Thermal Energy

The change of state from a solid to a liquid is called ______.

As temperature increases, molecules _____________

Another name for heat energy is ________

What happens to the particles of a substance as it freezes?

To measure the temperature difference between two cups of water, you would use a _____

The process of a liquid turning into a gas is called ______.

The temperature at which a solid becomes a liquid is called its ______.

The temperature at which a liquid becomes a solid is called its ______.

What is the main source of thermal energy on Earth?

The transfer of thermal energy through direct contact is called ______.