1. The Sun is the [?] source of heat energy.
2. The SI unit for temperature is the [?].
3. Solids [?] when heated and [?] when cooled.
4. [?] energy can flow through a vacuum.
5. Heat flows in a solid by [?].
6. Heat from the Sun reaches the Earth by [?].
7. Sea breeze blows during the [?] from sea to land.
8. A [?] and [?] surface is good radiator of heat.
9. The cooling colis of refrigerator are painted [?] to ensure that the heat is lost quickly.
10. We use a [?] to measure temperature.