Get premium membership and access questions with answers, video lessons as well as revision papers.
The correct answer is B. organic matter in soil
Organic matter in the soil produces soot/smoke when heated.
sharon kalunda answered the question on July 30, 2019 at 12:59
- Which one of the following are both reasons for lighting a house? (Solved)
Which one of the following are both reasons for lighting a house?
A. Safety and discouraging pests.
B. Drying and discouraging pests.
C. Warming and seeing clearly.
D. Safety and warming.
Date posted: July 30, 2019. Answers (1)
- Which one of the following is a source of electricity? (Solved)
Which one of the following is a source of electricity?
A. Electromagnet.
B. Bulb.
C. Dynamo.
D. Dam.
Date posted: July 30, 2019. Answers (1)
- In which one of the following cases is friction a disadvantage? (Solved)
In which one of the following cases is friction a disadvantage?
A. Grinding maize.
B. Writing.
C. A bird flying.
D. Braking.
Date posted: July 30, 2019. Answers (1)
- Which one of the following groups consist only of external livestock parasites? (Solved)
Which one of the following groups consist only of external livestock parasites?
A. Fleas, mites, ticks.
B. Roundworms, lice. Mites.
C. Fleas, tapeworms. Lice.
D. Mites, roundworms, ticks.
Date posted: July 30, 2019. Answers (1)
- Which one of the following is an effect of soil pollution? (Solved)
Which one of the following is an effect of soil pollution?
A. Formation of acid rain.
B. Death of small animals.
C. Interferes with photosynthesis.
D. Causes respiratory diseases.
Date posted: July 30, 2019. Answers (1)
- Which one of the following is true about soil that has high water retention? It has(Solved)
Which one of the following is true about soil that has high water retention? It has
A. Large air spaces
B. Low capillarity
C. Fine texture
D. Large particles.
Date posted: July 30, 2019. Answers (1)
- The diagram below shows a set-up used by pupils to carry out an investigation.
The investigation was to(Solved)
The diagram below shows a set-up used by pupils to carry out an investigation.
The investigation was to
A. Show how the length of strings used affects balancing of different materials
B. Measure amount of force of different materials
C. Show how different materials move up and down
D. Compare the masses of different materials.
Date posted: July 30, 2019. Answers (1)
- The chart below shows some farm animals and their products. Which products are represented by E and F?(Solved)
The chart below shows some farm animals and their products. Which products are represented by E and F?
E---------------------------- F
A. Milk ------------------------Wool.
B. Wool------------------------ Mutton.
C. Beef------------------------ Mutton.
D. Milk------------------------- Beef.
Date posted: July 30, 2019. Answers (1)
- A flower which has long feathery stigma and loosely held anthers is also likely to(Solved)
A flower which has long feathery stigma and loosely held anthers is also likely to
A. Have brightly colored petals
B. Have sweet scent
C. Produce many pollen grains
D. Produce nectar.
Date posted: July 30, 2019. Answers (1)
- Driving a motor vehicle with a well maintained engine will mainly control pollution in (Solved)
Driving a motor vehicle with a well maintained engine will mainly control pollution in
A. Air only
B. Water only
C. Soil and air
D. Air and water.
Date posted: July 30, 2019. Answers (1)
- 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)