Heat Transfer

2. Type of wave that transfers thermal energy without needing particles.
5. Colour that is the best absorber and emitter of radiation.
6. Space without particles where radiation can travel.
8. surface Reflects thermal radiation back into a container to keep contents warm.
9. Energy transferred by radiation from hotter objects to cooler ones.
11. Texture that is the best absorber and emitter of radiation.
12. Transfer of thermal energy by movement of fluids (liquids or gases) caused by temperature differences.
13. Colour that is the worst absorber and emitter of radiation.
14. Texture that is the worst absorber and emitter of radiation.

1. __________ surface area increases emission and absorption of radiation.
3. Type of solid, liquid, or gas that radiation can pass through.
4. Poor conductor used between brick walls to prevent convection currents.
6. flask Container designed to reduce conduction and radiation, keeping liquids hot or cold for long periods.
7. Transfer of thermal energy through solids by direct contact of particles.
10. To give out thermal energy as radiation.