Question

1. which of the following real - world examples best illustrates the process of condensation?

○ snow forming in clouds.
○ frost forming on a cold car windshield.
○ water droplets forming on the outside of a cold glass of water on a humid day
○ mothballs gradually disappearing over time.

1. which of the following real - world examples best illustrates the process of deposition?

○ water vapor in the air turning directly into frost on a cold surface.
○ rain turning into ice as it falls through a cold layer of air.
○ ice melting into liquid water in the sun.
○ water boiling in a kettle and turning into steam.
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Explanation:

Question 9

• Snow forming in clouds: This is deposition (gas to solid), not condensation.
• Frost forming on a cold car windshield: This is deposition (water vapor to ice), not condensation.
• Water droplets forming on the outside of a cold glass of water on a humid day: Warm, humid air has water vapor. When it touches the cold glass, the vapor cools and changes to liquid water droplets—this is condensation (gas to liquid).
• Mothballs gradually disappearing over time: This is sublimation (solid to gas), not condensation.

• Water vapor in the air turning directly into frost on a cold surface: Deposition is the process of gas changing directly to solid. Water vapor (gas) turns to frost (solid ice) directly, so this is deposition.
• Rain turning into ice as it falls through a cold layer of air: This is freezing (liquid to solid), not deposition.
• Ice melting into liquid water in the sun: This is melting (solid to liquid), not deposition.
• Water boiling in a kettle and turning into steam: This is evaporation/boiling (liquid to gas), not deposition.

Answer:

Water droplets forming on the outside of a cold glass of water on a humid day.

Question 10