Answer: The answer is Phase changes require either the addition of heat energy (melting, and evaporation) or subtraction of heat energy (condensation and coldness). Changing the amount of heat energy usually causes a temperature change.
Step-by-step explanation:
For example it can be like 98 degrees today and it can be like 66 degrees the next day. It causes the weather to change. Weather changes so much because the Earth is constantly spinning. Lands and water bodies heat up differently that cause constant atmospheric change. Also note that "seasons" are not the same as weather. Seasons have to do with the angle of the solar radiation we receive caused by the tilt of the Earth on it's axis.