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The correct answer is A. air only
If the engine is not well maintained it will produce soot to the air, polluting the air.
sharon kalunda answered the question on July 30, 2019 at 12:38
- Which one of the following statements about energy is TRUE? Energy is (Solved)
Which one of the following statements about energy is TRUE? Energy is
A. A push or a pull
B. Ability to do work
C. Force that moves a load
D. Force overcome by a machine.
Date posted: July 30, 2019. Answers (1)
- Which one of the following pairs of materials are good conductors of electricity? (Solved)
Which one of the following pairs of materials are good conductors of electricity?
A. Steel wool and glass.
B. Coin and chalk.
C. Pins and dry wood.
D. Aluminium foil and razor blade.
Date posted: July 30, 2019. Answers (1)
- During a demonstration to investigate a certain property of matter, soil was put in a small container and then dipped in water in a basin....(Solved)
During a demonstration to investigate a certain property of matter, soil was put in a small container and then dipped in water in a basin. This was to show the presence of
A. Air in water
B. Water in soil
C. Minerals in soil
D. Air in soil.
Date posted: July 30, 2019. Answers (1)
- Which one of the following pairs of objects will float on water? (Solved)
Which one of the following pairs of objects will float on water?
A. Coin and candle wax.
B. Bottle opener and needle.
C. Biro pen casing and rubber band.
D. Nail and bottle top.
Date posted: July 30, 2019. Answers (1)
- In which one of the following does the load move through the same distance as the effort when in use? (Solved)
In which one of the following does the load move through the same distance as the effort when in use?
A. Crowbar.
B. Flag post.
C. Spade.
D. Claw hammer.
Date posted: July 30, 2019. Answers (1)
- Birds that have short, straight and thick beaks are (Solved)
Birds that have short, straight and thick beaks are
A. Filter feeders
B. Flesh eaters
C. Nectar feeders
D. Grain eaters.
Date posted: July 30, 2019. Answers (1)
- The diagram below represents a weather chart prepared by pupils.
Which one of the following statements is Correct about the weather chart?(Solved)
The diagram below represents a weather chart prepared by pupils.
Which one of the following statements is Correct about the weather chart?
A. Whenever it was sunny it was also calm at the same time.
B. It only rained after calm conditions.
C. Whenever it was rainy it was also windy at the same time.
D. It rained only in the afternoons.
Date posted: July 30, 2019. Answers (1)
- Which one of the following groups of planets are in the correct order in terms of distance from the sun?(Solved)
Which one of the following groups of planets are in the correct order in terms of distance from the sun? A. Venus, Mars, Earth.
B. Earth, Saturn. Jupiter.
C. Jupiter, Saturn, Uranus.
D. Mars, Neptune. Uranus.
Date posted: July 30, 2019. Answers (1)
- When constructing a wind vane the(Solved)
When constructing a wind vane the
A. Pointer should be fixed on a short stand
B. Pointer should be firmly held to the stand
C. Pointer should be made of cardboard
D. Tail of the pointer should be larger than arrow head.
Date posted: July 30, 2019. Answers (1)
- In which one of the following is water used sparingly? (Solved)
In which one of the following is water used sparingly?
A. Using domestic waste water to clean toilets.
B. Turning off water taps after use.
C. Recycling waste water from factories
D. Using harvested rain water for animals to drink.
Date posted: July 30, 2019. Answers (1)
- In which one of the following activities is water used for recreation? (Solved)
In which one of the following activities is water used for recreation?
A. Watering plants.
B. Cooking.
C. Washing clothes.
D. Swimming.
Date posted: July 30, 2019. Answers (1)
- Which one of the following statements about reproduction in human beings is Correct? (Solved)
Which one of the following statements about reproduction in human beings is Correct?
A. Fertilization takes place in the uterus.
B. Ovulation always takes place twice in month.
C. Uterine wall contracts during birth.
D. The embryo develops into a zygote.
Date posted: July 30, 2019. Answers (1)
- Which one of the following consists only of parts of the human body where digestion takes place? (Solved)
Which one of the following consists only of parts of the human body where digestion takes place?
A. Mouth and stomach.
B. Large intestines and mouth.
C. Liver and stomach.
D. Large intestines and liver.
Date posted: July 30, 2019. Answers (1)
- Which one of the following statements describe a human canine tooth?(Solved)
Which one of the following statements describe a human canine tooth?
A. Chisel shaped with one root.
B. Rough surface with two roots.
C. Rough surface with three roots.
D. Pointed tip with one root.
Date posted: July 30, 2019. Answers (1)
- Which one of the following statements is NOT TRUE about friction? Friction is a force that (Solved)
Which one of the following statements is NOT TRUE about friction? Friction is a force that
A. Makes work difficult
B. Is reduced by treading tyres
C. Can be used to produce fire
D. Affect the speed of moving objects.
Date posted: July 30, 2019. Answers (1)
- In a certain investigation pupils heated different materials and recorded their findings.
Which one of the following correctly shows the pupils’ findings? (Solved)
In a certain investigation pupils heated different materials and recorded their findings.
Which one of the following correctly shows the pupils’ findings?
Materials that felt hot quickly-------------------------- Materials that did not feel hot quickly A. Rubber----------------------------------------------------- Iron.
B. Copper ----------------------------------------------------Aluminium.
C. Plastic --------------------------------------------------Glass.
D. Steel----------------------------------------------------- Wood.
Date posted: July 30, 2019. Answers (1)
- To save a person who has touched an exposed electric wire, one should(Solved)
To save a person who has touched an exposed electric wire, one should
A. Push the person away using dry wood
B. Pull the person from the wire
C. Pour cold water on the person
D. Shake the person vigorously.
Date posted: July 30, 2019. Answers (1)
- The diagram below represents a set-up that was used to demonstrate a certain aspect of heat.
The aspect demonstrated was (Solved)
The diagram below represents a set-up that was used to demonstrate a certain aspect of heat.
The aspect demonstrated was
A. Conduction in different solids
B. Convection in water
C. Conduction in water
D. Expansion in different solids.
Date posted: July 30, 2019. Answers (1)
- The diagram below represents a thermometer used to measure temperature of a certain liquid.
From the thermometer, the temperature of the liquid is(Solved)
The diagram below represents a thermometer used to measure temperature of a certain liquid.
From the thermometer, the temperature of the liquid is
A. 30°C
B. 27°C
C. 20°C
D. 10°C.
Date posted: July 30, 2019. Answers (1)
- Which one of the following diagrams represents what is observed when water is poured into a tin can with holes of the same size at...(Solved)
Which one of the following diagrams represents what is observed when water is poured into a tin can with holes of the same size at different depths?
Date posted: July 30, 2019. Answers (1)