Describe the following concepts, and fully answer the short answer questions.

Concepts:

-Thermal Energy

-Temperature

-Absolute Zero

-Heat

-Thermodynamics

-First Law of Thermodynamics

-Second Law of Thermodynamics

-Entropy

-Third Law of Thermodynamics

-Specific Heat Capacity

1. Distinguish between the concepts of thermal energy, temperature, and heat.

2. Explain why nothing can be cooled below absolute zero.

3. Provide two everyday examples of thermal expansion (that were not used in class).

4. Why is ice less dense than liquid water? What initially happens to the density of frozen water as it is warmed?