Heat Transfer

5. What determines the direction of heat flow?
7. Internal energy is the --- energy of the particles within a substance.
8. Snow doesn’t melt very much on a clear and sunny day because the sunlight is ---.
10. A good --- transfers energy quickly – allows heat to flow easily.
12. This form of energy transfer does not require a physical medium to move the energy.
14. Temperature is the --- kinetic energy of the particle of a substance.
16. A good --- transfers energy slowly – slows the flow of heat.
17. Transfer of energy within a fluid by movement of the particles in currents.
18. The energy required to raise the temperature of 1 g of a substance by 1 °C is the --- heat capacity.
19. Heat (a form of energy) is measured in ---.

1. Any process that absorbs energy from the surroundings is ---.
2. When you touch a nail stuck in ice cold flows from the nail into your hand – TRUE or FALSE.
3. A net --- is any object whose surface emits more energy than it absorbs.
4. Transfer of energy via electromagnetic --- is called radiation.
6. Both gases & liquids are ---.
9. Transfer of energy by the collisions of atoms & free electrons within a substance.
11. Heat is always the flow of energy from high temperature to low temperature – TRUE or FALSE
13. Any process that releases energy into the surroundings is ---.
15. In thermal --- two objects placed in contact transfer heat from one to the other until they reach the same temperature and the transfer stops.