast

40.

Which one of the following pairs of parasites can be controlled by spraying?

• A. Ticks and fleas
• B. Liver flukes and tsetse flies
• C. Fleas and liver flukes
• D. Ticks and tapeworms

41.

Which one of the following sources of electricity pollutes the environment?

• A. Geothermal
• B. Wind-driven generators
• C. Hydro-electric generators
• D. Petrol-driven generators

42.

Which one of the following is a natural way of lighting a house ? using a

• A. Candle
• B. Torch
• C. Hurricane lamp
• D. Transparent roof

43.

Which one of the following components is found in all environments?

• A. Plants
• B. Soil
• C. Air
• D. Water

44.

Which one of the following groups of methods can be used to separate solid mixtures only?

• A. Sieving, picking, winnowing
• B. Picking, use of magnet, decanting
• C. Winnowing, sieving, filtration
• D. Use of magnet, filtration
• E. Use of magnet, filtration, decanting

45.

Which one of the following DOES NOT function the same way as a bicycle dynamo when used to produce electricity?

• A. Hydro-electric generator
• B. Car battery
• C. Diesel generator
• D. Wind driven turbines

46.

The diagram below represent a simple machine.

Which of the position labelled P,Q and R would represent the load, effort and function when the machine is in use?
                  Load      effort        fulcrum

• A.       P              Q               R
• B.      R            P                 Q
• C.      Q             P               R
• D.      R             Q             P

47.

The diagram below represents a block of wood being pushed along pushed a surface towards point X

Which one of the arrows represents the direction of the force of friction?

• A. J
• B. K
• C. L
• D. M

48.

Which one of the following consists of only material that are ALL non-magnetic?

​A. Aluminium foil, a shilling coin
B. Iron nails, staple pins
C. Metal scissors, steel wool
D. Piece of glass, sewing needle

49.

The reason why coloured water is used in the construction of a liquid thermometer is to

• A. Make it visible
• B. Make it expand faster
• C. Make it absorb more heat
• D. Increase its density

50.

Which one of the following is the largest planet?

• A. Mercury
• B. Saturn
• C. Jupiter
• D. Earth

ANSWERS

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