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The correct answer is C. W can form scales in kettles.
Soft water does not form scales on kettles.
sharon kalunda answered the question on July 30, 2019 at 09:24
- Which of the following practices LEAST pollutes the soil? (Solved)
Which of the following practices LEAST pollutes the soil?
A. Spraying crops to kill pests.
B. Burning plant wastes in the farm.
C. Disposing of animal wastes in the farm.
D. Burying plastics in the soil.
Date posted: July 30, 2019. Answers (1)
- The diagram below represents a simple electric circuit.
Which of the following energy transformations would take place when the switch is on?(Solved)
The diagram below represents a simple electric circuit.
Which of the following energy transformations would take place when the switch is on?
A. Chemical—> electrical—>heat—> light.
B. Electrical—> chemical-alight——> heat.
C. Chemical—> electrical—> light—> heat.
D. Electrical—> light—>chemical—> heat.
Date posted: July 30, 2019. Answers (1)
- For two masses X and Y. the mass of X was twice that of Y. The diagram below shows a set-up that was used to...(Solved)
For two masses X and Y. the mass of X was twice that of Y. The diagram below shows a set-up that was used to investigate how the two masses balance at positions Q. R. S and T on a seesaw.
Which of the following was a correct observation about the investigation?
Position of X --------------------Position of ---------------------------------Y Observation made
A. Q----------------------------------- T----------------------------------------- End P moved down
B. R -----------------------------------T----------------------------------------- End V moved up.
C. Q----------------------------------- S---------------------------------------- Seesaw balanced.
D. R----------------------------------- S------------------------------------------ End V moved down
Date posted: July 30, 2019. Answers (1)
- In which of the following are characteristics of cumulus and nimbus clouds CORRECTLY placed?(Solved)
In which of the following are characteristics of cumulus and nimbus clouds CORRECTLY placed?
Cumulus--------------------------- Nimbus
A. Dark grey in color---------------- Appear like bundles of cotton.
B. Mountainous in shape ---------------white in color.
C. White in color --------------------Mountainous in shape.
D. Rain bearing------------------------ Dark grey in color.
Date posted: July 30, 2019. Answers (1)
- Which of the following is a preventive measure against the spread of tuberculosis? (Solved)
Which of the following is a preventive measure against the spread of tuberculosis?
A. Clearing bushes around houses.
B. Boiling drinking water.
C. Proper disposal of human waste.
D. Living in a well-ventilated house.
Date posted: July 30, 2019. Answers (1)
- A person in the incubation period of HIV infection will show (Solved)
A person in the incubation period of HIV infection will show
A. Signs and symptoms but test negative
B. No signs and no symptoms but test positive
C. No signs, no symptoms and test negative
D. Signs, symptoms and test positive.
Date posted: July 30, 2019. Answers (1)
- The MAIN reason why mothers are encouraged to breast feed their infants is because breast milk (Solved)
The MAIN reason why mothers are encouraged to breast feed their infants is because breast milk
A. Boosts immunity of the infant
B. Is free from disease causing germs
C. Is at the right temperature for infants
D. Is easily digested by infants.
Date posted: July 30, 2019. Answers (1)
- The diagram below represents a model of the solar system prepared by class six pupils.
The mistake made in the model was(Solved)
The diagram below represents a model of the solar system prepared by class six pupils.
The mistake made in the model was
A. Using threads instead of wires
B. Placing a ball of clay next to the one representing the sun
C. Placing two balls of clay on one thread
D. Using balls of clay of different sizes. Each planet should be In its own thread.
Date posted: July 30, 2019. Answers (1)
- The diagram below shows an improvised rain gauge.
The collecting bottle should (Solved)
The diagram below shows an improvised rain gauge.
