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Primary 4 Science Heat Quiz
Free P4 Science Heat quiz, Ox Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.
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Questions
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Answers
Primary 4 Science Quiz - Heat: Answer Key
Answer 1.
(c) An ice cube. (2m)
Answer 2.
energy. (2m)
Answer 3.
False. A thermometer measures temperature, not heat. (2m)
Answer 4.
Any two: electric iron, stove, hair dryer, oven, light bulb, heater. (1m each)
Answer 5.
They expand (become bigger). (2m)
Answer 6.
They contract (become smaller). (2m)
Answer 7.
- (a) Temperature tells us how hot or cold an object is.
- (b) Degrees Celsius (°C). (1m each)
Answer 8.
Heat from the hot soup travels up the metal spoon to the handle by conduction. (2m)
Answer 9.
- (a) Metal.
- (b) Wood and plastic are poor conductors (insulators), so little heat reaches the hand. (1m each)
Answer 10.
Radiation. (2m)
Answer 11.
Convection. (2m)
Answer 12.
- (a) 0°C
- (b) 100°C (1m each)
Answer 13.
- (a) Melting (ice changes to water).
- (b) Condensation (water vapour changes to water). (1m each)
Answer 14.
The jacket traps air and our body heat, slowing heat loss from our body to the cold surroundings. (2m)
Answer 15.
The heated ball gained heat and expanded, so it became too big to fit through the ring. (2m)
Answer 16.
The gaps allow the tracks to expand on hot days without bending or buckling. (2m)
Answer 17.
Its temperature decreased because the tea lost heat to the cooler surroundings. (2m)
Answer 18.
Conductors: iron nail, aluminium foil. Insulators: rubber glove, woollen scarf. (0.5m each)
Answer 19.
Yes, they are at the same temperature. Metal conducts heat to the hand faster than wood, so the railing feels hotter. (2m)
Answer 20.
It reduces heat loss — the vacuum between the walls stops heat escaping by conduction and convection (shiny surfaces also reduce radiation). Any one way accepted. (2m)