Heat Transfer
25 Grade 5 Integrated Science questions on Heat Transfer, with worked marking schemes. 25 questions are available on this topic in full.
Question 1
4 marks(a) State one use of a good conductor of heat.
(b) State one use of a poor conductor of heat.
(c) Give two examples of kitchen items that make use of poor conductors.
(4 marks)
Marking scheme
(a) Making cooking pots/sufurias, kettles or irons (1 mark). (b) Making handles, oven gloves or cloths for holding hot pots (1 mark). (c) Any two: wooden cooking spoon, plastic/wooden pot handle, oven glove, pot-holder cloth, thermos flask (2 marks).
Question 2
1 markA thermos flask keeps drinks hot by reducing heat loss through
A. conduction only
B. radiation only
C. evaporation only
D. conduction, convection and radiation
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 3
4 marks(a) What is a good conductor of heat?
(b) What is a poor conductor of heat?
(c) Give one example of each.
(4 marks)
Marking scheme
(a) A material that allows heat to pass through it easily/quickly (1 mark). (b) A material that does not allow heat to pass through it easily (1 mark). (c) Good conductor: metal/iron/copper/aluminium; poor conductor: wood/plastic/cloth/rubber/glass (1 mark each = 2 marks).
Question 4
1 markWhen removing a hot sufuria from the fire, it is safest to use ___.
A. your bare wet hands
B. a piece of paper
C. a metal rod
D. a dry cloth or pot holder
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 5
1 markHeat is transferred through solids by a process called
A. conduction
B. convection
C. radiation
D. evaporation
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 6
1 markA woollen blanket keeps us warm at night because it ___.
A. produces its own heat
B. cools the body down
C. is a good conductor of heat
D. is a poor conductor and traps body heat
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 7
2 marksState two sources of heat used in a home.
(2 marks)
Marking scheme for this question
Create a free account to see itQuestion 8
1 markA material that does NOT allow heat to pass through it easily is called ___.
A. a good conductor
B. a source of heat
C. a liquid
D. a poor conductor (insulator)
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 9
1 markWhich of the following is a source of heat used for cooking in many Kenyan homes?
A. ice
B. cold water
C. a stone
D. charcoal (jiko)
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 10
1 markHeat from the sun reaches the earth by
A. reflection
B. conduction
C. radiation
D. convection
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 11
1 markDark-coloured clothes feel hotter in the sun because they
A. produce their own heat
B. are heavier
C. absorb more heat
D. reflect more heat
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 12
3 marks(a) In which direction does heat move between two objects that are touching?
(b) Give an example from everyday life that shows heat moving in this direction.
(3 marks)
Marking scheme
(a) From the hotter object/place to the colder object/place (1 mark). (b) Any suitable example: hot tea warms a cold cup; a metal spoon in hot food becomes hot; warming cold hands near a fire (2 marks).
Question 13
1 markA metal spoon left in a cup of hot tea soon becomes hot. This shows that metal is ___.
A. a source of heat
B. a poor conductor of heat
C. a type of insulator
D. a good conductor of heat
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 14
1 markA cooking sufuria is made of metal because metal ___.
A. cannot get hot at all
B. is a poor conductor of heat
C. keeps the heat away from the food
D. allows heat to pass quickly to the food
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 15
1 markA vacuum flask (thermos) keeps tea hot for a long time because it ___.
A. cools the tea slowly using ice
B. adds more heat to the tea
C. reduces the escape of heat from the tea
D. is made of good conductors only
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 16
1 markA metal rod held at one end over a flame becomes hot at the other end. This is an example of
A. conduction
B. evaporation
C. convection
D. radiation
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 17
1 markWhich of the following materials allows heat to pass through it easily?
A. plastic
B. metal
C. dry cloth
D. wood
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 18
4 marksState four safety measures to observe when handling hot objects at home.
(4 marks)
Marking scheme
Award 1 mark each for any four: use a dry cloth, pot holder or gloves; do not touch hot metal with bare hands; keep young children away from the jiko/fire; turn pot handles inwards on the stove; allow hot items to cool before touching; carry hot liquids carefully. (4 marks)
Question 19
1 markWhich material would be the best choice for making a handle that stays cool on a hot jiko?
A. copper
B. wood
C. aluminium
D. iron
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 20
1 markWhich one of the following is the greatest natural source of heat on Earth?
A. the moon
B. the wind
C. the sun
D. the soil
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 21
1 markHeat is transferred through liquids and gases mainly by
A. convection
B. magnetism
C. radiation
D. conduction
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 22
4 marksMueni put a metal spoon into a sufuria of hot uji. After a short while the top of the spoon became hot even though it was not touching the uji.
(a) Explain why the top of the spoon became hot.
(b) Why are the handles of sufurias made of wood or plastic?
(4 marks)
Marking scheme
(a) Metal is a good conductor of heat, so heat was conducted (travelled) along the spoon from the hot end to the cold end (from hot to cold) (2 marks). (b) Wood and plastic are poor conductors, so heat does not pass through to the hand, which prevents burns (2 marks).
Question 23
2 marksExplain why covering yourself with a thick blanket keeps you warm at night.
(2 marks)
Marking scheme
A blanket is a poor conductor of heat (1 mark); it traps the heat from your body and stops it from escaping to the cold air, keeping you warm (1 mark). (2 marks)
Question 24
1 markWhich of the following is a good conductor of heat?
A. Rubber
B. Aluminium
C. Plastic
D. Wood
(1 mark)
Marking scheme for this question
Create a free account to see itQuestion 25
1 markHeat always moves from a place that is ___.
A. low to a place that is high
B. cold to a place that is hot
C. wet to a place that is dry
D. hot to a place that is cold
(1 mark)
Marking scheme for this question
Create a free account to see it19 more marking schemes are on this page. A free account opens all of them, and lets you build your own paper on the topics you have actually taught, laid out in KNEC format with its full marking scheme.
Create a free account