Question

exit ticket: phase changes
directions: answer the questions below

1. what must be added or removed to matter in order for a phase change to occur?

1. name the phase change that is occurring in each scenario below?

a. wet clothes dry
b. kool - aid becomes popsicles
c. water vapor in the air becomes dew in the grass

1. what phase change is occurring in the diagram below? what role does thermal energy play?

explain in cer format.
(three images showing a woman with a barrel: first labeled liquid, second boiling, third gas)

Explanation:

1. Phase changes require adding/removing thermal energy to alter molecular motion.

2a. Liquid water in clothes turns to gas (evaporation).
2b. Liquid Kool-aid solidifies (freezing).
2c. Water vapor (gas) becomes liquid dew (condensation).

1. The diagram shows liquid → gas via boiling; thermal energy is added to break liquid bonds, enabling vaporization. CER: Claim (vaporization occurs), Evidence (liquid → boiling → gas labels), Reasoning (added thermal energy increases molecular motion to escape liquid phase).

Answer:

1. Thermal energy

2a. Evaporation
2b. Freezing
2c. Condensation

1. Phase change: Vaporization (boiling); Thermal energy is added