States of Matter Unit 2

Front

What is condensation?

Back

Condensation is the process by which water vapor in the air cools and changes into liquid water, often seen as fog on mirrors or dew on grass.

Front

What has more thermal energy: a hot cup of tea or a large body of water at a lower temperature?

Back

A large body of water, like Lake Erie, has more thermal energy because it contains more water molecules, even if its temperature is lower.

Front

Which has the most thermal energy: an 8 oz glass of water at 35°C, a 4 oz glass at 35°C, a 12 oz glass at 35°C, or a 10 oz glass at 35°C?

Back

A 12 oz glass of water at 35°C has the most thermal energy because it has more water molecules.

Front

What is freezing?

Back

Freezing is the change of state from a liquid to a solid, occurring when the temperature drops below the freezing point.

Front

How are the particles in a liquid arranged?

Back

The particles in a liquid are close together but can slide past one another, allowing liquids to flow.

Front

What is evaporation?

Back

Evaporation is the process by which liquid water turns into water vapor, usually occurring at the surface of the liquid.

Front

What is boiling?

Back

Boiling is the rapid change of a liquid into vapor when it reaches its boiling point, producing bubbles throughout the liquid.

Front

What is sublimation?

Back

Sublimation is the process where a solid changes directly into a gas without becoming a liquid first, like dry ice turning into carbon dioxide gas.

Front

What is the difference between thermal energy and temperature?

Back

Thermal energy is the total energy of all particles in a substance, while temperature measures the average energy of the particles.

Front

What happens to particles when a substance is heated?

Back

When a substance is heated, its particles gain energy, move faster, and may change state (e.g., from solid to liquid).