Thermal Energy

2. What is needed for thermal energy to flow from colder to hotter objects?
3. Heat flows spontaneously from hot objects to ___ objects.
6. Examples include wood, air, wool, and foam
10. The transfer of thermal energy from one object to another because of a temperature difference
11. Depends on the mass, temperature, and phase of an object
12. The amount of heat needed to raise the temperature of one gram by one degree Celsius.
14. Material that conducts thermal energy well.
15. Conduction in gases is ___ than in liquids and solids.
16. Examples include ocean currents and weather systems
17. Thermal ___ is a decrease in the volume of a material due to a temperature decrease.

1. Transfer of thermal energy with no overall transfer of matter
4. The first law of thermodynamics states that energy is ___.
5. Transfer of energy by waves
7. Glass thermometers use thermal ___ .
8. Transfer of thermal energy when particles of a fluid move from one place to another.
9. Thermal energy not converted into work
11. The ___ law of thermodynamics states that absolute zero cannot be reached.
13. A measure of how hot or cold an object is compared to a reference point.