The correct answer is D. radiation only.
The transfer of heat through a vacuum in form of electromagnetic waves is called radiation.
sharon kalunda answered the question on July 29, 2019 at 14:12
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In a certain investigation pupils sat at different positions around a pupil who was ringing a bell. Which one of the following aspects of sound...
(Solved)
In a certain investigation pupils sat at different positions around a pupil who was ringing a bell. Which one of the following aspects of sound were the pupils investigating?
A. Special sounds.
B. Loud and soft sound.
C. Noise pollution.
D. Direction of sound.
Date posted:
July 29, 2019
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Answers (1)
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The diagram below represents a set up that can be used to investigate good and poor conductors of electricity. Which one of the following materials,...
(Solved)
The diagram below represents a set up that can be used to investigate good and poor conductors of electricity. Which one of the following materials, when used to connect wires at point S would make the bulb not light?
A. Pencil
B. Aluminium foil.
C. Steel wool
D. Rubber band
Date posted:
July 29, 2019
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Answers (1)
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Which one of the following is not a component of soil?
(Solved)
Which one of the following is not a component of soil?
A. Rock particles.
B. Water.
C. Plant.
D. Air.
Date posted:
July 29, 2019
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Answers (1)
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Which one of the following groups consists only of gases that comprise 0.03, 0.97 and 21 percentage in air respectively?
(Solved)
Which one of the following groups consists only of gases that comprise 0.03, 0.97 and 21 percent in air respectively?
A. Inert gases, oxygen and nitrogen.
B. Carbon dioxide, inert gases and oxygen.
C. Inert gases, carbon dioxide and nitrogen.
D. Carbon dioxide, oxygen and nitrogen.
Date posted:
July 29, 2019
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Answers (1)
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Which one of the following groups only consists of materials that are non- magnetic?
(Solved)
Which one of the following groups only consists of materials that are non- magnetic?
A. Piece of glass, silver coin, cello tape.
B. Nail, steel wool, spoon.
C. Scissors, razor blade, piece of glass.
D. Staple pins, sowing needle, aluminium.
Date posted:
July 29, 2019
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Answers (1)
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Pupils went for a nature walk and observed a plant with yellow fruits and thorns on the stem. The plant observed was likely to be
(Solved)
Pupils went for a nature walk and observed a plant with yellow fruits and thorns on the stem. The plant observed was likely to be
A. Mexican marigold
B. pig weed
C. Black jack
D. Sodom apple.
Date posted:
July 29, 2019
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Answers (1)
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When pupils heated some garden soil, smoke was produced. The observation made indicated the presence of
(Solved)
When pupils heated some garden soil, smoke was produced. The observation made indicated the presence of
A. organic matter
B. air
C. mineral particles
D. water.
Date posted:
July 29, 2019
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Answers (1)
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Which one of the following soil conservation measures is least suitable on a large piece of land?
(Solved)
Which one of the following soil conservation measures is least suitable on a large piece of land?
A. Terracing.
B. Mulching.
C. Tree planting.
D. Contour farming.
Date posted:
July 29, 2019
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Answers (1)
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Which one of the following nutrients is required for the formation of blood in expectant mothers?
(Solved)
Which one of the following nutrients is required for the formation of blood in expectant mothers?
A. Vitamin D.
B. Calcium.
C. Phosphorus.
D. Iron.
Date posted:
July 29, 2019
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Answers (1)
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Which one of the following is a safety measure against lightning when it is raining?
(Solved)
Which one of the following is a safety measure against lightning when it is raining?
A. Leaning against walls.
B. Walking on open areas.
C. Wearing rubber shoes.
D. Using an umbrella.
Date posted:
July 29, 2019
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Answers (1)
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Which one of the following is a transparent material?
(Solved)
Which one of the following is a transparent material?
A. Kerosene.
B. Mirror.
C. Frosted glass.
D. White paper.
Date posted:
July 29, 2019
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Answers (1)
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Heat transfer in liquids and gases mainly takes place through
(Solved)
Heat transfer in liquids and gases mainly takes place through
A. radiation
B. convection and conduction
C. convection
D. conduction and radiation.
Date posted:
July 29, 2019
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Answers (1)
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In an investigation on factors affecting sinking and floating pupils carried out the following activities: (i) Placed a bottle top in water.
(ii) Made the...
(Solved)
In an investigation on factors affecting sinking and floating pupils carried out the following activities: (i) Placed a bottle top in water.
(ii) Made the same bottle top into a ball and placed it on water.
Which one of the following factors were the pupils investigating?
A. Size.
B. Shape.
C. Type of material.
D. Mass.
Date posted:
July 29, 2019
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Answers (1)
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In which one of the following is friction an advantage?
(Solved)
In which one of the following is friction an advantage?
A. Skating on ice.
B. Swimming in water.
C. Production of heat in moving parts.
D. Braking of a bicycle on a road.
Date posted:
July 29, 2019
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Answers (1)
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Which of the following pairs of machines consists only of inclined planes
(Solved)
Which of the following pairs of machines consists only of inclined planes
A. Ladder and staircase.
B. Staircase and wheelbarrow.
C. Claw hammer and ladder.
D. Spade and craw bar.
Date posted:
July 29, 2019
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Answers (1)
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The method of grazing that would require the largest piece of land to practice is
(Solved)
The method of grazing that would require the largest piece of land to practice is
A. herding
B. stall feeding
C. tethering
D. paddocking.
Date posted:
July 29, 2019
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Answers (1)
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Which one of the following pairs consists only of farm animals that produce mutton?
(Solved)
Which one of the following pairs consists only of farm animals that produce mutton?
A. Cow and goat.
B. Goat and sheep.
C. Cow and sheep.
D. Sheep and pig.
Date posted:
July 29, 2019
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Answers (1)
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The chart below shows a simple classification of plants.
Which of the following pairs represents Y and Z
(Solved)
The chart below shows a simple classification of plants.
Which of the following pairs represents Y and Z
Y------------- Z
A Carrots --------Sisal
B Kale ----------Onion
C Moss ----------Cypress
D Sugarcane------- Fern
Date posted:
July 29, 2019
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Answers (1)
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Which one of the following pairs consists only of plants that directly feed on insects?
(Solved)
Which one of the following pairs consists only of plants that directly feed on insects?
A. Pitcher plant and sundew.
B. Mushroom and butter wort.
C. Sunflower and pitcher
D. Sundew and toadstool.
Date posted:
July 29, 2019
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Answers (1)
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Pupils constructed a weather instrument Inner tube
The mistake made in the construction was
(Solved)
Pupils constructed a weather instrument Inner tube
The mistake made in the construction was
A. Using coloured water
B. Placement of the scale
C. Using a narrow tube
D. Closing the cork tightly.
Date posted:
July 29, 2019
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Answers (1)