The collecting bottle should
A. Have the funnel sealed to its mouth
B. Be wide to collect enough water
C. Be placed above the ground
D. Be transparent for easy reading.
Date posted: July 30, 2019. Answers (1)
- A hilly area with deep channels is LIKELY to be experiencing (Solved)
A hilly area with deep channels is LIKELY to be experiencing
A. Sheet erosion
B. Gulley erosion
C. Rill erosion
D. Splash erosion.
Date posted: July 30, 2019. Answers (1)
- Which of the following pairs consists of diseases caused by lack of minerals in the diet? (Solved)
Which of the following pairs consists of diseases caused by lack of minerals in the diet?
A. Anaemia and rickets.
B. Kwashiokor and anaemia.
C. Marasmus and Kwashiokor.
D. Rickets and marasmus.
Date posted: July 30, 2019. Answers (1)
- Which of the following is the MAIN reason why eating bread after expiry date is discouraged? The bread could have (Solved)
Which of the following is the MAIN reason why eating bread after expiry date is discouraged? The bread could have
A. Lost nutrients
B. A bad taste
C. Some micro-organisms
D. Changed its colour.
Date posted: July 30, 2019. Answers (1)
- Which of the following pairs of food is preserved by smoking, salting and drying? (Solved)
Which of the following pairs of food is preserved by smoking, salting and drying?
A. Meat and mushrooms.
B. Beans and fish.
C. Mushrooms and beans.
D. Meat and fish.
Date posted: July 30, 2019. Answers (1)
- Which of the following groups of sources of energy are renewable? (Solved)
Which of the following groups of sources of energy are renewable?
A. charcoal. kerosene. sawdust.
B. water. firewood. animal dung.
C. Diesel. wind, natural gas.
D. Biogas. petrol, coal.
Date posted: July 30, 2019. Answers (1)
- Which of the following practices will NOT result in a person getting an electric shock? (Solved)
Which of the following practices will NOT result in a person getting an electric shock?
A. Touching sockets with wet hands.
B. Putting pencils in sockets.
C. Overloading the sockets.
D. Putting iron nails in sockets.
Date posted: July 30, 2019. Answers (1)
- The reason why improved jikos have a clay lining is to (Solved)
The reason why improved jikos have a clay lining is to
A. Reduce the amount of heat loss
B. Reduce the space for charcoal
C. Make charcoal light faster
D. Make the jiko last longer.
Date posted: July 30, 2019. Answers (1)
- A card made in the shape of letter E and numbers 1, 2 and 3 written on it was placed in front of a mirror...(Solved)
A card made in the shape of letter E and numbers 1, 2 and 3 written on it was placed in front of a mirror as shown in the diagram.
Which one of the following is correctly represented?
Date posted: July 30, 2019. Answers (1)
- The diagram below represents a set-up in which a ruler is fixed to a desk and its free end pulled to positions L. M. and...(Solved)
The diagram below represents a set-up in which a ruler is fixed to a desk and its free end pulled to positions L. M. and N. At each position the free end is released to produce sound.
The set-up can be used to investigate
A. Special sounds
B. Loud and soft sound
C. Direction of sound
D. Noise pollution.
Date posted: July 30, 2019. Answers (1)
- The diagram below shows a set-up that can be used to investigate the effect of heat on matter.
The effect investigated is (Solved)
The diagram below shows a set-up that can be used to investigate the effect of heat on matter.
The effect investigated is
A. Gases change state when heated
B. Solids expand when heated
C. Gases expand when heated
D. Solids change state when heated.
Date posted: July 30, 2019. Answers (1)
- The following are activities carried out to investigate the effect of heat on a liquid.
(i) Placing the bottle on a source of heat.
(ii)...(Solved)
The following are activities carried out to investigate the effect of heat on a liquid.
(i) Placing the bottle on a source of heat.
(ii) Filling the bottle with coloured water.
(iii) Fixing a straw on the cork.
(iv) Closing the battle tightly with the cork.
Which one of the following is the CORRECT ORDER of the activities?
A. (ii), (iii), (iv), (i).
B. (iii), (iv),(ii), (i).
C. (ii).(i),(iii),(iv).
D. (iii). (ii), (i), (iv)
Date posted: July 30, 2019. Answers (1)