HEAT 🔥 ❄️ (DIWAN ACADEMY)

1. What is conduction?

2. Which method of heat transfer does not require a medium?

3. True or False: Convection occurs in solids.

4. Fill in the blank: __________ is the transfer of heat in fluids caused by the movement of the fluid itself.

5. What type of thermometer uses mercury to measure temperature?

6. True or False: A digital thermometer can provide instant readings.

7. Fill in the blank: The method of heat transfer that involves the emission of energy in the form of waves is called __________.

8. Which type of thermometer is used to measure the temperature of an object without direct contact?

9. What is the main cause of convection currents in the atmosphere?

10. True or False: All materials conduct heat equally well.

11. Fill in the blank: In a __________, hot air rises and cold air sinks, creating a cycle.

12. What is the primary function of a thermometer?

13. True or False: Heat always moves from a hotter object to a cooler object.

14. Fill in the blank: __________ is an example of heat transfer through conduction.

15. Which type of thermometer is commonly used in clinical settings?

16. True or False: The greater the temperature difference between two objects, the faster heat transfer occurs.

17. Fill in the blank: The process of heat transfer that occurs in liquids and gases is known as __________.

18. True or False: Heat can be transferred through a vacuum.

19. Fill in the blank: The temperature at which a substance changes from solid to liquid is called __________.

20. Which of the following is an example of radiation?