Heat and Temperature

Grade 6 Science — Heat and Temperature: 25 practice questions with instant scoring and explanations.

1. What is the SI unit of temperature?
2. Which method of heat transfer does NOT require a medium?
3. In conduction, heat is transferred through direct contact. Which material conducts heat fastest?
4. What is convection in simple terms?
5. The Sun's heat reaches Earth through which method of heat transfer?
6. At what temperature does water freeze on the Celsius scale?
7. A thermometer uses which principle to measure temperature?
8. Which is a thermal insulator among these?
9. Why do we feel warm near a fire even though we are not in contact with it?
10. In a room heater, hot air rises due to convection. This happens because hot air is...
11. A metal spoon in hot tea becomes hot due to which process?
12. What does a clinical thermometer measure?
13. Which object will heat up fastest in sunlight?
14. The boiling point of water in Celsius is:
15. Which of these materials is the best thermal conductor?
16. A vacuum cannot transfer heat through which method?
17. Why do people wear woolen clothes in winter?
18. In convection, the denser (heavier) fluid parts move...
19. A thermos flask keeps liquids hot by reducing heat transfer through which methods?
20. What happens to the volume of a metal when heated?
21. Which is an example of radiation heat transfer?
22. A good absorber of heat is also a good...
23. Why does a black car get hotter than a white car in sunlight?
24. The reading on a mercury thermometer increases when temperature:
25. Which layer of Earth's atmosphere is heated primarily by radiation from the Sun?