Final answer:
The change in phase from a solid to a gas is called Sublimation and from a liquid to a gas is termed Evaporation. These terms describe the phase changes without the intermediate state being involved for sublimation and the natural transition to a gas at temperatures below boiling for evaporation.
Step-by-step explanation:
For the two phrases provided, the associated terms related to phase changes of matter are:
- a. Sublimation: The change in phase from a solid to a gas.
- b. Evaporation: The change in phase from liquid to gas.
These terms describe specific types of phase changes where matter transitions between different states due to energy changes, typically involving heat. Sublimation occurs when a solid goes directly into the gas phase without becoming a liquid first, like dry ice (solid CO2) turning into carbon dioxide gas. On the other hand, evaporation is the process where a liquid becomes a gas, often observed when water turns into vapor at temperatures below its boiling point.