Difficulty: Medium

Average Score: 58%

Which example represents a change from the liquid state of matter to the gas state of matter?

Rationale

Rain drops on a vehicle evaporate when the sun comes out.

This process exemplifies the transition from the liquid state of matter to the gas state, known as evaporation, as the heat from the sun provides energy to convert the liquid water into vapor.

A (A pond freezes as the air temperature drops in winter.) YOUR ANSWER

This choice describes a change from the liquid state to the solid state, known as freezing. As the temperature decreases, the water molecules lose energy and arrange themselves into a solid structure, rather than transitioning to a gaseous form.

B (A cube of metal melts under extreme temperature.) YOUR ANSWER

This option illustrates melting, which is a transition from the solid state to the liquid state as the temperature increases. It does not depict a change to the gas state, but rather the opposite transformation.

C (Rain drops on a vehicle evaporate when the sun comes out.) CORRECT

This option correctly identifies evaporation, where liquid water absorbs heat and transitions into water vapor, representing a change from the liquid state to the gas state. This process is driven by the sun's heat, making it a clear example of the desired change.

D (Dry ice turns to carbon dioxide vapor at room temperature.) YOUR ANSWER

While this choice describes a change from solid to gas, known as sublimation, it does not involve a liquid state. Dry ice skips the liquid phase entirely, transitioning directly from solid carbon dioxide to its gaseous form.

Conclusion

The transition from the liquid state to the gas state of matter is best illustrated by the evaporation of raindrops on a vehicle when exposed to sunlight. Other choices either describe different phase changes, such as freezing or melting, or do not involve the liquid state at all, like the sublimation of dry ice. Understanding these phase transitions is crucial in studying the behavior of matter under varying temperature conditions.

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